Vegetarian Newsletter
A Vegetable Crops Extension Publication
University
of Florida
Institute of Food and Agricultural Sciences
Cooperative Extension Service
![]()
Vegetarian
99-12
December
1999
(Note: Anyone is free to use the
information in this newsletter. Whenever possible,
please give credit to the authors. The purpose of trade names in this publication is
solely for the purpose of providing information and does not necessarily
constitute a recommendation of the product.)
Southeast Vegetable and Fruit Expo. December 13-15, 1999. Joseph S. Koury Convention Center, Greensboro, NC. Contact: Bonnie Price Holloman (919)772-2204.
Australian Vegetable Tour. January 7-10, 2000. Contact: Dr. Doug Sanders, NC State University (919) 515-1222, E-mail: Doug_Sanders@NCSU.edu
Suwannee Valley Field and Greenhouse Shortcourse and Trade Show. January 8, 2000. Suwannee County Coliseum, Live Oak, FL. Contact: Bob Hochmuth (904) 362-1725.
2000 Florida Postharvest Horticulture
Institute and Industry Tour.
Institute - March 6th, University of Florida, Gainesville, with
video-links to several sites in Florida.
Industry Tour - March 7-10th Statewide
For more information contact: Steve Sargent, (352) 392-1928 ext. 215, e-mail or
Abbie Fox (352) 392-1928 ext.235, fax (352) 392-5653, e-mail
FDA Guide to Minimize Microbial Food Safety Hazards for Fresh Fruits and Vegetables
The Centers for Disease Control recently
released the following information: "To better quantify the impact of foodborne
diseases on health in the United States, we compiled and analyzed information from
multiple surveillance systems and other sources. We estimate that foodborne diseases cause
approximately 76 million illnesses, 325,000 hospitalizations, and 5,000 deaths in the
United States each year. Known pathogens account for an estimated 14 million illnesses,
60,000 hospitalizations, and 1,800 deaths. Three pathogens, Salmonella, Listeria,
and Toxoplasma, are responsible for 1,500 deaths each year, more than 75% of those
caused by known pathogens, while unknown agents account for the remaining 62 million
illnesses, 265,000 hospitalizations, and 3,200 deaths. Overall, foodborne diseases appear
to cause more illnesses but fewer deaths than previously estimated." (Source:
Food-Related Illness and Death in the United States. Paul S. Mead, Laurence Slutsker,
Vance Dietz, Linda F. McCaig, Joseph S. Bresee, Craig Shapiro, Patricia M. Griffin, and
Robert V. Tauxe. Centers for Disease Control and Prevention, Atlanta, Georgia, USA.).
Significantly, the incidence of foodborne disease attributed to fruits
and vegetables is very small compared to the total numbers. However, unpasteurized juices
and fresh sprouts have been implicated in recent outbreaks. In October, 1999 the FDA
released two guidance publications on safe sprout handling and testing of irrigation water
in sprout production (http://vm.cfsan.fda.gov/~dms/sprougd1.html and /sprougd2.html, respectively). Ensuring that our fresh produce is as safe as possible
involves close collaboration of everyone involved. Produce can become contaminated at any
point, beginning in the field and continuing through packing, handling, shipping and
retail.
The U.S. Department of Health and Human Services, Food and Drug
Administration (FDA), Center for Food Safety and Applied Nutrition (CFSAN) published the
very useful "Guide to Minimize Microbial Food Safety Hazards for Fresh Fruits and
Vegetables" for growers, packers, and shippers about one year ago as part of the
Presidents Food Safety Initiative. The guide is available by contacting FDA or
online at http://www.foodsafety.gov/~dms/prodguid.html. By identifying basic principles of microbial food safety within the
realm of growing, harvesting, packing, and transporting fresh produce, users of this guide
will be better prepared to recognize and address the principal elements known to give rise
to microbial food safety concerns. Here are the highlights from the guide:
Water Quality
Wherever water comes into contact with fresh produce, its quality dictates the potential for pathogen contamination.
Water can be a carrier of many microorganisms including pathogenic strains of Escherichia coli, Salmonella spp., Vibrio cholerae, Shigella spp., Cryptosporidium parvum, Giardia lamblia, Cyclospora cayetanensis, Toxiplasma gondii, and the Norwalk and hepatitis A viruses. If pathogens survive on the produce, they may cause foodborne illness. Even small amounts of contamination with some of these organisms can result in foodborne illness.
In general, the quality of water in direct contact with the edible portion of produce may need to be better than the quality of water in which contact with the edible portion of the plant is minimal.
Agricultural water quality will vary, particularly surface waters that may be subject to intermittent, temporary contamination, such as waste water discharge or polluted runoff from upstream livestock operations. Ground water that is influenced by surface water, such as older wells with cracked casings, may also be vulnerable to contamination.
Water quality should be adequate for its intended use. Where water quality is unknown or cannot be controlled, growers should use other good agricultural practices to minimize the risk of contamination.
Practices to help ensure adequate water quality may include ensuring that wells are properly constructed and protected, treating water to reduce microbial loads, or using alternative application methods that reduce or avoid water-to-produce contact.
Processing water should be of such quality that it does not contaminate produce.
Practices to Ensure and Maintain Water Quality. Perform periodic water sampling and microbial testing; Change water as necessary to maintain sanitary conditions; Clean and sanitize water contact surfaces, such as dump tanks, flumes, wash tanks, and hydrocoolers, as often as necessary to ensure the safety of produce; Install backflow devices and legal air gaps, as needed, to prevent contamination of clean water with potentially contaminated water (such as between potable water fill lines and dump tank drain lines; Routinely inspect and maintain equipment designed to assist in maintaining water quality, such as chlorine injectors, filtration systems, and backflow devices, to ensure efficient operation.
Prevention of contamination is preferred over application of antimicrobial chemicals after contamination occurs.
However, antimicrobial chemicals in processing water are useful in reducing microbial build-up in water and may reduce microbial load on the surface of produce. Washing fresh produce can reduce the overall potential for microbial food safety hazards. This is an important step since most microbial contamination is on the surface of fruits and vegetables. If pathogens are not removed, inactivated, or otherwise controlled, they can spread to surrounding produce, potentially contaminating a greater proportion of the produce. A number of post-harvest processes, such as hydrocooling, use of dump tanks, and flume transport, involve a high degree of water-to-produce contact. Packers should follow good manufacturing practices to maximize the potential for these processes to assist in cleaning produce.
Manure and Municipal Biosolids
Growers should follow good agricultural practices for handling animal manure or biosolids to minimize microbial hazards.
Properly treated manure or biosolids can be an effective and safe fertilizer. Untreated, improperly treated, or recontaminated manure or biosolids used as a fertilizer, used to improve soil structure, or that enters surface or ground waters through runoff, may contain pathogens of public health significance that can contaminate produce.
Good agricultural practices for the use of animal manure or biosolids include treatments to reduce pathogens and maximizing the time between application to production areas and harvest of the crops.
Growers purchasing manure should obtain a specification sheet from the manure supplier for each shipment of manure containing information about the method of treatment.
Animal feces is a known source of pathogens that can cause foodborne illness.
A particularly dangerous pathogen, Escherichia coli O157:H7, is known to originate primarily from ruminants such as cattle, sheep and deer, which shed it through their feces. In addition, animal (and human) fecal matter are known to harbor Salmonella, Cryptosporidium, and other pathogens. Domestic animals should be excluded from fresh produce fields, vineyards, and orchards during the growing season. In addition, high concentrations of wildlife (such as deer or waterfowl in a field) may increase the potential for microbial contamination.
Worker Health and Hygiene
Infected employees who work with fresh produce increase the risk of transmitting foodborne illnesses.
Be aware of existing state and Federal regulations regarding standards for worker health, hygiene and sanitation practices during the growing, packing, holding, and transport of human food. Train all employees to follow good hygienic practices.
Sanitary Facilities
Operations with poor management of human and other wastes in the field or packing facility can significantly increase the risk of contaminating produce.
Toilet facilities should be accessible. Toilet facilities should be properly located. Toilet facilities and handwashing stations should be well supplied. All facilities should be kept clean.
Field Sanitation
Poor management of human and other wastes in the field can significantly increase the risk of contaminating produce.
Microbial contamination or cross-contamination of fresh produce during pre-harvest and harvest activities may result from contact with soils, fertilizers, water, workers, and harvesting equipment. Any of these may be a source of pathogenic microorganisms. Clean harvest storage facilities prior to use. Discard damaged containers that are no longer cleanable. Clean containers or bins before using to transport fresh produce. Ensure that produce that is washed, cooled, or packaged in the field is not contaminated in the process. Remove as much dirt and mud as practicable from the produce before it leaves the field. Use harvesting and packing equipment appropriately and keep it as clean as practicable. Any equipment used to haul garbage, manure, or other debris should not be used to haul fresh produce. Keep harvest containers clean to prevent cross-contamination of fresh produce
Packing Facility Sanitation
It is important to maintain buildings, fixtures, and other physical facilities, and their grounds, in good condition to reduce the potential for microbial contamination of produce.
Operations with poor sanitation in the packing environment can significantly increase the risk of contaminating fresh produce and water used on produce. Pathogenic microorganisms may be found on the floors and in the drains in the packing facility and on the surfaces of sorting, grading, and packing equipment. Without good sanitary practices, any of these surfaces that come in contact with fresh produce could be a potential source of microbial contamination. Packers should employ good sanitation practices as a standard operating procedure to maintain control throughout the packing operation.
Transportation
The proper transport of fresh produce from farm to market will help reduce the potential for microbial contamination.
Transportation operations include transportation from the field to the cooler, packing facility, and on to distribution and wholesale terminal markets or retail centers. Microbial cross-contamination from other foods and nonfood sources and contaminated surfaces may occur during loading, unloading, storage, and transportation operations. Wherever produce is transported and handled, the sanitation conditions should be evaluated. Transporters should separate fresh produce from other food and nonfood sources of pathogens in order to prevent contamination of the produce during transport operations.
Workers involved in the loading and unloading of fresh produce during transport should practice good hygiene and sanitation practices. Product inspectors, buyers, and other visitors should comply with established hygienic practices, such as thoroughly washing their hands before inspecting produce. Inspect trucks or transport cartons for cleanliness, odors, obvious dirt or debris before beginning the loading process. Keep transportation vehicles clean to help reduce the risk of microbial contamination of fresh produce. Maintain proper temperatures to help ensure both the quality and safety of fresh produce. Load produce in trucks or transport cartons in a manner that will minimize damage.
Traceback
The ability to identify the source of a product can serve as an important complement to good agricultural and management practices intended to minimize liability and prevent the occurrence of food safety problems.
(Brecht, Ritenour, and Sargent, Vegetarian 99-12)
1998-1999 Oriental Vegetable Introduction in South Florida
Mr. Ping Qiao, a scientist with the Division of Plant Industry,
Florida Department of Agriculture and Consumer Services, initiated several field trails
during October 1998-September 1999 to conduct preliminary performance tests of 33 oriental
vegetable cultivars on a calcareous gravelly soil at the Tropical Research and Education
Center, Homestead. The seeds of most cultivars were sowed in seedling plates and
transplanted into field beds under plastic mulch when the seedlings had 3-5 true leaves.
Some of them, like radish and amaranth, were sowed directly into the field beds. The bed
height was about 8 inches and each bed was provided with 1 or 2 irrigation drip lines. The
distance between beds was 6 feet. Some insecticides and nematicides were applied when
making beds to control the pests in the soil. The Centers farm manager was in charge
of irrigation, fertilization and pest management. In spite of diligent pest control
interventions some cultivars were damaged by thrips, mites or pickleworms. Doubtless these
losses could be minimized though additional experience.
The experimental results are summarized in the table. The following
preliminary conclusions were reached:
- Regardless of the season many cultivars of oriental vegetables can be produced successfully in south Florida. In fall and winter, all hardy and semihardy vegetables and some warm season vegetables grow very well. In particular the various species of Brassica and Raphanus sativus, Lactuca sativa var. angustana can be relay planted many times and supplied for 4-5 months. Crowndaisy, chrysanthemum and mustard green can be harvested many times from the same planting provided that the plant root systems are protected from damage during harvest. Even napa was harvested more than one time from the same planting. During spring and summer, all warm season oriental vegetables and some hardy and semihardy oriental vegetables grow well. These include beans, cucurbits, solanaceous crops, amaranth, etc. Of course, the control of diseases and insects is very important for all crops, especially during the warm wet summer period.
- Some cultivars of radish and asparagus lettuce were judged to be sufficiently promising for testing farm scale production. These include Qiatouqing, Xinlinmei, Yuanyiewosun, and Amaranth.
- Experimental results showed that some varieties of napa and pak choi developed flower stalks prior to harvest. Both bolting varieties of napa and pak choi Early #5 and Aijiaoqing, respectively, originated from a low latitude region of China. To avoid the problem of bolting, varieties form higher latitudes need to be evaluated.
# |
Scientific Name |
Common Name |
Variety |
Date Planted |
Date Transplanted |
Rows Per Bed |
Distance In Row (ft.) |
Date Harvested |
Comment |
Price in Store |
1 |
Brassica pekinensis |
Pet-tsai, Napa |
Blues |
10-25-98 |
11-25-98 |
2 |
2 |
01-12-99 |
Very good |
$0.59/lb |
11-20-98 |
12-22-98 |
2 |
2 |
02-15-99 |
Very good |
$0.59/lb |
||||
12-05-98 |
01-11-99 |
2 |
2 |
02-28-99 |
Very good |
$0.59/lb |
||||
01-09-99 |
02-05-99 |
2 |
2 |
04-07-99 |
Very good |
Not available |
||||
2 |
AVRDC |
10-25-98 |
11-25-98 |
2 |
1 |
12-28-98 |
Very good |
Not available |
||
3 |
Early #5 |
12-08-98 |
01-19-99 |
2 |
2 |
02-28-98 |
Bolting |
Not available |
||
4 |
Taiwan |
10-25-98 |
11-25-98 |
2 |
1 |
12-15-98 |
Very good |
Not available |
||
12-16-98 |
4 |
1 |
02-02-99 |
Very good |
Not available |
|||||
5 |
Brassica chinensis |
Pakchoi |
Qingjiangcai |
10-25-98 |
11-25-98 |
2 |
1 |
12-15-98 |
Very good |
$0.79/lb |
12-16-98 |
4 |
1 |
02-02-99 |
Very good |
$0.79/lb |
|||||
6 |
Aijiaoqing |
10-25-98 |
11-25-98 |
2 |
1 |
12-15-98 |
Bolting |
$1.29/lb |
||
7 |
Fenpiqing |
12-16-98 |
4 |
1 |
02-02-99 |
Fair |
Not available |
|||
8 |
Shanghaiqing |
12-16-98 |
4 |
1 |
02-02-99 |
Fair |
Not available |
|||
9 |
Wuyueman |
12-16-98 |
4 |
1 |
02-02-99 |
Very good |
Not available |
|||
10 |
B. alboglabra |
Gailan |
Baihuajielan |
10-25-98 |
11-25-98 |
2 |
1 |
12-28-98 |
Good |
$1.85/lb |
11 |
B. juncea |
Green Mustard |
Xiuelihong |
11-25-98 |
4 |
1 |
01-15-99 |
Very good |
Not available |
|
01-19-99 |
4- |
1 |
03-09-99 |
Very good |
Not available |
|||||
12 |
Chrysanthemum coronarium |
Crowndaisy |
Tonghao |
11-25-98 |
4 |
1 |
01-15-99 |
Very good |
$2.99/lb |
|
13 |
Vigna sesquipedalis |
Yard-long bean |
Jiangdou |
10-25-98 |
11-25-98 |
1 |
1 |
01-05-99 |
Insects |
$1.39/lb |
14 |
Lagenaria siceraria |
Bottle gourd |
Niutuihulu |
10-25-98 |
12-22-98 |
1 |
2 |
02-15-99 |
Good |
$0.69/lb |
04-04-99 |
04-29-99 |
1 |
2 |
06-06-99 |
Good |
$0.69/lb |
||||
15 |
Piaohulu |
06-18-99 |
07-06-99 |
1 |
2 |
08-20-99 |
Fair |
None |
||
16 |
Benincasa hispida |
Wax gourd |
Yuandonggua |
10-25-98 |
12-22-98 |
1 |
2 |
03-20-99 |
Very good |
$0.79/lb |
04-05-99 |
05-03-99 |
1 |
2 |
07-05-99 |
Very good |
$0.79/lb |
||||
17 |
Solanum melongena |
Long eggplant |
Changqiezi |
10-25-98 |
01-10-99 |
2 |
2 |
03-19-99 |
Very good |
$0.99/lb |
05-17-99 |
06-14-99 |
1 |
2 |
08-21-99 |
Very good |
$0.99/lb |
||||
18 |
Cucumis sativus |
Chinese cucumber |
12-22-98 |
01-24-99 |
1 |
1 |
02-26-99 |
Good |
None |
|
05-19-99 |
06-14-99 |
1 |
1 |
07-21-99 |
Insects |
None |
||||
19 |
Lactuca sativa Var. augustana |
Asparagus Lettuce |
Yuanyewesum |
12-08-98 |
01-19-99 |
2 |
1 |
03-21-99 |
Very good |
None |
01-13-99 |
02-11-99 |
2 |
1 |
04-09-99 |
Very good |
None |
||||
20 |
Luffa acutangula |
Chinese okra |
Lengjiaosigua |
04-20-99 |
05-19-99 |
1 |
2 |
09-20-99 |
No fruit in summer |
$0.99/lb |
21 |
Luffa cylindrica |
Sponge gourd |
Duansigua |
04-20-66 |
05-19-99 |
1 |
2 |
07-05-99 |
Very good |
$0.79/lb |
22 |
Amaranthus tricolor |
Amaranth |
Hongxiancai |
04-13-99 |
4 |
1 |
05-20-99 |
Very good |
$1.45/lb |
|
23 |
Brassica rapa var. Parachinesis |
Choy sum |
Youcaixin |
06-21-99 |
2 |
1 |
07-25-99 |
Very good |
$1.39/lb |
|
24 |
Cucurbita pepo var. condensa |
Summer squash |
Xihulu |
04-12-99 |
05-19-99 |
1 |
2 |
07-25-99 |
Good |
|
25 |
Cucurbita maxima |
Winter squash |
Sungua |
04-12-99 |
05-19-99 |
1 |
2 |
07-31-99 |
Fair |
|
26 |
Cucurbita moschata |
Squash |
Changnangua |
04-12-99 |
05-19-99 |
1 |
2 |
07-31-99 |
Good |
Not available |
27 |
Yuannangua |
04-12-99 |
05-19-99 |
1 |
2 |
07-31-99 |
Good |
Not available |
||
28 |
Shidun nungua |
04-12-99 |
05-19-99 |
1 |
2 |
07-31-99 |
Very good |
Not available |
||
29 |
Ten sisters |
04-12-99 |
05-19-99 |
1 |
2 |
07-25-99 |
Very good |
Not available |
||
30 |
Raphanus sativus |
Radish |
Yuanluobe |
12-16-98 |
2 |
1 |
02-05-99 |
Very good |
Not available |
|
31 |
Changluobe |
12-16-98 |
2 |
1 |
02-25-99 |
Very good |
$0.59/lb |
|||
32 |
Qiaotouqing |
12-16-98 |
2 |
1 |
02-25-99 |
Very good |
Not available |
|||
33 |
Xinlimei |
12-16-98 |
2 |
1 |
02-25-99 |
Very good |
Not available |
(Li, Vegetarian 99-12)
Cantaloupe Variety Evaluation, Spring 1999
Cantaloupe varieties were evaluated at the Gulf Coast Research and Education Center, Bradenton in the spring 1999 season. The trial included 27 entries.
Production Practices
The EauGallie fine sand was prepared in late
February by incorporation of 0-0.8-0 lb N-P205-K20 per
100 linear bed feet (lbf). Beds were formed and fumigated with methylbromide:
chloropicrin, 67:33 at 2.3 lb/100 lbf. Banded fertilizer was applied in shallow grooves on
the bed shoulders at 2.34-0-3.25 lb N-P205-K20/100 lbf
after the beds were pressed and before the black polyethylene mulch was applied. The total
fertilizer applied was equivalent to 203-70-283 lb N-P205-K20/acre.
The final beds were 32 in. wide and 8 in. high, and were spaced on 5 ft centers with six
beds between seepage irrigation/drainage ditches which were on 41 ft centers.
Twenty-seven cantaloupe hybrids were direct seeded on 12 March in holes
2 ft apart that were punched in the black polyethylene mulch. The 20 ft long plots
contained 10 plants each. Fourteen of the entries were replicated four times in a
randomized, complete block design. The remaining thirteen entries were planted in
duplicate plots. Weed control in row middles was by cultivation and application of
paraquat. Pesticides were applied as needed for control of silverleaf whitefly
(endosulfan, abamectin, and paraffinic oil), downy mildew (chlorothalonil and
azoxystrobin), and lepidopteris larvae (Bacillus thuringiensis and methomyl). Plant
stand counts recorded just before the vines grew together showed no significant
differences among plots.
Cantaloupes were harvested ten times beginning on 20 May and ending on
11 June. Marketable fruit were separated from culls that included fruit weighing less than
1.5 lb or that were cracked, rotted, or poorly shaped. Observations were made on fruit
shape, sutures, and netting. Soluble solids were determined with a hand-held digital
refractometer on several fruit from each entry on several harvest dates.
Results
Replicated Trial. Early yields, as represented by the first
three of ten harvests ranged from 0 for Desert Queen to 177 cwt/acre for
Desert Princess. Eight other entries had early yields similar to those of
Desert Queen. Average fruit weight of early harvested cantaloupes ranged from
3.2 pounds for Zodiac to 7.2 pounds for Vienna. Three other
entries had fruit weight similar to Vienna. Soluble solids, a measure of
sweetness, varied from 7.8% for Zodiac to 12.2% for SME 7124. Very good
internal quality is used to describe cantaloupes containing not less than 11% soluble
solids. Using this criterion, only Allstar, Athena,
Cordele, SME 7122 and SME 7124 would qualify for the very good internal
quality designation.
Total yield in the replicated trial varied from 346 cwt/acre for SMX
7204 to 688 cwt/acre for SMX 7119. Eight other entries had yields similar to those of SMX
7119. Average fruit weight ranged from 3.7 pounds for Desert Queen to 6.8
pounds for Vienna. Soluble solids ranged from 9.0 for Zodiac and
Cruiser to 10.8 for Eclipse. Cull fruit ranged from 30 cwt/acre
for Cruiser to 139 cwt/acre for SMX 7110. Stem-end cracks, fruit rots, and
undersize fruit were the principal defects leading to cull fruit.
Observational Trial. Early yields varied from 0 in
Dallas, HMX 7607, RML 6977, and WC 10 to 296 cwt/acre in RML 6971. Average
fruit weight of those entries that were harvested ranged from 3.3 pounds for RML 5462 to
7.0 pounds for WC 11. Soluble solids varied from 9.8% for HMX 7604 to 15.3% for
Carole.
Total yield ranged from 231 cwt/acre for Dallas to 677
cwt/acre for HMX 5587. Nine other entries had yields similar to those of HMX 5587. Average
fruit weight varied from 2.9 pounds for Super 45 to 6.9 pounds for RML 6969.
The range of soluble solids was from 9.3% for WC 11 to 11.9% for Carole. WC
10, RML 6976, Carole, Super 45, and Dallas could claim
the very good internal quality designation. Cull fruit varied from 18 to 128 cwt/acre
because of stem-end cracks, fruit rots, and undersized fruit.
Those readers needing more details should request Research Report BRA
1999-09 from the author.
(Maynard, Vegetarian 12-99)
Tomato Variety Evaluation, Spring 1999
Tomato varieties were evaluated in the spring 1999 season at the Gulf Coast Research and Education Center, Bradenton. The trials included 27 replicated entries and 66 observational entries.
Production Practices
The EauGallie fine sand was prepared in early February by
incorporation of 0-0.8-0 lb. N-P205-K20 per 100 linear
bed feet (lbf). Beds were formed and fumigated with methylbromide: chloropicrin, 67:33 at
2.3 lb/100 lbf. Banded fertilizer was applied in shallow grooves on the bed shoulders at
2.34-0-3.25 lb N-P205-K20/100 lbf after the beds were
pressed and before the black polyethylene mulch was applied. The total fertilizer applied
was equivalent to 203-70-283 lb N-P205-K20/A. The final
beds were 32 in. wide and 8 in. high, and were spaced on 5 ft centers with six beds
between seepage irrigation/drainage ditches which were on 41 ft centers.
Transplants were set in the field on 23 February and spaced 18 in.
apart in single rows down the center of each bed. Transplants were immediately drenched
with water containing imidacloprid for silverleaf whitefly control. Four replications of
10 plants per entry were arranged in a randomized complete block design in the replicated
trial and single 10-plant plots were used in the observational trial. Plants were staked
and tied without pruning.
Plants were scouted for pests throughout the season. Silverleaf
whitefly, lepidopterous larvae, and leafminers were the primary insects found. Bacillus
thuringiensis abamectin, methomyl, fenpropathrin, endosulfan, esfenvalerate, and
paraffinic oil were used according to label instructions to control insect pest
populations during the season. A preventative spray program using azoxystrobin and
chlorothalonil was followed for control of plant pathogens. Tomato yellow leaf curl virus
affected plants were removed and disposed of early in the season.
Fruit of the replicated entries were harvested at or beyond the
mature-green stage on 20 May and 2 June. Tomatoes were graded as cull or marketable by
U.S. Standards for Grades and marketable fruit were sized by machine. Both cull and
marketable fruit were counted and weighed. Subjective ratings of plant and fruit
characteristics were made on the observational entries.
Results
Total marketable yield from two harvests ranged from 1778 25-pound
cartons/acre for ACR 8608 to 2878 cartons/acre for EX 10069. Fifteen other entries had
yields similar to those of EX 10069. All entries produced yields well above the state
average of 1525 cartons/acre for spring 1997-98. Total yields in spring 1999 were similar
to those obtained in each of the previous five spring seasons at this location.
Yields of extra large fruit varied from 1176 cartons/acre for Fla. 7859
to 2303 cartons/acre for BHN 399. Twelve other entries had extra large fruit yields
similar to those of BHN 399. Large fruit yields ranged from 257 cartons/acre for ASX 202
to 696 cartons/acre for Fla. 7862. Eight other entries had large fruit yields similar to
those of Fla. 7862. Average fruit weight ranged from 5.3 ounces for Fla. 7859 to 7.0
ounces for BHN 399. Fifteen other entries had average fruit weight similar to BHN 399.
Cull fruit by weight varied from 12% for EX 10089 and Floralina to 31% for ACR
8608. The predominant defects were large blossom-end scars, rough shoulders, and
persistent green shoulders.
Those readers needing more details on this trial should request
Research Report BRA-1999-08 from the author.
(Maynard, Vegetarian 99-12)
Postharvest Horticulture Institute & Industry Tour
The ninth annual Postharvest Horticulture Institute &
Industry Tour is designed for produce industry professionals, educators, researchers
and students involved in such diverse areas as field and packinghouse management,
wholesale and retail sales and import/export.
The Postharvest Institute will be held on Monday, 6 March, in
the facilities of McCarty Hall on the campus of the University of Florida in Gainesville.
This years topic is "Innovations in Fresh Produce Transportation" and
will feature leading experts presenting the latest practical information for maintaining
postharvest quality of tropical, sub-tropical and temperate fruit, vegetables and
ornamental crops destined for domestic and export markets. A reference notebook and
industry reference materials will also be available.
The Postharvest Institute will also be held at three UF/IFAS research
and educations via live, video-conferencing. The locations are: Tropical Research &
Education Center (Homestead), Southwest Florida Research & Education Center
(Immokalee) and Indian River Research & Education Center (Ft. Pierce).
The Postharvest Industry Tour. The tour will provide an
opportunity to experience first-hand the latest technologies for the harvest, handling and
shipping of subtropical and tropical fruits, warm and cool season vegetables and
ornamental crops. Dr. Steven Sargent, Extension Postharvest Specialist, will conduct the
tour, with visits planned to the following areas: Dover/Plant City (strawberry), southwest
coast (vegetable, citrus harvest, packing & cooling; protected vegetable production)
and Tampa (port facilities, a regional produce distribution warehouse and a major
supermarket produce department).
The tour will depart from Gainesville on Tuesday morning, 7 March, and
return to Gainesville on Friday evening, 10 March. Tour enrollment will be limited to 30
participants.
For more information, contact Ms. Abbie Fox, Institute Facilitator
at 352-392-1928, ext. 235 or by e-mail at ajfox@gnv.ifas.ufl.edu
Periodic updated information is available on the homepage of the Horticultural
Sciences Department, University of Florida at: www.hos.ufl.edu
.
This program is co-sponsored by the Horticultural Sciences
Department and the Cooperative Extension Service, University of Florida; and by the
Florida Fruit and Vegetable Association, Orlando.
(Sargent, Vegetarian 99-12)
Halosulfuron (Sempra) Labeled on Sweet Corn
Halosulfuron (Sempra) has received labeling for use on sweet corn,
field corn, field corn grown for seed, grain sorghum (milo), popcorn, sugarcane, fallow
ground, rice, turf grass sod, seed farms, and tree nuts (almonds, beechnuts, Brazil nuts,
butternuts, cashews, chestnuts, chinquapins, filberts, hickory nuts, macadamia nuts,
pecans, pistachios, and walnuts (black and English).
For sweet corn used alone, Sempra may be applied over-the-top or with
drop nozzles from the spike through layby stage of corn.
Applications of b
ounces by weight (0.032 pounds active ingredient) per acre broadcast over-the-top of corn
or with drop nozzles may be made. If necessary a sequential treatment at b oz product may be applied only with drop
nozzles semi-directed or directed to avoid application into the corn whorl. No more than 2
applications of Sempra may be made per year in sweet corn.
Avoid cultivation for at least 7 days following applications. Sempra is
extremely active in the control of yellow and purple nutsedges postemergence. Sempra will
also control common cocklebur, pigweeds, ragweeds, smartweeds and other broadleaf weeds
when applied preemergence to the weeds or when weeds are 1-9 inches tall. Consult the
label for plant back restrictions and other guidelines.
(Stall, Vegetarian 99-12)
Tillam (Pebulate) Receives Supplemental Label
Pebulate (Tillam 6-E) has received supplemental labeling for use in
transplanted tomatoes grown under polyethylene film mulch and in combination with Telone
C-17 or C-35.
Initial Tillam labeling prohibited hand transplanting tomatoes into
treated soil. Among other provisions of this label is that plants may be set by hand if
chemical resistant, Category A (waterproof) gloves are worn. Tillam may be applied as a
broadcast application prior to bed formation or as a band application to pre-beds at 2 b to 4 quarts per acre.
Do not apply Tillam 6-E in a band immediately in front of bedding discs
or other bed forming equipment. Tillam 6-E must be mixed (incorporated) into the soil
immediately after application. Inject Telone C-17 or C-35 into the bed immediately after
Tillam 6-E application. Apply polyethylene mulch over the finished bed immediately after
Tillam and Telone application.
The supplemental label must be in the possession of the user at the
time of pesticide application.
(Stall, Vegetarian 99-12)
Cabbage Variety Trial
Fourteen cabbage lines and varieties were evaluated for yield and
other characteristics when grown in central Florida during winter production. Seeds were
started in the greenhouse on October 6, 1998. Seedlings were transplanted to a Myakka fine
sand soil on November 9, 1998. A randomized block design with four replications was used
with single-row plots 25 feet long by 2.5 feet wide. In-row spacing was 9.5 inches giving
31 plants per replication. Growing conditions were excellent. Rainfall was below normal,
5.6 vs 12.6 inches, for November through February. Overhead irrigation was used when
needed to maintain crop growth. Harvesting began on February 5 with the last harvest March
1, 1999. Each entry was harvested one time when it was judged to be market mature.
Yield data and other characteristics rated in this trial are in Table 1. Green Cup is considered the standard cultivar in this trial and
should be used to make comparison for desirable traits. Eight entries yielded as high as
Green Cup. Only three were significantly lower in yield. Tropicana was the overall best
looking and yielding entry, with Green Cup a close second.
There were two red cabbage entries and both were excellent in yield,
shape, color, and size. Super Red 80 was judged slightly more uniform in plant type and
head shape than a new line, T-690 from American Takii. Overall, T-690 was more uniform and
higher yielding than most red cabbage evaluated over the past 25 years.
Table 1. Replicated cabbage trial, Sanford, FL, 1998-99.
Entry |
Source |
Days to harvest |
Yield/acrev |
Head |
Uniformityw |
Core length (cm) |
Head |
Plant colorz |
||||
Crates |
Cwt |
Wt. (lb) |
% Cut |
plant |
head |
shapex |
covery |
|||||
| Tropicana | Petoseed |
98 |
1530.9 a |
7652.8 a |
3.75 b |
66.1 ab |
5 |
5 |
7.87 |
F |
5 |
G |
| Cheers | Am.Takii |
98 |
1476.5 a |
7381.0 a |
3.42 bc |
70.4 a |
5 |
3 |
7.08 |
R |
5 |
G |
| RCB 28 | Novartis |
92 |
1453.7 ab |
7267.1 ab |
3.60 bc |
64.0 ab |
3 |
4 |
7.70 |
R |
5 |
G |
| Bejo 1772 | Bejo |
112 |
1439.3 ab |
7195.1 ab |
4.33 a |
57.3 ab |
2 |
2 |
7.50 |
SR |
5 |
G |
| RCB 26 Novartis | Novartis |
92 |
1394.3 a-c |
6969.8 a-c |
3.29 b-d |
69.7 a |
4 |
4 |
5.50 |
SPR |
4 |
G |
| Gideon F1 | Bejo |
106 |
1288.8 a-c |
6442.4 a-c |
3.28 b-d |
65.1 ab |
5 |
3 |
6.75 |
R |
5 |
G |
| Green Cup | Am.Takii |
98 |
1280.9 a-c |
6402.9 a-c |
3.20 cd |
64.2 ab |
5 |
5 |
7.00 |
RFT |
5 |
G |
| Augusta | Novartis |
98 |
1232.1 a-c |
6158.9 a-c |
2.85 de |
69.9 a |
3 |
4 |
7.58 |
R |
5 |
G |
| Ramada F1 | Bejo |
106 |
1152.6 b-d |
5761.7 b-d |
3.44 bc |
54.0 a-c |
4 |
3 |
6.79 |
R |
5 |
G |
| RCB 25 | Novartis |
92 |
1122.8 cd |
5613.0 cd |
3.28 b-d |
57.1 ab |
4 |
3 |
5.79 |
R |
5 |
G |
| Bobcat | Reeds |
98 |
1110.3 cd |
5550.2 cd |
3.24 b-d |
55.8 a-c |
4 |
4 |
5.79 |
R |
5 |
G |
| CXB 93256 | Reeds |
112 |
870.9 de |
4353.8 de |
3.41 bc |
41.3 c |
2 |
2 |
7.33 |
SR |
4 |
BG |
| Super Red 80 | Reeds |
106 |
728.3 e |
3840.5 e |
2.49 e |
50.7 bc |
5 |
4 |
6.17 |
R |
5 |
R |
| T-690 | Am.Takii |
106 |
637.6 e |
3187.5 e |
2.58 e |
41.1 c |
4 |
3 |
5.87 |
R |
4 |
R |
| vMean separation in columns by Duncans
Multiple Range Test, 0.05 level. Wuniformity: 1 = not good; 3 = acceptable; 5 = excellent. xHead shape: F = flat; R = round; SR = semi-round; SPR = slightly pointed/round; RFT = round with flat top. Yhead cover: 1 = not good; 3 = acceptable; 5 = excellent. Zplant color: G = green; R = red; BG = blue-green. |
||||||||||||
(White, Vegetarian 99-12)
Jim Stephens, State Specialist, Vegetables, was in Biloxi, MS, on a
NJHA boat tour to Kings Island, when he heard about the program from Robert Wearne,
Federal Extension Service, in a conversation on the boat in Oct, 1975. Upon return to
Gainesville, Jim wrote a letter to Wearne asking for info on the Master Gardener program,
so he could tell agents about it at agent training, Jan 21-22, 1976. (Has letter of Nov.
19, 1975.)
In July, 1977, Stephens went with Bob Black and Julian Sauls to
Washington State to review the Master Gardener program, and to Oregon.
Events by Year
1972
Dr. David Gibby, King County Hort agent, conceived idea and put MGs in clinics. In
Florida, Extension begins Florida Seed and Garden Supply Association (FSGSA)
training meetings around state.
1973
Dr. Bernie Wesenberg, WSU Hort Specialist, held his first classes for Puget Sound area.
1974
Susan Gray begins Sep. 16 in Vegetable Crops Dept with Jim Stephens (4H and gardening).
Dr. App was Manatee Co Ext Dir we held a FSGSA training meeting in Palmetto with
him.
1975
Stephens hears about the MG program from Dr. Wearne, Federal Hort leader, in Biloxi while
on NJHA tour boat in early November.
Dr. App becomes District Ext Director
1976
Stephens informs agents about program during Co Agent Training session in Tallahassee in
January.
Dr. App now becomes Assistant Dean, is interested in the MG program for Florida.
Stephens and other IFAS specialists still conducting Seed and Garden Supply training.
1977
Dr. App sends Hort Specialists Jim Stephens, Bob Black, and Julian Sauls in July to
Seattle, Washington and Eugene, Oregon to investigate the MG program.
1978
FSGSA meetings in Tallahassee and Palmetto. A home Hort Agents School was held in
Gainesville.
Dr. Joe Vandermark, retired Illinois Extension specialist with MG experience, was hired to
help us start our Fla MG program, and we had a 3-day planning meeting December 18-20.
1979
Florida MG Pilot Project began. Susan Gray, VC Extension Assistant, became first
coordinator, with Vandermark consultant, and Home Hort Committee conducting.
Three counties selected in Pilot Project: Brevard, Dade, and Manatee.
Training by State Specialists: Sept. 4, 1979 (Stephens had week 3, Sept. 18) 3 classes:
Brevard (22); Dade (15): Manatee (21) State total: 3 counties (58)
1980
3 new 1st classes: Hillsborough (24); Polk (10); Volusia (17). More classes in
Dade and Manatee. State total: 6 counties.
1981
3 new classes: Lake (17); Orange (15); Osceola (19). State total: 9 More classes in:
Brevard, Dade, and Hillsborough - total 6 counties training.
Held 1st Annual Advanced training in Gainesville.
1982
7 new 1st classes: Alachua, Broward, Leon, Marion, Palm Beach, Pasco, Pinellas.
Ann McDonald, grad student in Vegetable Crops, (2-82) became Florida state MG coordinator
Lake Yale meeting where slide sets were presented by specialists to agents.
11 counties trained in 1982. (State total: 16 counties)
1983
10 new 1st classes: Baker, Charlotte, Clay, Duval, Indian River, Lee, Martin,
Putnam, St. Johns, and St. Lucie. (State total: 26 counties)
1984
7 new 1st classes: Citrus, Collier, Escambia, Flagler, Hernando, Highlands,
Seminole. (State total: 33 counties.)
Kathleen Delate joined Vegetable Crops Dept as graduate student and state MG coordinator
with Jim Stephens.
4th Annual State MG Advanced Training, Aug 29-30, Reitz Union, Awards ceremony
in Livestock Pavilion (the infamous "Fly-on-chicken" BBQ). Attended by 167 MGs
from 22 counties.
1985
Monroe, Hendry, and Okeechobee (state total: 36 counties)
1986
Bradford (state total: 37 counties)
Kathleen Delate left IFAS with MS for Berkley.
MG program moved to Environmental Horticulture Department
1987
No new counties in 1987
Jim Stephens acted as state coordinator until Kathleen Ruppert came on.
1988
Bob Black and Kathleen Ruppert coordinated the program.
1988-1999
After 20 years there are about 45 counties with the program. Kathleen served until Joan
Bradshaw, who left in 1999, then Sonja Skelly, and beginning December, 1999 Tom Wichman
from Orange County Extension.
(Stephens, Vegetarian 99-11)
Extension Vegetable Crops Specialists
| Daniel J. Cantliffe Professor and Chairman, Horticultural Sciences Department |
Mark A. Ritenour Assistant Professor |
Timothy E. Crocker |
Ronald W. Rice Assistant Professor |
| John Duvall Assistant Professor |
Steven A. Sargent Professor |
| Betsy M. Lamb Assistant Professor |
William M. Stall Professor |
| Yuncong Li Assistant Professor |
James M. Stephens Professor and Editor |
| Donald N. Maynard Professor |
Charles S. Vavrina Associate Professor |
| Stephen M. Olson Professor |
James M. White Associate Professor |