Group Title: Berry/vegetable times.
Title: Berry/vegetable times. December 2005.
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 Material Information
Title: Berry/vegetable times. December 2005.
Uniform Title: Berry/vegetable times.
Physical Description: Newspaper
Creator: Gulf Coast Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida
Publisher: Gulf Coast Research and Education Center, University of Florida
Gulf Coast Research and Education Center
Publication Date: December 2005
 Record Information
Bibliographic ID: UF00087388
Volume ID: VID00040
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.


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December 2005

A monthly newsletter of the University of Florida IFAS
Florida Cooperative Extension Service,
Hillsborough County
5339 CR 579, Seffner, FL 33584
(813) 744-5519 SC 541-5772
AliciaWhidden, Editor Mary Chernesky, Director
Gulf Coast Research and Education Center
14625 County Road 672, Wimauma, FL 33598
Christine Cooley, Layout and Design
Craig K. Chandler, Co-Editor
Jack Rechcigl, Center Director

From Your Agent...
Upcoming Grower Meetings

In the next 2 months there are three grower meetings
scheduled. Two are for growers in our area and the third is
more regional in scope. The first one will be the Cucurbit
Production Workshop on Dec. 8 at GCREC in Balm. This is
a broad topic to cover in an afternoon but we will be covering
all aspects of growing squashes, melons and cukes and the
problems you might be having.. The auditorium will be
divided with talks on one side starting at 1:30 and the other
side will be a trade show. There will be a break so you will
have time to visit with the vendors and have refreshments.
Vendors will be available to talk with you before and after the
talks also. A schedule of the talks is at the back of the
newsletter. Please RSVP if possible just so we will an idea of
(Continued on page 2)

Intrepid 2F Insecticide Registered for
Armyworms in Strawberry
Jim Price and Curtis Nagle

Dow AgroSciences has registered Intrepid' 2F
methoxyfenozide for armyworm and corn earworm control in
strawberries. This action was taken via a supplemental
labeling procedure under the specimen label for certain fruits,
nuts and vegetables. This product is unlike any other used in
strawberries and represents an effective complement to other
good caterpillar insecticides now available. Methoxyfenozide
has very little effect on other arthropod groups so it will be
compatible with sound IPM practices that encourage activities
by beneficial insects and mites. Its use for armyworms and
corn earworms will not disrupt biological control of spider
mites by Phytoseiulus persimilis or Neoseiulus californicus.

(Continued on page 2)

IFAS is an Equal Employment Opportumnty Affirmative Action Employer authored to provide research, educational information and other services only to individuals and institutions that
function without regard to race, color, sex, age, handicap, or national origin U S Department of Agnculture, Cooperative Extension Service, University of Flonda, IFAS, Florida A & M
University Cooperative Extension Program, and Boards of the County Commissioners Cooperating

December 2005

BerryNegetable Times

Berry/Vegetable Times

(Continued-Grower's Meetings)
the number who will be attending but even if
you don't RSVP you can still join us on Dec.
8. CEUs and CCA credits will be available.
The regional meeting for growers will
be held in the lovely town of Savannah,
Georgia from January 4-7and will have talks
on many crops. Part of the meeting is the
North American Berry Conference which will
be held January 4-6; this includes the North
American Strawberry Growers Association
(NASGA) Annual Meeting. Then from
January 5-7 the 2006 Southeast Regional Fruit
and Vegetable Winter Conference will also be
going on. This is being billed as the largest
educational conference and trade show to be
held in the southeast. The conference includes
the Georgia Fruit & Vegetable Association,
Georgia Peach Council, Georgian Blueberry
Growers Association, Georgia Strawberry
Association, Georgia Muscadine Association,
NASGA, North American Bramble Growers
Association, South Carolina Strawberry
Association and many others. The joint
meeting will be held at the Savannah
International Trade and Convention Center.
For more information, go to
The third meeting will be the Frost/
Freeze Protection Workshop for Strawberry,
Blueberry and Ornamental Nursery
Operations. This will be held at the
Hillsborough Extension Office at 5339 CR 579
in Seffner on Jan.25. It will start at 11:00 and
last till approximately 4:30. Lunch will be
provided so please RSVP to me at 813-
74405519, ext. 134.

Have a great holiday season!
Alicia Whidden
813-744-5519, ext. 134

The label states that Intrepid 2F is for
early season application only to young crops
and small plants. Plant City area caterpillar
problems are usually greatest during this
period. The product must be ingested by the
caterpillar in order to function, so thorough
plant coverage when caterpillars are feeding is
Methoxyfenozide is an insect growth
regulator that causes target caterpillars to go
through an incomplete, lethal molt. It can be
sprayed at 6-12 ounces of formulated product
per acre per application but is restricted to a
maximum of 64 ounces per acre during one
season. Feeding and other activity ceases soon
after the caterpillar ingests the toxicant but the
insect may not die for several days.
A 4 hour re-entry interval and a 3 day
pre-harvest interval must elapse between
application and re-entry or harvest. Any food
and feed crop can be planted in treated areas 7
days after the last application.
The availability of Intrepid' 2F can be
particularly important to strawberry farmers
using predatory mites who experience early
season armyworm problems and wish to
reserve allotted SpinTor or Entrust' for later
thrips management. Strawberry farmers can
expect good control of armyworms and corn
earworms when this product is applied
according to label instructions.

The use of trade names in this publication is
solely for the purpose ofproviding specific
information. It is not a guarantee or war-
ranty of theproducts names and does not
signify that they are approved to the exclu-
sion of others of suitable composition.
Use pesticides safely.
Read and follow directions on the
manufacturer's label

December 2005

Berry/egetable Times

Nuffield Farming Scholar Visits
Craig Chandler
David Northcroft, recipient of a 2005
Nuffield Farming Scholarship, recently visited
GCREC to learn more about the Florida
strawberry industry and the center's strawberry
research and extension programs. The
Nuffield Farming Scholarships Trust was
established in Great Britain in 1947, and is
dedicated to the promotion of plant and animal
agriculture, forestry, and rural lands
management education. The Trust does this
primarily through scholarships. These
scholarships make it possible for recipients to
travel to other parts of the world to learn about
practices and techniques that relate to their
chosen agricultural topic of study. Scholars
must write a report at the completion of their
travels, and summaries of these reports are
available on the Trust's web site Funded by the
agriculture and food industry, charities and
trusts with agricultural objectives, and past
Scholars themselves, the Trust makes about 20
new awards each year.
Northcroft, an engaging and bright
young man who has a masters degree in crop
plant health, has chosen as his topic
"Responding to consumer pressures in soft
fruit [strawberry, raspberry, blackberry, and
blueberry] production". Northcroft's first stop
on his 80 day, round the world trip, was the
Dover/Plant City area, where he met with
growers, shippers, technical reps, and FSGA
executive director Chip Hinton. Then, after
spending a day at GCREC, he was off to learn
about how soft fruits are produced and
marketed in Oregon, California, Australia, and
Northcroft works for KG Growers Ltd.,
a growers cooperative based in England. KG
Growers is the United Kingdom's largest soft
and stone fruit cooperative, with over 70
growers providing about 50% of the soft fruit
marketed in the UK.

Phytophthora crown rot vs.
Colletotrichum crown rot
Natalia Peres and James Mertely

Phytophthora crown rot produces a
sudden wilt of plants in strawberry fields. This
disease is caused mainly by the species
Phytophthora cactorum, although P. citricola
has also been reported. The wilt and crown rot
symptoms are difficult to distinguish from
those produced by Colletotrichum crown rot
(caused by Colletotrichum gloeosporioides)
(Figs. 1 and 2). Thus, it is necessary to make
isolations of the fungus from recently infected
plants for identification of the pathogen.
Phytophthora crown rot, as well as
Colletotrichum crown rot, is favored by warm
temperatures and prolonged periods of
wetness, conditions that are typically observed
during the plant establishment period in
Florida. The inoculum of Phytophthora does
not persist in infested soil and plant debris
during the hot summer in Florida and
fumigation with methyl bromide (as long as is
still available) and chloropicrin help to prevent
the disease. Thus, in Florida, the primary
source for Phytophthora crown rot is infected
transplants. Cultivars vary considerably in
resistance to Phytophthora crown rot, however
little research has been done under Florida
Although symptoms are similar, control
measures for Phythopthora and Colletotrichum
crown rots are distinct. In order to prevent
Phytophthora epidemics in fruit production
fields, mefenoxam (Ridomil Gold), fosetyl-
aluminum (Aliette) or phosphite products
should be applied preventively or as soon as
the disease is found in the field. Ridomil
Gold can be applied as a foliar spray or
through the drip irrigation system from plant
establishment period and until the plants
flower. Fosetyl-aluminum and the phosphite
materials also can be applied during the
season, when Ridomil applications are not
permitted. If the problem is Colletotrichum

December 2005

Berry/egetable Times

crown rot, foliar sprays of Captan or Topsin
should be applied to prevent spread of the
Growers are encouraged to submit
samples of crown rot affected plants for
diagnosis at the GCREC Diagnostic Clinic
prior to making applications for disease
control. For more information, consult our
website at
For information regarding
Colletotrichum crown rot control, consult our
article in the May issue of the Berry Times.

Fig. 1. Crown symptoms of Phytophthora
crown rot.

Fig. 2. Crown symptoms of Colletotrichum
crown rot.

GCREC to Host North Carolina
Strawberry Growers Association
Christine Cooley

Upcoming in January 2006, the North
Carolina Strawberry Association is
sponsoring an opportunity to visit strawberry
growers in Florida to see how they handle
growing, picking, packing, and marketing of
their berries. They will get to interact with
these growers and see the equipment they use
on their farms. They also plan to visit the
Gulf Coast Research and Education Center
as well as research at the Florida Strawberry
Growers Association's new educational
facilities, which is located at the former
Dover Research Center. The participants will
have the rare opportunity, as a small group of
about 50, to see and learn from some of the
top strawberry professionals on the East
During their visit to GCREC, the
association members will tour the strawberry
fields, grading rooms and laboratories.
Several faculty members will be giving
presentations on topics of interest such as
mites, methyl bromide and strawberry
GCREC welcomes the opportunity to
share research and information on the
commodities grown and studied here at
GCREC. For tour information, call the
center at (813) 634-0000, Ext. 3101 or visit
the website at

For your information, GCREC will be
closed from December 25 through
January 2nd. We will resume regular
working hours on Tuesday, January 3rd.

December 2005

December 2005

Cucurbit Production Workshop
Thursday, December 8, 2005
Gulf Coast Research & Education Center, Balm

If you grow watermelons, cantaloupe, squash or cucumbers, this meeting is a must.
Learn about current pest problems, new control measures, varieties and irrigation/
fertilizer management. Visit with vendor/sponsors to learn more about the latest con-
trol materials and what's coming for the future.


1:30 pm Cucurbit virus and insect problems. New control materials.
Dr. Susan Webb, UF/IFAS, Extension Entomologist, Gainesville
1:55 pm Major cucurbit diseases and control measures. Watermelon vine
decline update.
Dr. Pam Roberts, UF/IFAS, Pathologist, SWFREC, Immokalee
2:20 pm Nematode problems in cucurbits. Life after methyl bromide?
Dr. Joe Noling, UF/IFAS, Nematologist, CREC, Lake Alfred
2:40 pm Weeds, weed competition and weed control.
Dr. Bill Stall, UF/IFAS, Extension Weed Specialist, Gainesville
3:00 pm Break Enjoy refreshments and visit with vendors.
3:30 pm Fertilizer and irrigation management for cucurbits, including dou-
Dr. Eric Simonne, UF/IFAS, Extension Specialist, Gainesville
3:50 pm Personal melons, melon pollinizers and new melon varieties.
Dr. Don Maynard, UF/IFAS, Professor Emeritus, GCREC, Balm
4:10 pm Squash, cantaloupe and cucumber variety update.
Alicia Whidden, UF/IFAS, Extension Agent, Hillsborough County
4:30 pm Adjourn, visit with vendors

Meeting is free. Pre-registration is requested.
Please call Alicia at 813-744-5519 or Phyllis at 941-722-4524.
2 CEUs and 2.5 CCA credits have been approved.

Berry/egetable Times

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