Title: Blueberry news
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Permanent Link: http://ufdc.ufl.edu/UF00089445/00007
 Material Information
Title: Blueberry news
Series Title: Blueberry news
Physical Description: Serial
Creator: Florida Blueberry Growers' Association
Publisher: Florida Blueberry Growers' Association
Publication Date: Winter 2001
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Bibliographic ID: UF00089445
Volume ID: VID00007
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.


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Official Newsletter of the Florida Blueberry Growers

The Blueberry News
Official Newsletter of the Florida Blueberry Growers' Association
Winter Issue, 2001

Editor: Jeff Williamson (Professor, Horticultural Science Department, IFAS, University of Florida)

Officers: Jerry Mixon, Jr. (president), Dean Deihl (vice president), Sheri Brothers (secretary and treasurer),
Jeff Williamson (educational program director and newsletter editor).

Board of Directors: Jerry Mixon, Jr., Dean Deihl, Ken Patterson, Jimmy Miller, Gerald Mixon, Bob Payne,
Steve Blount and Paul Lyrene.

Disclaimer: The information in this newsletter was selected with good intentions by the editor. It does not necessarily reflect the
opinions of the editor, the Florida Blueberry Growers' Association or the Association Directors. The reader should not assume that
the information presented in the newsletter is being recommended for his or her farm. Especially where pesticides or growth
regulators are mentioned, be sure to follow their labels exactly. If you have comments, corrections, or suggestions regarding the
newsletter, please write to the editor


Happy holidays to you and your families!This is our final newsletter for 2001 so I wanted to review some of the
developments in Florida blueberries over the past year.

First, congratulations to our "northern" neighbors in Georgia with the forming of their new Georgia Blueberry
Grower's Association. Next, congratulations to all Florida blueberry growers for our record setting year. Per
USDA, we shipped in our Florida window 2.3 million pounds of fresh blueberries.

We were made aware of several new "pests" -- gall midges and thrips. Although their presence in Florida is
not new per se, the information concerning their importance and negative impact to the Florida blueberry
harvest numbers and how to combat them is new.

We have been made aware of increasing potential for more encroachment to our market window both here at
home (USA) and abroad. In addition, we have lost Benlate, one of our key weapons in battling certain fungal
diseases in blueberries.

Who could recap our year without mentioning the horror of September 11? The impact of these tragedies on
our personal lives as well as our business of growing blueberries is still being determined. One of the potential
results of September 11, 2001 will be decreased funding for University of Florida Extension programs including
those with blueberries. We will be asked as an Association to assist with increased funding for research
projects that Jeff and others are and will be working on. How will we accomplish this? The most effective way
will be through increased participation in the Association. We need to step up our efforts in membership
recruiting and participate in active fund raising opportunities such as the purchase of FBGA shirts (ten dollars
per shirt goes to the Association) and raffle tickets at FBGA meetings. There will be a new and exciting fund
raising opportunity at the spring meeting.

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The Blueberry News

Official Newsletter of the Florida Blueberry Growers

If we can do these things we should not see a drop off in the things being done on our behalf regarding
research and extension in blueberry production.

In conclusion, let's be on our toes in cold/frost protection and do all we can as growers to produce the finest
quality blueberries, not only in Florida but throughout the world, and our future should continue to be bright.

Finally, my prayer for you and yours is to have a safe and blessed holiday season and that the Lord would
bless our efforts in the coming season.

Jerry Mixon, Jr
Mixon Family Farm and FBGA President

Meet Bob Payne: Featured Blueberry Grower

Bob Payne is a south Florida blueberry grower and owner of Payne's Blueberry farm in Sebring. He is a long
time member of the FBGA and has been active in our association in many different capacities. Bob is our
"featured grower" for this issue of Blueberry News. Below is his article.

Payne's blueberry farm is located in Sebring, Florida which means we receive a lot less chill hours than our
north Florida friends. The varieties that we grow are mainly 'Sharpblue', 'Sapphire', and numerous test
selections. We do not use pine bark because of its high cost and because our soil is between 1 and 3 %
organic matter. We currently plant on a 3 by 9 foot spacing, or 1600 plants per acre. We are working with Dr.
Paul Lyrene to find some new varieties that will work in central Florida. Dr. Paul will evaluate the fruit of the
first planting this year and hopefully, there might be something promising in the years to come.

Something we have done on our farm that has helped control the deer is to build a fence. We have used
woven wire on the bottom four feet and strung seven strands of barb wire above the woven wire to discourage
the deer from jumping over. The total height of the fence is about eight feet. The posts are 20 feet apart with
every other one being a 10 foot post. The other posts are the standard 6.5 feet long. The barb wire should be
of the gaucho type with barbs every four inches. This has worked pretty well for us during the past 10 or so
years. The woven wire keeps the does from teaching the fawns that the blueberries are a good food source
and after a few years the new generations do not realize what they are missing. The deer will try to go through
the strands a few times but the gaucho really persuades them that there is a better source of food than our
berry farm. This is not 100 % effective for the first couple of years and when deer get in if a dog chases them,
they will get the message. This has been the most cost effective project that we have done to increase yields
on our farm.

Using Dormex in Florida Blueberries

by Jeff Williamson

Dormex (hydrogen cyanamide) is a plant growth regulator that became available for commercial use in Florida
blueberries last year. To date, our experiments, and grower experience, have shown Dormex to be a useful
tool for stimulating earlier and stronger spring leafing of several southern highbush (and Climax rabbiteye)
cultivars in Florida. Where spring leafing has been significantly advanced by Dormex, berries were often

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The Blueberry News

Official Newsletter of the Florida Blueberry Growers

harvested earlier than would otherwise be possible. Increased average berry weight (size) and a slight
increase in total yield have also been noted in some cases but the main advantage seems to be increased
earliness. Most of our research has been conducted with the cultivar 'Misty'. Increased vegetative budbreak
and earlier ripening from Dormex have been demonstrated under a range of environmental and climatic
conditions during several seasons in Florida for the variety 'Misty'. On other cultivars, growers have reported
similar though perhaps less dramatic results. Grower reports also indicate Dormex may be effective at
concentrating bloom which could improve fruit set and result in a more concentrated harvest season. The
Dormex label for Florida warns against applying Dormex to 'Sharpblue'. 'Sharpblue' flower buds appear to be
more susceptible to injury (spray burn) from Dormex than are flower buds of most other cultivars. Sharpblue is
inherently a strong spring leafing cultivar, so it may not benefit from the "Dormex response" as much as some
other cultivars. More research and experience are needed to determine if Dormex can be safely applied to the
numerous blueberry cultivars currently grown in Florida. Thus far our research has shown that Dormex can be
applied to 'Misty', 'Star', 'Southmoon', 'Gulf Coast' and 'Climax' with minimal (acceptable) levels of flower bud

What rate of Dormex should be used? If misapplied, Dormex has the potential to damage flower buds.
Therefore, it is very important that growers follow the label directions exactly. The Florida label calls for up to
1.5% (v/v) Dormex in 50 to 100 gallons of spray per acre using up to 0.5% (v/v) of one of the nonionic
surfactants, Latron B1956 or Agri-Dex. Higher Dormex spray concentrations have resulted in significant flower
bud thinning in all of our experiments and have reduced total yields. Dormex applied at 1.5 % (v/v) has
consistently shown increased leafing and earlier fruit ripening of 'Misty' without significant flower bud thinning.
Dormex applied at 1.5 % (v/v) has actually increased total yields in some cases. This is probably a result of
increased average fruit size combined with minimal, if any, fruit thinning. The effect of Dormex is very localized
on plants. Therefore thorough coverage is essential.

When should Dormex be applied? The Florida label calls for applications to be made 30 or more days prior to
natural budbreak. It appears that Dormex is most effective when applied to dormant plants after significant
winter chilling has occurred and about 30 days prior to natural budbreak. Although the calendar should not be
used to time Dormex spray applications, in Alachua County, late December is usually about 30 to 40 days
before flowering for most cultivars grown there. During the last 2 to 3 years, applications of Dormex made in
Alachua County between about December 20 and January 3 have usually increased vegetative budbreak and
advanced fruit harvest of responsive cultivars. During "normal" winters thus far, differences within this time
frame in Alachua County have not been significant. Of course the onset of dormancy, chill accumulation, and
the timing of natural budbreak will vary from year to year and from one location to another in Florida. Hence,
the timing of Dormex applications should be based on the weather and anticipated date of natural budbreak,
not the calendar date.

Application of Dormex to plants that have received little or no chilling resulted in less efficacy and more injury
to stems and flower buds emphasizing the importance of restricting application of Dormex to the dormant
period when some chilling is likely to have occurred, but before flower bud swell has progressed past stage 2
(that is before flower bud scales begin to separate). Delaying application until, or just prior to, the beginning of
flowering (usually mid- to late January in Alachua County) has resulted in serious flower bud thinning and yield
reduction. The application time for maximum benefit will depend on the winter weather and location of the site.

What Cultivars Benefit From Dormex? This is a very important question but one for which we do not have
enough data to answer completely. Our field experiments, and the 1999 Florida E.U.P. Program, evaluated
Dormex when applied to the following cultivars 'Misty', 'Climax', 'Gulf Coast', 'Star' and 'Southmoon'. No
significant flower bud injury was observed for any of these cultivars when Dormex was applied at rates of
between 1.0 and 2.0 % (v/v) to dormant plants during late December through early January in north-central
Florida. In all cases, vegetative budbreak and leafing were advanced, and in most situations, harvest date was
advanced and berry quality was improved. However, that is not to say that all cultivars respond equally to
treatment with Dormex. The cultivars which appear to respond best to Dormex are those cultivars that leaf

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The Blueberry News

Official Newsletter of the Florida Blueberry Growers

poorly in the spring such as 'Misty'.

The cultivar 'Sharpblue' has shown a higher than usual sensitivity to Dormex resulting in flower bud injury and
fruit thinning which has sometimes reduced yields. 'Sharpblue' flowers tend to be more swollen and have
slightly more open bud scales during the winter than other blueberry cultivars grown in Florida and this
difference in development and flower bud structure may account for its increased sensitivity to Dormex.

In summary, the potential benefits from Dormex when used correctly include strong spring budbreak and
vegetative growth, shorter fruit development periods with earlier harvest periods, increased average fruit weight
(size), and slight increases in total yield. It is possible that the concentrated bloom and harvest periods and
shortened fruit development periods obtained with Dormex could help with disease and insect control and
potentially reduce the number of annual pesticide applications needed in Florida blueberries.

On the other hand, when applied incorrectly, Dormex can result in flower bud injury, excessive fruit thinning
and yield reductions. Also, potential users should be aware that Dormex is classified as a restricted use
pesticide. Extreme caution should be used when handling and applying this material and ALL LABEL

Dormex orders for Florida have already been placed for this winter. If you have any questions about where or
when to pick up your order, contact Rick Hill at (813) 781-0902.


Blueberry Hill Nursery. Come by and see our plants, potted rabbiteye and highbush. We're in Salt Springs.
Call (352)685-2769 or (352)622-9190. Lic. No. 47217069.

Call the Doc! Doc Applications, Inc. is booking orders for the fall 2000 and beyond. We grow the latest
varieties including Gulfcoast, Sharpblue, Sapphire, and Emerald bare root and in containers. Call Dave Weber
(863)325-8215 for price and availability. Lic. no. 47219637.

Elixson Wood Products, Inc. Pine bark shredded, nuggets, or fines available. Ph (904) 964-6649.

Island Grove Ag. Products. Don't buy plants until you've talked to us. We have all varieties including the
new highbush releases from U of F. We will grow specifically for your needs. Call John Purcell or Ken
Patterson at (352)481-5558. Lic. no. 47217870.

Miller Blueberry Nursery. Rt. 3, Box 5700, Palatka, FL 32177, Ph.(904) 325-7373. Let us supply your
blueberry plants. All varieties. All sizes. Bare root and potted. Please call for prices. Lic. no. 04720531.

Mixon Family Farm, Inc. We have excellent quality blueberry plants for sale. We have Misty as well as all
the newest releases from the University of Florida including Sapphire, Jewel, Star and Sante Fe. We will
custom grow for your specific needs. Call Jerry Mixon (863)439-8335 for price and availability. License no.

My Blue Heaven Blueberry Nursery. Southern highbush varieties. Centrally located in Dade City. Give us a
call, we're happy to help. Debra Troyer (352) 567-4256, 18414 Lawrence Rd., Dade City, FL 33523. Lic. no.

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The Blueberry News

Official Newsletter of the Florida Blueberry Growers

Row Mulching Machine and Loader Equipment. For rent or hire. Bob Waldo, (727) 863-4214.

Southern Highbush Blueberry plants for-sale Several varieties. Call for prices and availability. Bob
Waldo, Hudson, FL (727) 863-4214. Lic. no. 47227344.

Strickland Blueberry Farms and Nursery. 4956 Slaten Rd., Plant City, FL 33567 Phone (813) 754-3866.
FAX: (813)754-8717. 'Gulfcoast' and 'Sharpblue' in 1, 15 and 25 gal. containers. Large quantities available.
Come see an alternative planting method. Lic. no. 47220729.

Florida Industrial Scale Co. Serving Central and North Florida Since 1978, Custom
Blueberry Harvest Systems. All types of scales and custom systems from laboratory balances to
truck and railroad scales. Prompt service, factory trained service technicians. Sales Rental -
Repairs. Offices in Jacksonville, Longwood and Clearwater, (904) 778- 0410 (800) 330- 7972


We welcome advertising from blueberry nurseries and suppliers. The cost is 30 cents per word per issue of
the newsletter in which your message appears. Send your blueberry-related message and a check payable to
FLORIDA BLUEBERRY GROWERS' ASSOCIATION to our address given below under membership


To join or renew your membership to the Florida Blueberry Growers Association, mail a check payable to
FLORIDA BLUEBERRY GROWERS' ASSOCIATION to our address: Florida Blueberry Growers' Association,
P.O. Box 141733, Gainesville, FL 32614.

The Association annual dues depend on which membership category you fit best.

1. Regular Florida Member $10.00 per acre of blueberries, except a minimum of $50.00 and a maximum of
2. Out-of-state member $50.00.
3. Associate member $100.00 (Equipment and chemical companies, etc.).
4. Educational and Research $10.00 (University and USDA personnel who do not grow blueberries

Related Links:

University of Florida
Institute of Food and Agricultural Sciences
Horticultural Sciences Department
Florida Cooperative Extension Service
Jeff Williamson

This page is maintained by Susie Futch zsf(mail.ifas.ufl.edu.

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The Blueberry News

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