Group Title: Agronomy Notes
Title: Agronomy notes
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 Material Information
Title: Agronomy notes
Uniform Title: Agronomy notes (Gainesville, Fl.)
Physical Description: v. : ill. ; 28 cm.
Language: English
Creator: Agronomy Department
Florida Cooperative Extension Service
Publisher: Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida
Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida.
Place of Publication: Gainesville
Publication Date: November 2010
Subject: Crops and soils -- Florida   ( lcsh )
Crop yields -- Florida   ( lcsh )
Agriculture -- Florida   ( lcsh )
Agronomy -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
periodical   ( marcgt )
Statement of Responsibility: Florida Cooperative Extension Service, University of Florida, Institute of Food and Agricultural Sciences.
Additional Physical Form: Also available to subscribers via the World Wide Web.
Additional Physical Form: Electronic reproduction of copy from George A. Smathers Libraries, University of Florida also available.
General Note: Description based on: January 1971; title from caption.
 Record Information
Bibliographic ID: UF00066352
Volume ID: VID00129
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: alephbibnum - 000956365
notis - AER9014

Full Text

IFAS Extension

-9 0e 201 01 *

S 0- S S S


Soybean Rust Update........................................ Page 2
Use Recommended S; ,'.. Grain Varieties......... Page 3


Excess Hay: To Feed or To Store .................... Page 3

Weed: Control:
Weed Control in Overseeded Pastures ................. Page 4


*--- ,

Looking for Information on Pesticide Tolerance... Page 2
Soil test for Nematodes and Fertility
Status in the Fall....................................... Page 5
Operation Cleansweep 2010-2011 ...... ......... Page 5
Calendar ........................ ....... ................. Page 6

The Institute of Food and Agricultural Sciences (IFAS) is an Equal Employment Opportunity-Affirmative Action Employer authorized 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. For information on obtaining other extension publications, contact your county Cooperative Extension Office. Florida Cooperative
Extension Service/Institute of Food and Agricultural Sciences/University of Florida/Millie Ferrer-Chancy, Interim Dean.

"Agronomy Notes" is prepared by: Maria Gallo, Interim Chair and Y. Newman, Extension Forage Specialist -. .. I ..I 1. J. Ferrell, Extension
Weed Specialist Il. 'i. Ii. ,!,I .1.h,. Fred Fishel . .II..t .Ii.J. Marois, Plant Pathologist i" '-i -.t ,. !I .1.. I D. Wright, Extension Agronomist
i i_ i. I .1.. I1. The use of trade names does not constitute a guarantee or warrant of products named and does not signify approval to the exclusion of
similar products.

Crops Dr. David Wrght, Extension Agronomist
North Florida REC, Quincy
Dr. Jim Marois, Plant Pathologist

Soybean Rust Update
Asian soybean rust (ASR) has been slow to establish in 2010 due to the cold winter and lack of host plant
(kudzu) for an extended period of time. We
have monitored sentinel plots throughout the
season and as well as kudzu patches that have
had the disease in the past few years. Dry
weather in late August, September, and
October and the lack of ASR spores have kept
the disease in check. No commercial fields of
soybeans have been confirmed with ASR this
year unlike in the past 2-3 years. Most
commercial fields in Florida were sprayed and
apparently due to high soybean prices and
other diseases that are normally prevalent.
Asian soybean rust has stayed in the south this
year being found in a few kudzu patches. No
other legumes or plants have been found to
have rust. Fungicide trials are being conducted
for ASR control and breeding work from the
mid-west states is still in full swing. Growers
will want to keep an eye on the disease in the
future if the inoculum builds up to the previous
years level. Disease incidence had been
increasing about 20% per year in about 80
increasing about h20 per year in about 80 Soybeans above grown in shade have thinner cuticles and more soybean rust.
kudzu sites that had been monitored each year Photo by David Wright.
since 2006.

Pesticides Dr. Fred Fishel, Pesticide Information Director

Looking for Information on Pesticide Tolerances?

EPA has updated an online tool that allows users to easily search for pesticide tolerance information on food and
feed commodities. Users can now locate the Code of Federal Regulations (CFR) section numbers (for example
180.220 for atrazine) to determine whether a pesticide ingredient has a permanent tolerance or exemption from
the requirement of a tolerance by the pesticide common name (e.g., dicamba, thidiazuron) or by pesticide type
and family (e.g., acaricide, carbamate family). The index contains the following information for each chemical:

+ 40 CFR part 180 section
+ Chemical Abstracts Service (CAS) registry number and name
+ Pesticide type and family
+ EPA pesticide chemical (PC) code
+ Tolerance-specific information about pesticide chemicals and crop groups by commodity, crop group, or crop subgroup

This new tool can be found at l/regulating/part-180.html and will be updated yearly.

rfOps Dr. David Wright, Extension Agronomist
North Florida REC, Quing

Use Recommended Small Grain Varieties

For those growers who have been checking on small grain seed for grain or forage, you know that seed supplies
are tight this year. Prices are up and last falls planting season was too wet to get much small grain planted.
This led to a shortage of seed of good varieties for this fall with prices at a near all-time record. Select
recommended varieties when planting to get highest yields of grain or forage. Generally, November is the time
to plant small grain for highest grain yields. Small grain for forage can be planted earlier. Recommended
planted date for grain is Nov. 15- Dec. 15 and care has to be taken in planting some varieties late if they have a
high vernalization requirement. Check variety trial lists at for yields. Some of the
Florida results are listed in these trials.

Forages Dr. Yoana Newman, Extension Forage Specialist

Excess Hay... To Sell or to Store ?

With the excess hay we currently have in Florida, the question is: should I plan on selling, or should I keep it?

Although it may seem that we have a surplus, we may just have enough supply to withstand developing drought
conditions. If planning on selling, and depending on your operation type, consider the latest reports on weather
forecast from climatologist and
meteorologists. These scientists are
predicting a stronger than usual La
Nifia year, which means cooling
waters in the pacific ocean that have
a warming and drying effect for
Florida's winter and spring seasons.

Drying conditions are associated .
with failed winter ryegrass that is J "
rain fed, because the high moisture /
demands of this crop are not met. It
is also associated with overgrazing
of pastures, high demands for hay,
and hay supply that shrinks very

What happens when hay is in high
supply? Usually, prices are low but
they will be hiking as the demand
increases. What may be an excess Most Hay growers are having a surplus of hay this year.
now can turn into an opportunity to
market hay when prices increase.

Weed Science

Dr. Jason Ferrell, Extension Weed Spe-

Weed Control in Overseeded Pastures

Many cattle producers plant temporary grazing
areas with ryegrass, wheat, oats, or other small
grain varieties since pastures will soon be
dormant. A successful winter pasture can be a
highly productive and somewhat inexpensive
way to improve animal performance during the
winter months. However, many do not
consider weed management as an important
part of winter pasture production. This often
results in rampant infestations of wild radish
(aka wild mustard), geranium, and other winter

Control of winter weeds is relatively
inexpensive and easy if it is done in a timely
manner. Wild radish seeds begin to germinate
when soil temperatures reach 65 F. As
temperatures begin to decline, it is important to
begin scouting the winter pasture areas to
determine your level of winter weed infestation
and plan your herbicide application timing.

For small wild radish, 1 pint of 2,4-D ester will
provide near 100% control if it is applied prior
to flowering when rosettes are small. Delaying
the application until the plants are fully
flowering and large will result in less than 50%
control. Other herbicides such as Banvel and
Weedmaster may be used, but these will also
be ineffective on large weeds.

Timing the herbicide application relative to the
winter pasture should also be considered.
Applications made soon after emergence will
cause significant leaf rolling and yellowing.
Applications made too late can cause lodging

S . . -

"* ' ",* ", " ,

Top: Wild radish at rosette when at appropriate time to control. Bottom: Wild
radish at bolt, reduces herbicide control by 50%.
.... I.-
r . tr,.. d""


Top: Wild radish at rosette when at appropriate time to control. Bottom: Wild
radish at bolt, reduces herbicide control by 50%.

and additional injury symptoms. Therefore, Photo by Jason Ferrell
herbicides should be applied after the plants
have fully emerged and begun to tiller, but prior to head formation. Additionally, application rates of 2,4-D,
Banvel, or Weedmaster should not exceed 1 pt/A. But if the weeds appropriately small, 1 pt/A will be more than
enough herbicide to provide effective control.


Miscellaneous Dr. David Wright, Extension Agronomist
N ortfh londa KfiC, fuzncy

Soil Test for Nematodes and Fertility Status in the Fall

Soil tests taken immediately after harvest of cotton or peanut can be used to determine lime as well as fertility
requirements for crops for the coming year. If areas of the field did not yield as well as expected, compare those
samples to those that did well. Fall of the year is a good time to lime before soils get saturated. This will allow
time for soil reaction creating a change in pH for the next crops. Although some reactions occur slowly, this
doesn't mean that applications should be delayed if planting season is near. Bacteria that fix nitrogen for legumes
do better and form more nodules with an adequate calcium level and with pH of 6.0 or higher.

Pesticides Dr. Fred Fishel, Pesticide Information Director

Operation Cleansweep 2010-2011

Between November 2009 and June 2010, Operation Cleansweep provided pickup and disposal service to 62
participants in 26 counties and collected more than 103,000 pounds of cancelled, suspended and unusable
pesticides for proper disposal.

Operation Cleansweep, which previously has been a free service to pesticide users, was not funded by the
Legislature for State Fiscal Year 2010-2011 (July 1, 2010 June 30, 2011). As a result, Operation Cleansweep
will not be a free service this year. However, the state disposal pricing contract is still in effect and will be honored
by the contractor for any pesticide user who wants to take advantage of this greatly reduced price for disposal. The
state contract price for disposal of pesticides is $0.89 per pound ($100 minimum per participant).

The Florida Department of Agriculture and Consumer Services (FDACS), with the help of UF/IFAS Extension
agents, county solid waste personnel, product dealers and trade associations, will collect names, addresses,
quantities and types of cancelled, suspended and unusable pesticides from participants and verify this information.
When the FDACS have a sufficient quantity of product in a defined area, the contractor will be dispatched to each
participant's farm or business facility to package, transport and dispose of cancelled suspended and unusable
pesticides. A flyer provides details and instructions on how to sign up for this reduced "state contract" price pick-
up service: topics/publications/shw/cleansweep-pesticides/
CleansweepFlyerSep2010.pdf. Contact either Robin Waddell at Cleansweep( of the FDACS or
call toll-free at 877-851-5285 to sign up. Pick-up collection and disposal services are expected to begin in the
winter of 2010-2011.


To follow the link, press "Ctrl" and put cursor over link, and "click."

Nov. 10

Nov. 12

Nov. 16-18

Nov. 18

Dec. 16-17

Jan. 20

2010 Florida Ag Expo, Balm (Gulf Coast REC)

Advanced Topics in Hydroponics, Live Oak (North Florida REC)

Tomato Disease Workshop, Balm (Gulf Coast REC)

Cow/Calf BMPs Field Day, Cherokee Ranch, Marianna, FL

Drip Irrigation School, Live Oak (North Florida REC)

UF/IFAS Cattlemen's Institute and Allied Trade Show, Kissimmee


FIF Gul Cos Reeac adEu tionCne

pappy thanksgiving!


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