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No. 02/April 05, 2002

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Other States' Newsletters
This article provides the URLs for newsletters published throughout the north-central states. These URLs to other states' newsletters may come in handy, especially if you want to obtain multiple perspectives about pest situations and pest management issues.

Correction: Lorsban 15G for Wireworm Control
The insecticide Lorsban 15G was incorrectly designated as a restricted use insecticide in last week's issue of the Bulletin. The error also appears in the 2002 Illinois Agricultural Pest Management Handbook. Lorsban 15G is not a restricted use insecticide; misplaced asterisks (*) in both tables are inaccurate.

Moth Captures in Southern Illinois
Several adult black cutworms have been captured in traps in Massac and Pulaski counties since the traps were established in mid-March. Obviously the current cool temperatures will not allow for rapid accumulation of heat units, so insect development will be slow. Nevertheless, these early intense captures should be marked as an early warning.

Concern About White Grubs Carries into 2002
During the past few years, white grubs have vied with wireworms for the top spot among secondary insect pests of corn. And as the 2002 season begins, concern about white grub problems continues. Topics discussed in the article include the following:

Life cycles and injury
Anticipating white grub problems
Insecticides for control of white grubs

Slugs, Anyone?
In a long-term no-till field in Sangamon County, lots of slugs have been discovered. We usually don't get overly concerned about slugs in Illinois, but the mild winter and recent wet weather may have set us up for some early-season problems. At least it's worth some attention.

The Alfalfa Weevil Report
A few weeks ago during the latter part of our mild winter, most of us would have guessed that alfalfa weevils would have been active by now. However, the recent cold temperatures obviously have slowed down the onset of alfalfa weevil activity.

This article provides information about scouting alfalfa fields for alfalfa weevils.

Insecticides for Alfalfa and Grass: EPA's Interpretation
The United States Environmental Protection Agency recently released an interpretation about the use of insecticides on mixed stands of alfalfa and grasses. Their interest in this issue pertains to some of the illegal applications of some insecticides in 2001 during the armyworm outbreak. Related to this issue, EPA also has questioned some published Extension recommendations in some states.

This article includes the verbatim text received (March 28, 2002) by the American Association of Pesticide Safety Educators from Jack Neylan, chief of the agriculture branch at EPA's Office of Enforcement and Compliance Assistance.

FIFRA Section 2(ee) Recommendations for Insecticides
Section 2(ee) of the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) allows for uses of a pesticide that are not inconsistent with its labeling. Consequently, some companies issue Section 2(ee) recommendations for products to control pests in crops for which the products are already registered. These recommendations allow companies to offer quick "updates" before the federal label is amended.

Products mentioned include DuPont's Asana XL and Syngenta's Warrior.

Soybean Seed Treatments and Control of Seed and Seedling Diseases
Numerous questions come in each year from Illinois growers concerning soybean seed treatments. Common questions often relate to which diseases and pathogens are controlled by seed treatments, which conditions favor these diseases and suggest that seed treatments would be beneficial, and which seed treatments are available and effective. This article will provide information on seed treatments and address these questions.

Burndown Considerations for 2002
The decreased use of soil residual herbicides in soybean, coupled with several recent "mild" winters, has caused some changes in the weed spectrum across much of Illinois. One change that is very noticeable at this time of year is the amount of weed vegetation present in no-till fields. Compared with 10 years ago, the amount of existing vegetation to be dealt with prior to planting is often more dense and comprised of species not familiar to everyone. When air and soil temperatures begin to increase, expect these weeds to grow rapidly.

Corn and Soybean Herbicide Premixes
Herbicide premixes frequently offer several advantages to the producer; however, keeping track of premix components and their ratios can sometimes be difficult. The tables included with this article list most of the commercially available corn and soybean herbicide premixes.

But what if you are interested in an application rate different from that listed for a particular herbicide? With the information presented in these tables, it's relatively simple to do the calculations for your rate of choice. The article provides an example calculation to make it easier to understand.

A Correction from Issue 1 of the Pest Management and Crop Development Bulletin
In last week's Bulletin article "New Herbicides and Label Changes for 2002," there was an error in the rate ratio for the components of the new formulation of Backdraft SL. Backdraft SL 1.35L (imazaquin + glyphosate) at the 2.5 quart per acre application rate delivers 2.14 ounces of Scepter 70DG and 1.47 pints per acre of Roundup Original. This correction also needs to be made in the 2002 Illinois Agricultural Pest Management Handbook.

Regional Reports
Extension Center educators, Unit educators, and Unit assistants in northern, west-central, east-central, and southern Illinois prepare regional reports to provide more localized insight into pest situations and crop conditions in Illinois. The reports will keep you up to date on situations in field and forage crops as they develop throughout the season.

This week's issue includes a report from northern Illinois.

The Pest Management and Crop Development Bulletin
Executive Editor: Kevin Steffey, Extension Entomologist

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