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No. 03/April 12, 2002

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IN THIS ISSUE:
Choose the Proper Gloves When Handling Pesticides
As every applicator knows, gloves should be worn to protect yourself from contact with pesticides. However, choosing the right glove for the job may be confusing, especially when using a variety of pesticides. This article covers the following topics:

Categories (A-H) on Pesticide Labels and the EPA Glove Chart
USEPA Chemical-Resistance Category Selection
Glove Materials
Glove Use Tips

Learn More About Corn Insects
If you are looking for references that will help you identify, scout for, and manage insect pests of corn, look no further than Corn Insect Pests: A Diagnostic Guide and the Entomological Society of America's Handbook of Corn Insects. If you regularly need information about corn insect biology and management, both of these publications would be excellent additions to your bookshelf.

More Intense Captures of Black Cutworm Moths Have Occurred
Continued wet weather in most areas of Illinois will increase concern about black cutworms. The vegetation growing in fields, especially the winter annual weeds, are attractive egg-laying sites for incoming black cutworm females. Consequently, the potential for black cutworm problems increases when planting is delayed.

This article includes a description of the insect, its life cycle, injury symptoms, and suggestions for management.

Survival of Overwintering Borers
Although mild winter weather is beneficial for the survival of some insects, winter weather by itself has little effect on some insects. We really won't know the full potential of the European corn borer or the southwestern corn borer until after corn has been planted (planting time also will affect the survival of these species) and moths begin to fly.

Growers Should Remember to Plant Non-Bt Corn Refuges If They Plant Bt Corn
It is critical that corn growers "follow the rules" this year and in the future so that we can reap the benefits of Bt corn, and other transgenic crop technology, for pest management programs for years to come. So, for the benefit of everyone in agriculture, we urge growers to comply with the recommendations listed in this article.

Update for Slug Control
The slug-control product of choice is Deadline MPs, not Deadline Bullets, as I reported last week. Apparently the pieces in the Bullets formulation are too big and not enough of them get distributed at the application rate of 10 pounds per acre.

Alfalfa Weevils Are Active in Southern Illinois
Several people from southern Illinois reported alfalfa weevil activity during the past week. For the most part, the larvae being found are quite small, and the injury is limited to pinholes in the terminal leaves. However, in some fields in which environmental conditions have accelerated weevil development, the larvae have reached the third instar and the damage is quite noticeable. So the time to scout for alfalfa weevils is now.

An Important Note
The article titled "Insecticides for Alfalfa and Grass: EPA's Interpretation" in last week's Bulletin was extracted verbatim from EPA's Office of Enforcement and Compliance Assistance. Please note that Penncap-M (active ingredient is methyl parathion) no longer is registered for use on alfalfa.

Supplemental Label for Capture 2EC
FMC Corporation has issued a supplemental label for use of Capture 2EC in Illinois (south of U.S. Route 136), Indiana (south of U.S. Route 36), Kentucky, Missouri, and Ohio.

Obviously this supplemental label is intended as an option for growers who do not have granular or liquid insecticide applicators mounted on their planters. This application method has not been thoroughly evaluated by university entomologists in the Midwest, so we can't offer any readily available efficacy data.

Winter Wheat Disease Portrait
Disease reports are at a minimum on the wheat crop this season. The time is right, however, to scout for virus diseases, paying special attention to those fields that seem a bit off color. With the recent rains, this should also be a good week to look for the presence of fungal diseases in the lower canopy as well.

This article discusses barley yellow dwarf virus and soilborne wheat mosaic virus.

Sclerotinia Crown and Stem Rot of Alfalfa
Of the many diseases that damage alfalfa in Illinois, sclerotinia crown and stem rot can be one of the most devastating. Some years it can be severe, resulting in thinning or destruction of stands and reduced yields, and other years it is uncommon. The disease may also be overlooked because it often occurs sporadically and may kill small patches of plants. Last year (2001) the disease was uncommon in Illinois, and we received only a few reports of it causing damage. Watch for the disease in April and into mid-May.

Changes in Giant Ragweed Emergence
Over the last couple of years, giant ragweed has grown in prominence to become one of the top five troublesome weeds that corn and soybean producers face. The species has not always been a problem for corn and soybean producers in Illinois. In fact, in the 1960s and 1970s, most giant ragweed plants were found along drainage ditches and roadsides and in the occasional field along a floodplain.

So, what has caused this weed to be one of the major challenges that Illinois growers face today? This article examines possible answers to that question.

Option and Yukon Receive State Registration
In issue no. 1 we mentioned two new herbicides that were pending registration. In the last week, both of these herbicides, Option and Yukon, have received state registration.

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 reports from east-central, northern, southern, and west-central Illinois.



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

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