Issue No. 11/June 3, 2005
Training Session to Focus on Midsummer Insect Issues
Topics at a June 27 workshop will include assessing corn rootworm larval injury and efficacy of control products, including transgenic corn; sampling, assessing, and predicting soybean aphid populations; and a monitoring program for western bean cutworm. The fee for the morning workshop is $25.
The Soybean Aphid Season Has Begun
It's time to step up the vigilance for soybean aphids, but don't overreact to early sightings. Directions for an efficient method of "speed scouting" are available online.
Twospotted Spider Mites in Soybeans Add Another Level of Concern
An early sighting means that crop scouts and growers should be looking for signs of twospotted spider mite infestations. Tips on scouting for are given along with injury symptoms and treatment guidelines.
Corn Rootworm Larval Hatch Confirmed
We anticipate over the next week to 10 days hearing many more reports of corn rootworm larvae feeding on tender corn roots. If the dry pattern lingers for the next several weeks, producers should expect marginal performance for soil insecticides.
Fall Armyworm Moths . . . Already?
Two fall armyworm moths have been captured in Jefferson County. Keep an eye on late-planted or replanted cornfields for fall armyworm larvae.
Arrival of Potato Leafhoppers
Potato leafhoppers were found in Illinois alfalfa fields last week. Their physical characteristics and life cycle are outlined along with injury symptoms, scouting guidelines, and control options.
Watch for Soybean Seed and Seedling Diseases
The characteristics of soybean seed and seedling diseases, the conditions that favor them, and approaches to management are detailed.
Dry Weather Concerns with Postemergence Herbicides
If dry soil conditions persist, it may become more difficult to control weeds with postemergence corn and soybean herbicides. The processes of water uptake and water loss are described, and ways to offset the adverse effects of dry weather on the activity of postemergence herbicides are outlined.
Preharvest Herbicides for Wheat
Options are detailed for wheat producers who may be considering applying a preharvest herbicide treatment to control weeds that could make harvesting operations difficult.
Is It Drought Yet?
Is there anything to be done to help crops that are showing drought stress symptoms and growing very slowly? The effects of soil dryness and appropriate responses are described.
Reports are provided this issue for northern and southern Illinois.