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Issue No. 7/May 7, 2004

Time for Alfalfa Watch
PEAQ (Predictive Equations for Alfalfa Quality) helps producers monitor alfalfa quality and plant growth and decide the date of first cutting.

Update of Moth Captures
Moths of black cutworm, armyworm, corn earworm, and European corn borer have all been caught in southern Illinois traps, with intense captures reported for black cutworm in several locations.

Southern Corn Leaf Beetle
Several reports of potential injury by the southern corn leaf beetle have come from western and west-central Illinois. Life cycle, identification, injury symptoms, and control options are outlined.

Windy Planting Conditions and Application of Granular Soil Insecticides: Is Placement Significantly Affected?
How might wind affect effectiveness of granular soil insecticides? Results of a relevant study are presented.

Stripe Rust of Wheat Reported in Illinois
The foliar fungal disease stripe rust is appearing in Illinois wheat fields. Identification, disease development, and control options are discussed.

Time to Look for Corn Nematode Injury
Needle nematodes can seriously reduce corn stands in soils containing 80% sand. Symptoms, diagnosis, and management are detailed.

A Plethora of Corn Postemergence Concerns
It's time to considering applying postemergence corn herbicides in many Illinois areas. Be sure to follow guidelines for maximum corn size at which an herbicide can be applied. Advice is also provided on application in a liquid nitrogen solution carrier, tank-mixing corn herbicides and insecticides, and potential herbicide injury to crops under stress.

Waiting for Warmth
Despite much early planting, growing degree-days are not accumulating as fast as desirable. Effects of frost on emerged corn and soybean plants are discussed, as are causes for nonuniform corn stands. Wheat is benefiting from cool weather, though "tied-in" heads are appearing in some fields.

Regional Reports
Reports are provided this issue for northern, southern, and west-central Illinois.