Issue No. 16/July 10, 2009
Japanese Beetle Reports Common Throughout Illinois
Great increases in Japanese beetle captures in Illinois are being reported. Considerations are discussed regarding rescue treatments in corn and soybeans.
Soybean Aphids Found in Illinois--Infestations Off to a Slow Start This Season
Though soybean aphids are relatively few and far between to date in Illinois, it's not too early to begin scouting for them and their natural enemies in soybean fields.
Western Corn Rootworm Emergence Has Begun
In scouting for western corn rootworm, look for signs of excessive root injury and evaluate the level of control afforded by your transgenic corn or soil insecticide.
Considerations for Applying Foliar Fungicides to Corn
The use of foliar fungicides in corn has been found to be profitable only when diseases are present at a high enough level to cause economic yield losses.
Much of the Illinois corn crop will reach silking in the next two weeks; a good start to plentiful July rainfall raises hopes for recovery from the season's early conditions.
Reports are provided this issue for northern, southern, and west-central Illinois.