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Issue No. 15, Article 5/July 7, 2006

Regional Reports

Northern Illinois

Moderate temperatures have returned to the region, which will be beneficial as some of the earliest-planted corn will begin to tassel by the end of the week. Most of the region received precipitation on July 3, ranging from 0.3 inch or less in the northwest and 0.5 to 1 inch in the northeast.

Soybean aphids are present in the region, but there have been no reports of populations reaching economic thresholds. We continue to receive numerous reports of cupped soybean leaves.

Extension educators began monitoring for western bean cutworm moths on July 1 as part of a multistate effort. Trapping will continue for about six weeks.

West-Central Illinois

Rain continues to be exceptionally spotty in the west-central region of the state. One field receives somewhat adequate rainfall, while several nearby fields receive little precipitation of consequence. Most producers now feel that the "drought is over" declarations made a few to several weeks ago were premature.

Wheat harvest is wrapping up in the region. While yield estimates may not have been record breakers, they did appear more than acceptable. Many commented on the exceptional appearance of that crop at harvest.

Potato leafhopper continues to be the major story in alfalfa and appears to have surprised a number of individuals. More than a few yellow, hopper-burned field edges testify to that fact.

Soybean fields continue to display impressive infestations of Rhizoctonia root rot and now display some exceptional leaf injury from foliage-feeding pests, including the Japanese beetle.

The Japanese beetle and the adult western corn rootworm beetle are now topics of conversation regarding corn. Silk clipping already appears fairly impressive in many areas throughout the region. Varied silk emergence, intense beetle pressure, and tight margins again raise the question "to spray or not to spray." Diseasewise, the corn crop as of this moment still appears exceptionally healthy, with few fields displaying intense lesion development above the ear leaf and many fields displaying little to no lesion development at all.

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