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Northern Illinois Agriculture

University of Illinois Extension
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Hit and miss

Posted by Russel Higgins -

Rainfall is being fickle in 2012, some farmers and fields have been more fortunate than others as we finish the month of June. An impressive storm front came over the NIARC Friday morning but the resulting rainfall, while welcome, was less than hoped for. Retired University of Illinois Extension Crops Educator Dale Baird reported .8 inches of rain near Franklin Grove but high winds overnight have also flattened or caused leaning in a narrow swath of corn fields in his general area.

2012 is turning into an unusual year for insects. If you have been in your fields in the past month you probably noticed Whitefly populations on the underside of the soybean leafs. Dr. Mike Gray reported on this topic in this week's Bulletin.

http://bulletin.ipm.illinois.edu/article.php?id=1672

Earlier in the week my co-worker Mike Roegge shared that populations tentatively identified as Redheaded flea beetles were being found in pollinating corn and clipping silks at levels that justified insecticide applications in Hancock County. Locally I have noticed impressive numbers of Green June Beetles (Cotinus nitida). These large insects may appear menacing and are occasional pests as grubs but as adults they are attracted to decaying or ripe fruit and not considered corn or soybean pests.

(Editors note - In the July 6th issue of the Purdue Pest & Crop Newsletter additional information was provided on the Redheaded flea beetle by John Obermeyer.

http://extension.entm.purdue.edu/pestcrop/2012/issue15/index.html#misplaced

In his article he shared that the feeding by these insects are normally superficial and does not warrant an insecticide treatment. Take home message, if you find large numbers and consider spraying, make sure that silk clipping is actually taking place.)



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