by Rich Pope, Corn and Soybean Initiative
The 2009 growing season finished off May a bit cool, with degree day accumulations for only one of the nine crop reporting districts, west central, besting its long-term average. May was marginally cooler in the east, although that is not a problem, and crops are off to a great start statewide.
As we projected, black cutworm larvae were large enough to damage corn in southern Iowa by May 25 - with light black cutworm feeding on corn noted last week in southeast and south central Iowa. These infestations have been light and sporadic, but they warrant monitoring.
Weedy fields are a concern statewide. Timely and appropriate weed management, especially in no-till fields, can be economically significant.
Rich Pope is a program specialist with responsibilities with Integrated Pest Management. Pope can be contacted by email at firstname.lastname@example.org or by calling (515)294-5899.