Cold! That is the best way to describe the first three and a half months of 2008. A cool spring has delayed alfalfa weevil hatch this year, however Iowa fields should have accumulated sufficient temperatures for larvae to hatch starting April 23-25 in southern Iowa. Naturally, weevils with hatch at slightly later dates in the central and northern counties of the state.
Iowa State University
Rice, Marlin E. and Pope, Richard O., "Alfalfa Weevil Predictions for 2008" (2008). Integrated Crop Management News. 968.
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