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Forages & Grains
Volume 58 Number 11 Date 07/18/2013 POTATO LEAFHOPPER - Alfalfa surveyed in Dane, Dodge, Grant, Green, Jefferson, Lafayette, Monroe, Richland and Rock counties contained less than two per sweep. Economic counts still have not been found in any field sampled by DATCP specialists, although nymphs of various maturities are common and reproduction is likely to have intensified with this week's extreme heat. PEA APHID - A marked population increase has occurred in the past week. Several fields surveyed had populations of 5-10 per sweep and individual fields had counts of 25 or more per sweep, including numerous nymphs. The highest populations were found in Monroe and Rock counties. PLANT BUG - Counts of the tarnished and alfalfa plant bugs averaged only 0.6 per sweep from July 11-17, which is well below the economic threshold of five per sweep. Nymphs are relatively common in most fields and comprise about 25% of sweep net collections. -- Krista Hamilton, DATCP Entomologist 
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