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Forages & Grains
Volume 57 Number 15 Date 07/26/2012 POTATO LEAFHOPPER - Counts remain much the same as previously reported. Surveyed fields in Adams, Juneau, Monroe, Richland and Sauk counties contained 0.4-4.5 per sweep, with an average of 2.2 per sweep. Economic populations were noted at about 30% of sites checked. Nymphs are still common in most fields. PEA APHID - Sweep net counts in the central and southwest counties ranged from 1.5-6.2 per sweep and averaged about 3.1 per sweep during the period of July 19-25. The higher populations were found in Adams and Juneau counties. Aphid densities in alfalfa are relatively low at this time. BLACK BLISTER BEETLE - A few alfalfa fields surveyed in Adams and Juneau counties had low counts of 1-3 beetles per 20 sweeps. Blister beetles can be an indicator of potentially high grasshopper populations since the immature stages are predaceous upon grasshopper eggs. --Krista Hamilton, DATCP Entomologist 
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