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Forages & Grains
Volume 57 Number 17 Date 08/09/2012 POTATO LEAFHOPPER - Alfalfa surveyed in Dane, Dodge and Columbia counties contained variable counts of 0.1-1.9 per sweep. The average was 0.7 per sweep, based on surveys in a limited number of fields. Economic counts of 2.0 or more per sweep were found at about 22% of sites. PEA APHID - A minor decrease in numbers has been noted since late July. The highest counts were observed in Columbia County, where surveys found only 2-3 per sweep. ALFALFA CATERPILLAR - The adult stage of this insect is fairly abundant in alfalfa in the southern two-thirds of the state, and an increase in larval numbers is anticipated later this month. Damage is most severe when oviposition occurs in recently cut fields and the resulting larvae defoliate the regrowth. --Krista Hamilton, DATCP Entomologist 
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