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Forages & Grains
Volume 58 Number 14 Date 08/08/2013 POTATO LEAFHOPPER - Surveys continue to yield non-economic leafhopper counts of less than two per sweep. Despite the dry weather and brief heat wave last month, populations have remained consistently low since the first migrants arrived in the state in May. Nevertheless, weekly monitoring of the third alfalfa crop throughout August is recommended. PEA APHID - Counts are similar to last week at 1-10 per sweep. Most fields contain fewer than three per sweep. Populations of this forage pest have increased slightly in response to the cooler and mostly dry weather, which favors aphid population growth. PLANT BUGS - Nymphs have become more abundant in alfalfa in the last two weeks and now comprise about 40-50% of sweep net collections. The high count for the week was 5.4 per plant (adults and nymphs) near Tomah in Monroe County, although other surveyed fields had significantly lower averages of 0.4-2.5 per sweep. -- Krista Hamilton, DATCP Entomologist 
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