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Forages & Grains
Volume 58 Number 13 Date 08/01/2013 POTATO LEAFHOPPER - This primary alfalfa pest generally has been less of a problem than anticipated in the second and third crops. Surveys this week found counts of less than two per sweep, with a range of 0.1-1.9 per sweep. Continued sampling throughout August is recommended since counts are just below the two per sweep threshold (for 12-inch or taller alfalfa) in some fields. PLANT BUG - Representative counts range from 0.1-2.3 per sweep. The average is low at 0.9 per sweep. Nymphs of various maturities are common but not abundant in most alfalfa plantings. Plant bug populations have been comparatively low all season long, according to our surveys. PEA APHID - Populations are somewhat higher than last week at 1-7 per sweep, with a few individual fields showing high counts of 10-26 per sweep. The abnormally cool, dry weather of late July has been favorable for proliferation of these aphids. -- Krista Hamilton, DATCP Entomologist 
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