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Forages & Grains
Volume 60 Number 19 Date 08/27/2015 POTATO LEAFHOPPER - Surveys during the last week of August found low to moderate counts of 0.4-1.5 leafhoppers per sweep, with an average of 0.5 per sweep. Levels of this insect have been non-economic all summer long, despite a timely spring arrival and favorable temperatures. Significant population increases are unlikely to occur during the remainder of the growing season. PLANT BUG - Nymphs were less abundant in fields sampled this week, indicating population growth has slowed in response to the cooler weather. Counts ranged from 0.1-1.9 per sweep and averaged 0.7 per sweep. The tarnished plant bug remains the most common of the plant bug species found in alfalfa. PEA APHID - In contrast to other alfalfa pests, populations of this insect have increased slightly under the cool and mostly dry weather pattern of late August. The average count from August 20-26 was approximately four per sweep, although densities varied from 1-9 per sweep. The higher counts were found in west-central Wisconsin. -- Krista Hamilton, DATCP Entomologist 
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