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Forages & Grains
Volume 59 Number 15 Date 08/14/2014 POTATO LEAFHOPPER - Counts remain below-threshold in all surveyed areas, rarely exceeding 1.5 adults and nymphs per sweep. Levels of this insect have been low to moderate all season long. Routine monitoring should continue through early September. PLANT BUG - Nymphs were less abundant in fields sampled this week, indicating reproduction has slowed. Populations ranged from 0.1-3.5 per sweep and averaged 1.5 per sweep, compared to an average of 2.1 per sweep last week. The tarnished plant bug is still the most common of the plant bug species found in alfalfa. PEA APHID - Levels of this insect have not increased in response to this month's cool and mostly dry weather, which ordinarily favors aphid population growth. The average count from August 7-13 was less than one per sweep. Pea aphid levels have been consistently low since the last week of June when counts peaked at approximately 20 aphids per sweep. -- Krista Hamilton, DATCP Entomologist 
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