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Forages & Grains
Volume 59 Number 3 Date 05/15/2014 ALFALFA WEEVIL - Surveys this week found adults at the very low rate of 1-3 per 100 sweeps. Egg deposition is under way across southern Wisconsin, and the first weevil larvae should appear in sweep net collections next week. PEA APHID - Nymphs were collected from 36 of the 45 (80%) alfalfa fields sampled in the last reporting period. The high count of 35 aphids per 100 sweeps was found east of Mazomanie in Dane County. TARNISHED PLANT BUG - Alfalfa surveyed in the south-central and west-central areas contained low counts of 1-12 per 100 sweeps. The average was five per 100 sweeps, an increase from two per sweep in the previous week. Plant bug populations rarely attain economic levels in alfalfa in spring, but their relative abundance can be an indicator of potential problems for apples, strawberries and other fruits and vegetables. -- Krista Hamilton, DATCP Entomologist 
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