Forages & Grains
Volume 63 Number 15 Date 08/16/2018
POTATO LEAFHOPPER - Alfalfa surveys in western Wisconsin found 0.1-1.5 adults and nymphs per sweep. The average was 0.5 per sweep. Economic counts of two or more leafhoppers per sweep were not observed in the past week.
PEA APHID - Populations of this forage pest are low. Most fields sampled from August 9-16 had fewer than 0.4 per sweep (40 per 100 sweeps).
PLANT BUG - Nymphs continue to be common in sweep net collections, although averages remain well below the five plant bugs-per-sweep threshold. Counts this week varied from 0.4-2.5 per sweep, with an average of 0.9 per sweep. Plant bug numbers in alfalfa have not reached economic levels at any time this season, but populations reportedly have been high in some fruit and vegetable crops.
-- Krista Hamilton, DATCP Entomologist