Forages & Grains
Volume 62 Number 18 Date 08/31/2017
POTATO LEAFHOPPER - Surveys during the last week of August found very little change in leafhopper populations. Counts were below 0.7 per sweep in all fields sampled. Levels of this insect have been relatively low since peaking around mid-July. Significant population increases are unlikely to occur during the remainder of the growing season.
PEA APHID - Late-season counts range widely from 0.5-12 per sweep and average four per sweep. One alfalfa field surveyed in Vernon County contained 19 per sweep, the highest population documented since early June.
PLANT BUG - Mixed populations of the tarnished and alfalfa plant bug remain common in alfalfa. Counts vary from 0.1-1.5 per sweep, with an average of 0.5 per sweep. Plant bug nymphs are still appearing in sweep net collections, suggesting that reproduction is likely to continue well into September.
-- Krista Hamilton, DATCP Entomologist