Forages & Grains
Volume 63 Number 17 Date 08/30/2018
POTATO LEAFHOPPER - Surveys during the last week of August found very little change in leafhopper populations. Counts were below 0.9 per sweep in all fields sampled. Levels of this insect have been below threshold since peaking in July. Significant population increases are unlikely to occur during the remainder of the growing season.
PEA APHID - Counts ranged from 0.1-3.5 per sweep and averaged less than one per sweep. Pea aphid numbers have been comparatively low this month.
PLANT BUG - Mixed populations of the tarnished and alfalfa plant bugs are still common in alfalfa. Counts this week varied from 0.1-2.0 per sweep, with an average of 0.6 per sweep. Nymphs continue to appear in sweep net collections, suggesting that reproduction is likely to continue into September.
-- Krista Hamilton, DATCP Entomologist