|
|
|
Forages & Grains
Volume 58 Number 17 Date 08/29/2013 POTATO LEAFHOPPER - Surveys conducted in Buffalo, Juneau, La Crosse, Monroe and Trempealeau counties during the last week of August found non-economic populations. Counts were below 1.9 per sweep in all fields sampled and the average was 0.6 per sweep. Nymphs are appearing less frequently in sweep net collections and significant population increases are unlikely to occur during the remainder of the growing season. PEA APHID - Densities have escalated in individual fields. One alfalfa field surveyed in Buffalo County and two in Monroe County contained 9-19 per sweep, the highest populations documented in several weeks. Other sites had fewer than four per sweep. Pea aphids have been of minor importance this year. GRASSHOPPER - This pest remains abundant in the grassy areas adjacent to alfalfa, but minimal feeding injury is evident beyond the field margins. Alfalfa fields with counts in excess of 2-3 per sweep are not unusual in the west-central area of the state. -- Krista Hamilton, DATCP Entomologist 
|
|