|
Forages & Grains
Volume 60 Number 15 Date 07/30/2015 POTATO LEAFHOPPER - Surveys continue to yield non-economic counts of less than two leafhoppers per sweep, despite the drier weather and favorably warm temperatures of late July. Nevertheless, weekly monitoring of third- and fourth-crop alfalfa throughout August is recommended. PLANT BUG - Counts are similar to last week at 0.3-2.4 per sweep. Most fields contain an average of one plant bug per sweep, a fraction of the economic threshold of five per sweep. Nymphs have become more abundant in alfalfa in the last two weeks and now comprise about 50-75% of the plant bugs in sweep net collections. PEA APHID - Levels are still extremely low at less than one aphid per sweep in all alfalfa fields sampled in southern and western Wisconsin. -- Krista Hamilton, DATCP Entomologist |