Thrips populations on onions were reduced and yields were significantly better in plots trea. Propargite and bifenthrin caused adjusted decreases in mite populations of 55 and 61 percent after 30 days in 1994 and 86 and 85 percent after 20 days in 1995. The 1995 date of planting test had low mite populations, no damage and no yield effect. Aphids, at the end of the season were ca. There are several varieties that exhibit substantial tolerance to the greenbug biotypes compared to a non- resistant hybrid.
Evidence shows increased insecticide resistance.
Alfalfa weevil populations developed somewhat earlier than usual in April due to the warm dry winter. Banks grass mites on corn did not develop due to unseasonably wet weather. Greenbugs on sorghum were decimated by an unidentified disease during the wet, humid weather. Thrips introduced with transplants from southern areas are showing signs of insecticide resistance. Applications of carbaryl and esfenvalerate to adult beetles 30 days prior to larval damage reduced damage ca.