CONTROL OF THE BANKS GRASS MITE (ACARI, TETRANYCHIDAE) WITH BIFENTHRIN AND PROPARGITE APPLIED AT DIFFERENT GROWTH-STAGES OF CORN
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Determined the effect of Zea mays growth stage on susceptibility of Oligonychus pratensis to the acaricides bifenthrin and propargite. Control of Banks grass mite by bifenthrin applied at 0.07kg (AI)/ha was best at growth at stage 3. Control of Banks grass mite did not differ among the growth stage treatments when bifenthrin was applied at 0.09kg (AI)/ha. Differential susceptibility of Banks grass mite to bifenthrin applied at 0.07kg (AI)/ha may be the result of a physiological interaction between plant biochemistry and mite susceptibility to acaricides at certain growth stages or low mite densities at application. -from Authors
