Abstract
Bioassays were conducted to examine the residual activity of the insect growth regulator fenoxycarb, at two rates (20 and 40 ppm), against eggs and late instars of the tufted apple bud moth, Platynota idaeusalis (Walker). Both rates of fenoxycarb showed very good larvicidal activity 3-4 wk after application. Fenoxycarb had no effect on P. idaeusalis eggs. Field trials conducted over 2 yr showed that fenoxycarb provided control of P. idaeusalis equivalent to conventional insecticides, but with fewer applications. Fenoxycarb did not affect integrated mite control, but indirect evidence suggested a possible detrimental effect on immatures of Stethorus punctum (LeConte).
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