Influence of Mixtures of Kaolin Particle Film and Synthetic Insecticides on Mortality of Larval Obliquebanded Leafrollers (Lepidoptera: Tortricidae) from Resistant and Susceptible Populations

摘要: Experiments were conducted to determine potential interactions between kaolin particle film and three insecticides on neonate larvae of the obliquebanded leafroller, Choristoneura rosaceana (Harris) (Lepidoptera: Tortricidae). Kaolin did not significantly affect toxicity azinphosmethyl or indoxacarb an insecticide-susceptible population when applied simultaneously with either insecticide in a 7-d leaf disk bioassay. Methoxyfenozide was slightly more toxic same leafroller coapplied kaolin. When these bioassays repeated multiresistant laboratory strain C. rosaceana, mixtures than alone, 3.1- 7.7-fold for azinphosmethyl:kaolin indoxacarb:kaolin, respectively. Mixtures methoxyfenozide differ resistant from alone. alone had no effect mortality over duration Although toxicities are only moderately higher those they may be high enough provide control populations that have become difficult manage due development resistance.