Impact of sub-lethal residues of azinphos-methyl on the pheromone-communication systems of insecticide-susceptible and insecticide-resistant obliquebanded leafrollers Choristoneura rosaceana (Lepidoptera: Tortricidae)

• Published in: Pest management science 2004-07, Vol.60 (7), p.660-668
• Main Authors: Trimble, R.M, El-Sayed, A.M, Pree, D.J
• Format: Article
• Language: English
• Subjects: Animals; apples; azinphos-methyl; Azinphosmethyl - metabolism; Azinphosmethyl - toxicity; Behavior, Animal - drug effects; Behavior, Animal - physiology; Biological and medical sciences; biosynthesis; Choristoneura rosaceana; Control; Female; Fundamental and applied biological sciences. Psychology; insect communication; insect control; insect pests; insecticide residues; insecticide resistance; Insecticide Resistance - drug effects; Male; Malus domestica; Moths - drug effects; orchards; Pesticide Residues - metabolism; pheromone communication system; pheromones; Pheromones - biosynthesis; Phytopathology. Animal pests. Plant and forest protection; Protozoa. Invertebrates; Sex Attractants - physiology; strain differences; sub-lethal residues of azinphos-methyl; Tortricidae
• ISSN: 1526-498X; 1526-4998
• DOI: 10.1002/ps.841

The effects of sub-lethal residues of azinphos-methyl on pheromone production, calling, female attractiveness and the ability of males to locate sources of natural and synthetic pheromone were compared in azinphos-methyl-susceptible (susceptible) and azinphos-methyl-resistant (resistant) obliquebanded leafrollers, Choristoneura rosaceana (Harris). The amount of pheromone in susceptible females was reduced by 29-33% after exposure to azinphos-methyl; this treatment did not affect the pheromone content of resistant females. Azinphos-methyl-treated resistant females contained 39-43% less pheromone than azinphos-methyl-treated susceptible females. Resistant females that were not treated with azinphos-methyl contained 35-56% less pheromone than susceptible females that were not treated with insecticide. The incidence of calling was reduced by 67-100% in azinphos-methyl-treated susceptible females; the incidence of calling by resistant females was not affected by exposure to azinphos-methyl. The incidence of calling by azinphos-methyl-treated susceptible females was 58-100% lower than that of azinphos-methyl-treated resistant females. There was no difference in the incidence of calling between susceptible and resistant females that had not been treated with insecticide. In a flight tunnel, treatment with insecticide reduced the attractiveness of susceptible females by 38%; treatment with insecticide did not affect the attractiveness of resistant females. There was no difference in the proportion of males attracted to susceptible and resistant females that had, or had not been treated with insecticide. In an apple orchard, the attractiveness of susceptible and resistant females treated with azinphos-methyl was reduced by 84 and 12%, respectively. The proportion of males attracted to azinphos-methyl-treated susceptible females was 58% lower than the proportion attracted to azinphos-methyl-treated resistant females, whereas, if females were not treated with insecticide, the proportion attracted to resistant females was 57% lower than the proportion attracted to susceptible females. In a flight tunnel, azinphos-methyl did not affect the ability of susceptible or resistant males to locate a source of pheromone gland extract. Likewise, in an apple orchard, the insecticide treatment had no effect on the ability of susceptible or resistant males to locate a source of synthetic pheromone. In a flight tunnel, there was no difference in the proportion of azinphos-methyl-tr