Susceptibility of immature stages of the obliquebanded leafroller, Choristoneura rosaceana (Lepidoptera: Tortricidae) to fenoxycarb

M. T. AliNiazee, M. Arshad


In laboratory bioassays, eggs, larvae and pupae of the obliquebanded leafroller, Choristoneura rosaceana (Harris), were susceptible to the juvenile hormone analog, fenoxycarb. All eggs treated with 100 ppm failed to hatch; a dose dependent response was noticed at lower concentration (LC50= 1.59 ppm, LC95=29.88 ppm). High larval and pupal mortality occurred when fully-grown larvae were exposed to fenoxycarb (LC50=2.33 ppm, LC95=32.67 ppm). Freshly formed pupae were slightly less susceptible (LC50=30.50, LC95=93.00) than eggs or larvae. Abnormal development (both in times required for growth and adult formation) was noted in all treatments.

Key words: Choristoneura rosaceana; obliquebanded leafroller; Tortricidae; insect growth regulator; fenoxycarb

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