Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Effects of temperature on eggs, fecundity, and adult longevity of Hylobius transversovittatus Goeze (Coleoptera: Curculionidae), a biological control agent of purple loosestrife.

Abstract

Egg hatch, egg production and adult longevity of Hylobius transversovittatus were studied at LD 16:8 and 10, 15, 20, 25, 27.5, 30, 32.5 and 35°C in the laboratory. The egg development period ranged from 7.8 days at 30°C to 35.8 days at 15°C. Egg hatch was 5% at 32.5°C and >62% at 15-30°C. No eggs developed at 10°C. The minimum threshold temperature for development was 9.5°C, with 149.5 day degrees C required to complete developed. Longevity of adult males varied from 307.0 to 1197.6 days at 30 and 15°C, respectively, and that of females from 185 to 1149 days. The preoviposition period ranged from 8.4 days at 25°C to 77.9 days at 12.5°C. The minimum temperature was 12.7°C, with 115.4 day degrees C required to complete the preoviposition period. The mean number of eggs produced ranged from 139.0 at 30°C to 701.3 at 25°C.