Effects of Temperature on the Development of Diomea cremata （Lepidoptera, Noctuidae）

Abstract

Effects of temperatures（15, 19, 22, 25, and 28°C）on the development of eggs, larvae, and pupae of Diomea cremata（Butler）, a pest of sawdust-based cultivation of shiitake mushroom, Lentinula edodes, were investigated. Hatchability was higher than 80% at 19, 22, 25, and 28°C, but was 58% at 15°C. Pupation rate was 62% at 25°C and 54% at 22°C, but was lower than 40% at 15, 19, and 28°C. Emergence rate from pupae was higher than 80% at all temperatures examined. Development time from hatching to adult eclosion decreased with increasing temperature from 15°C to 25°C, but not from 25°C to 28°C. Lower thermal threshold and thermal constant from hatching to adult eclosion were calculated as 11.2°C and 429.0 degree-days in males, and 11.3°C and 418.6 degree-days in females, respectively. These thermal requirements indicated that D. cremata might complete two or three generations in cultivation facilities.