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I explored the mating behavior, adult longevity, and number of eggs oviposited in Diomea cremata（Butler） （Lepidoptera: Noctuidae）under laboratory conditions. Calling and mating behaviors were observed at 24°C under a 16 : 8-h light : dark regimen. Calling and mating were evident in the scotophase. Calling activities were observed in 59–89% of 0–6-day-old female adults and did not differ by age. The mating duration was 93.6±3.7（mean±SE） min. Most males did not copulate on the day of emergence, but females did. Adult longevity and ovipositing were investigated at 24°C under a 16 : 8-h light : dark regimen. The adult longevity（mean±SE）was 8.8±0.7 days for males and 11.5±1.3 days for females. The proportion of ovipositing females increased at 3 days after adult emergence. On average, 160.2±29.7 eggs were oviposited; this number was significantly correlated with adult survival. These results suggest that D. cremata has a reproductive strategy to exploit fruiting bodies whose numbers were unpredictable over time and space, i.e. female adults copulate soon after emergence, after that they search for fruiting bodies which are adequate to their larval food and lay eggs throughout their lifetime. [ABSTRACT FROM AUTHOR]

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. [ABSTRACT FROM AUTHOR]