Effect of temperatures on survival and fecundity of Heterolocha jinyinhuaphaga

Key Words： Heterolocha jinyinhuaphaga, temperature, livability, adult longevity, sex ratio, oviposition amount

Abstract：        The effect of temperature on the development, survival, adult longevity and fecundity of Heterolocha jinyinhuaphaga Chu was studied at seven constant temperatures (16, 19, 22, 25, 28, 31, 34℃) in a laboratory. The developmental duration of every larval instar shortened with increasing temperature up to 34℃at which temperature development was prolonged. This indicates a nonlinear relationship between temperature and development. The survival of every larval instar was the highest (>90%) at 25℃ and was obviously less at lower or higher temperatures. The proportion of females to males was higher at low temperatures and decreased with increasing temperature. Adult longevity was inversely correlated with temperature. The oviposition rate per female was the highest at 25℃ (232.34) and significantly less at lower or higher temperatures.