Effect of temperature and relative humidity on eclosion of overwintering adults of Cnidocampa flavescens
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Key Words：temperature, relative humidity, Cnidocampa flavescens, overwintering adults, eclosion
Abstract：The effect of temperature and relative humidity on eclosion of overwintering adults of Cnidocampa flavescens (Walker) was studied. The results showed that the optimal temperature for eclosion ranged from 20℃ to 30℃, with the eclosion rate from 8250% to 8725%, and the eclosion rate decreased significantly on 15℃ and 35℃. Higher relative humidity was favorable for eclosion. The eclosion rates in 80% and 90% RH were 81.00% and 84.00%, respectively, which were higher than those in 70% RH below. The eclosion period was different at different temperature. The eclosion peaks at 15, 20, 25, 30 and 35℃were 5th, 4th, 2nd, 2nd, and 3rd week, respectively. The linear and logistic regression methods were used for analyzing the relationship of the eclosion period and temperature. The estimated end of eclosion at 25℃ was earliest (3rd June)with linear regression method.