Effect of Gradient Temperature on Experimented Population of Crisicoccus pini

The influence of gradient temperature on survival and oviposition of the over-wintering female adults of Crisicoccus pini, egg incubation and worm development was studied and some conclusions were drawn as follows:The survival rate of the female adults dropped as the temperature rose within a certain temperature range, and the female adults could not survive for a long period under 29~35℃.Oviposition by female adults that were treated by high temperature dropped dramatically, indicating the high temperature inhibited oviposition of the adults.The optimal temperature range for adult development was between 19℃ to 24℃.The suitable temperature scale for egg incubation and worm development was between 21℃ and 26℃, it was showed that egg incubation and worm development sped up when the temperature was higher than this scale and the egg incubation and worm development slowed down while the temperature was lower than this scale.