摘要
通过对松毛虫越冬地越冬期土壤最低温度、松毛虫上树期气温与同期松毛虫幼虫过冷却点温度值比较分析表明，越冬地最低土壤温度明显高于致死温度的过冷却点值，因而越冬地松毛虫不会因低温而致死；松毛虫上树期的早春降温不是影响幼虫种群变动的主要原因，而过快的温度回升降低了林间空气的相对湿度，使刚恢复活动的幼虫因失水代谢紊乱而丧失生命力。
This paper deals with analysis of the factors that cause
pine caterpillars to die during two different living phrases. Through comparing the soil
temperature during overwintering phase and the air temperature during uptotree phase the
temperature of pine caterpillar 's supercooling point in the same time, the cold temperature was
ruled out of the reasons of the pests' death. During uptotree phase, it was the low moisture
content in the air due to rapid temperature change that caused the pest to die from loss of body
water followed by metabolic disorder.
出处
《辽宁林业科技》
1999年第2期21-23,51,共4页
Liaoning Forestry Science and Technology
关键词
松毛虫
过冷却点
上树期
相对湿度
种群变动
pine caterpillar, supercooling point, relative
moisture content, population change
