论文部分内容阅读
１９９２～１９９５年对祥云新松叶蜂的种群动态进行了研究，结果分析表明，影响种群动态的主导因子是茧期死亡率，茧期死亡主要由天敌引起。由于祥云新松叶蜂幼虫具有驱赶天敌的利己激素，捕食性天敌昆虫对幼虫不能产生明显的控制作用。影响幼虫期死亡率的主要因子是温度。通常死亡率低海拔大于高海拔，同一海拔阴坡大于阳坡。由于祥云新松叶蜂危害云南松老叶，且对天敌抵抗力强，具有持续数年危害的特点
From 1992 to 1995, the population dynamics of Nelumbo nucifera was studied. The results showed that the dominant factor affecting population dynamics was cocoon mortality, while the cocoon death was mainly caused by natural enemies. Because of the new cloud pine nematodes larvae have the predators to repel enemies of hormones, predators of insects on larvae can not produce significant control. The main factor affecting larval mortality is temperature. Usually, the mortality rate is lower than the altitude and the same altitude is larger than the sunny slope. As the new cloud pine bumblebee Pinus yunnanensis leaves old, and strong resistance to natural enemies, with the characteristics of continuing harm for several years