摘要
1 引言 柳牡蛎蚧(Lepidosaphes salicina Bersch)(同翅目:盾蚧科)是一种以为害杨树为主的刺吸式害虫之一,广泛分布于“三北”防护林区,该蚧一年发生一代,以卵越冬。通过刺吸式口器刺入树皮内,吸取树木养分和水分,并使树木表皮栓化。同时,由于枝干被蚧壳所覆盖,对呼吸及光合作用也有影响,特别是幼树被害后。
Mean life tables for two generations of Lepidosaphes salicina Bersch., a main pest of shelter-forests in North China, are compiled by statiscal method. The unhatching rate o| these two generations at egg stage is 66.5 and 36.0％, and their mortality at fixed nymph stage is 28.0 and 32.7％ respectively. The predation rate of 2nd instat nymph by Hemisarcoptes malus, an important natural control agent, is 36. 3 and 41. 6％, and the parasition rate of female adult by Aphytis proclia is 2. 2 and 7.2％ respectively. The population fluctuation trend index(Ⅰ) for these two generations is respectively 1.12 and 1.26.
出处
《应用生态学报》
CAS
CSCD
1993年第4期454-455,共2页
Chinese Journal of Applied Ecology
关键词
柳牡蛎蚧
生命表
盾蚧科
昆虫
Life table, Lepidosaphes salicina, Hemisarcoptes malus, Aphytis proclia.
