【摘要】 <正> 竹巢粉蚧(Nesticoccus sinensis Tang)又名灰球粉蚧,为我国近年发现的一个新种,隶属于粉蚧科Pseudococcidae、巢粉蚧属Nesticoccus。该虫广泛分布于苏、浙、皖、鲁等省竹区,为新辟竹区重要害虫。作者于1978至1981年对竹巢粉蚧的发生、为害和防治等进行了观察和研究,所得结果报道如下。更多还原

【Abstract】 The bamboo scale Nesticoccus sinensis Tang is one of the important bamboo pests. Its endemic region covers over Jiangsu, Zhejiang, -Anhui and Shandong Provinces and its host plants include Phyllostachys pubescens, Ph. nigra, Ph. viridis f. houze-auana, Ph. spectabilis, Ph. glauca, Ph. propinqua, Ph. iridencens, Ph. vivax and Ph. viridis var. yongii.This scale has one generation per year and passes over summer and winter as gravid female which would give rise to from 38 to 875 offsprings through ovovivi-pary. The nymphs begin to appear from late April to early May and end in middle June, with population peak in middle May. The male nymph used to pupate in late May and 15 days after pupation the adult would emerge. Adult female would appear in early June, with the peak of emergence in mid-June. The sex ratio is nearly 1:1 and the nymphal stage, male and female life spans are 80, 1-4, and 300 days respectively.Our study shows that this scale can be controlled during the peak of hatching by spraying twice with 25% Imidan or 80% :DDVP emulsion diluted with 800 to 1000 times of water, the second spray should be: done 10 days later, or by injecting each bamboo at the base with 3ml. of 40%. Omethoate or 40% Acephate emulsion. The mortality rate of the scale would reach more than 95%.更多还原