昆明市考氏白盾蚧的危害特点及发生规律研究

Damage Characteristics and Occurrence Regularity of Pseudaulacaspis cockerelli in Kunming

考氏白盾蚧是危害观赏植物山茶和茶梅的主要害虫之一。于2014年3月至2016年3月调查了云南省昆明市考氏白盾蚧的危害特点及发生规律。结果表明:考氏白盾蚧在昆明市翠湖公园、西南林业大学、金殿公园的山茶和茶梅上均有发生,西南林业大学山茶受害率最高,受害率为100%;金殿公园山茶受害最严重,受害指数为65%;在空间分布上,树冠东面外侧危害最严重,单叶平均虫口密度为9.7头;考氏白盾蚧在昆明市1年发生2代,以受精的雌成虫在介壳下越冬,3月中旬开始产卵,3月下旬至5月上旬、7月下旬至8月中旬分别是第1代和第2代初孵若虫的涌散期。

Pseudaulacaspis cockerelli is one of the main pests which damage Camellia japonica and C. sasanqua. The damage characteristics and occurrence regularity of Pseudaulacaspis cockereUi were investi- gated in Kunming, Yunnan Province during March 2014 to March 2016. The result showed： （1） P. cockerelli took place in 3 districts of Cuihu Park of Kunming City, Southwest Forestry University, Jindian Park of Kunming; The damaging rate of C. japonica was highest in Southwest Forestry University, which accounted for 100% ; Pest indexes was the highest in Jindian Park, accounted for 65% ; For the spatial distribution, the damage of east-outer of trees was most severe, average population density was 9.7 on each leaf. （2） Pseudaulacaspis cockerelli had two generations for one year in Kunming, and gamic female insect overwinter under its testa; The adults began to laid eggs at the middle of March; The first genera- tion nymphs was swarmed from late of March to middle of May and the second generations was swarmed from the late of July to the middle of August.