摘要
本文首次报道梨圆蚧Ｑｕａｄｒａｓｐｉｄｉｏｔｕｓｐｅｒｎｉｃｉｏｓｕｓ（Ｃｏｍｓｔｏｃｋ）在福建省的发生危害．福建名果黄花梨主产区建宁县此虫发生相当严重，１ａ４－５代，世代重叠．以２龄若虫和少数雌成虫在梨树枝干上越冬，越冬的２龄若虫于３月间开始活动，越冬雌成虫４月上、中旬开始产子．５月中、下旬为第１代１龄若虫发生高峰期，是梨圆蚧药剂防治的关键时期．寄生性天敌已知有１３种，以梨圆蚧恩蚜小蜂Ｅｎｃａｒｓｉａｐｅｒｎｉｃｉｏｓｉ（Ｔｏｗｅｒ）和长缨恩蚜小蜂Ｅ．ｃｉｔｒｉｎａ（Ｃｒａｗ）为优势种群，分别占寄生峰群体的４７．５％和３２．３％．寄生蜂对梨圆蚧的２龄若虫有寄生嗜好，其寄生率占各虫态被寄生总体的６０．９％，一年中９月份寄生率最高，可达２０％。
The San Jose scale Quadraspidiotus perniciosus (Comstock) was first noted as a major pest causing severe damage on pear trees in Jianning County of Fujian Province. The scale developed 4-5 generations per year and overwintered on pear branch with 2nd instar larvae and a few female adults. The mid and late of May was the peak period of 1st instar larvae of the first generation, which is the key time for chemical control to the scale. The 13 parasitoids of the San Jose scale had been found in Fujian Province with the two dominant parasitoids, Encarsia perniciosi (Tower) and E. citrina (Craw). The proposals for managing the San Jose scale were also dealt with in this paper.
出处
《福建农业大学学报》
CSCD
1996年第3期334-338,共5页
Journal of Fujian Agricultural University
基金
国家自然科学基金
福建省自然科学基金资助课题
关键词
梨圆蚧
种群消长
寄生性天敌
果树
害虫
Quadraspidiotus perniciosus (Comstock)
population dynamics
parasitoid
