榴绒粉蚧发生规律及其综合防治研究

OCCURRENCE PATTERN OF ERIOCOCCUS LAGEROSTROEMIAE KUWANA AND ITS INTEGRATED CONTROL

榴绒粉蚧是云南蒙自石榴的主要害虫之一 ,1年发生 4代 ,世代重叠。以成虫、若虫越冬。主要危害代第 1 ,2代成虫 ,若虫入果实萼筒中或果与果、果与叶片相接处取食危害 ,致果皮伤口并将干腐病菌传入伤口处 ,果皮伤口经首次连续降雨雨水浸泡溢出的汁液为干腐病菌提供了生长繁殖条件 ,该虫是干腐病的媒介者。一般年份果园有虫株、果率达 85 %～ 95 % ,75 %～ 90 %。采取综合防治后 ,有虫株、果率降为 2 0 %～ 2 5 % ,1 0 %～ 1 5 %

Eriococcus lagerostroemiae Kuwana is one of the main pests attacking Punica granatum in Mengzi county, Yunnan province. In a study reported in this paper, the pest was found to have 4 overlappling generations in a year and overwinter as adults and nymphs. The adults or nymphs, mainly in the first and second generations, entered the calyx tube of the fruit or the caps between fruits or between the fruit and the leaf and caused damage, resulting in infection of the fruit by Zythai versoniana Sacc through the wound. So E. lagerostroemiae is the vector of Z.versoniana. Measures of integrated control reduced the infection percentage per tree and per fruit from 85%～95% and 75%～90% to 20%～25% and 10%～15%, respectively.