香樟红蜘蛛的发生规律及防治对策探讨

香樟红蜘蛛为刺吸性害虫,主要以群居刺吸树叶汁液而对香樟造成危害。近几年,江南部分城市经常出现红蜘蛛大发生现象,其主要原因除红蜘蛛生命力顽强,繁殖速度快、周期短,传播途径广、个体较小、肉眼不易发现及易产生抗药性等个体原因外,还与树种单一、树冠密度大、通风透光差及防治措施不当等有密切关系。因此,香樟红蜘蛛防治,应坚持预防为主、综合防治的原则。从试验结果看,综合采用生物调节、物理防治,充分利用天敌资源及生物农药防治等多种措施效果非常明显,基本上能控制红蜘蛛对香樟的危害,不再出现红蜘蛛大发生的现象。

Discussion on occurrence regularity and countermeasures of red mite on Cinnamomum camphora (L.) Presl.

Red mite on Cinnamomum camphora (L.) Presl. were sucking pests,mainly in social sucking sap and leaves of Cinnamomum camphora. In recent years,cities in the southern part were often occurred large range of red mite phenomenon,the main reasons were the great vitality,reproduction speed,short cycle,spread widely,individual small,difficult to find the naked eye and easy to produce drug-resistant individual reasons,in addition to single tree species,canopy density,ventilation and light transmission and improper...