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前言矢尖蚧是柑桔上的重要害虫,国内各产区发生比较普遍。近年来局部地区有严重成灾的现象。矢尖蚧在重庆地区一年发生2—3代,5月间是其第一代幼蚧盛发期,为防治的关键时期,而此时恰逢多雨季节,极易错过时机。后期随着虫龄增大,各虫态重叠而降低了防治效果,增多了防治次数。在防治方法上已往多采用化学农药,防治害虫与保护利用天敌之间的矛盾十分突出。为此极待探讨综合的治理措施、寻找准确的化学防治适期、浓度和用药次数,以及对天敌安全对害虫高效的药剂。
Introduction Agkistrodon acutus is an important pest on citrus, which is common in all producing areas in China. In recent years, some areas have been seriously affected by the disaster. Centipede scale occurs in Chongqing area 2-3 generations a year, in May is the first generation of juvenile scabious period, as a critical period of prevention and control, but coincides with the rainy season at this time, easily missed the opportunity. Late with the worm age increases, the overlap of the insect state and reduce the control effect, an increase of the number of prevention and treatment. In the prevention and treatment methods have been to use more chemical pesticides, prevention and control of pests and the contradiction between the use of natural enemies is very prominent. To this end, it is necessary to discuss comprehensive management measures to find out the appropriate chemical control of the appropriate period, the concentration and frequency of medication, as well as the safety of natural enemies of pests efficient agents.