甘草胭珠蚧卵有效积温及若虫化学防治研究  

Effective accumulative temperature of Porphyrophora sophorae eggs and chemical control of nymphs

作　　者：陈宏灏[1] 南宁丽[1] 邢敏[1] 张蓉[1] CHEN Honghao;NAN Ningli;XING Min;ZHANG Rong(Institute of Plant Protection,Ningxia Academy of Agricultural Sciences,Yinchuan 750002,Chin)

机构地区：[1]宁夏农林科学院植物保护研究所,银川750002

出　　处：《植物保护》2018年第4期230-232,236,共4页Plant Protection

基　　金：宁夏科技惠民项目(2015);宁夏农林科学院科技先导项目(NKYJ-16-08)

摘　　要：甘草胭珠蚧Porphyrophora sophorae(Arch.)是人工甘草毁灭性害虫。通过有效积温法研究了甘草胭珠蚧卵的发育起点温度和有效积温,并通过室内毒力测定和田间药效试验研究了甘草胭珠蚧若虫的化学防治技术。结果表明,甘草胭珠蚧卵的发育起点温度为(9.27±2.00)℃,有效积温(574.98±21.40)日·度。2%阿维菌素乳油对甘草胭珠蚧若虫的毒性最高,LC50为2.322 1mg/L。卵孵化初期,用5%阿维菌素缓释颗粒剂60kg/hm2撒施,耙地混土并打散若虫聚集再灌溉,对甘草胭珠蚧若虫的防治效果可达到90%以上。研究结果为甘草胭珠蚧防治提供了新方法。Porphyrophora sophorae（Arch.）is one of destructive pests of cultivated liquorice,Glycyrrhiza uralensis Fisch.The developmental threshold temperature and effective accumulated temperature of P.sophorae eggs were evaluated by effective accumulated temperature method.Chemical control techniques for P.sophorae nymphs were investigated by toxicity indoor and field efficacy trials.The results showed that developmental threshold temperature of P.sophorae eggs was（9.27±2.00）℃,and effective accumulated temperature was（574.98±21.40）day degree.Among the three tested insecticides,abamectin 2% EC had the highest toxicity to P.sophorae nymphs,with the LC50 value of 2.322 1 mg/L.Field control efficacy were over 90% to nymph of P.sophorae by broadcasting sustained-release abamectin 5% BRG at 60 kg/hm^2,harrowing soil,dispersing the gathered nymphs first,and then irrigating.The results provide a new method and technique to control P.sophorae.

关 键 词：甘草 甘草胭珠蚧 若虫 化学防治 

分 类 号：S482.3[农业科学—农药学]