摘要
以15a生南果梨为试材,通过实地监测,研究比较了辽宁省海城地区梨老、幼果园内不同虫龄梨木虱数量的消长规律;并在田间梨木虱发生的高峰时期,选用4个重要且不同类型高效杀虫剂于喷施后第3、5、10天进行详细数据分析,比较不同杀虫剂在实际防治中的效果差异。结果表明:南果梨的生长期,梨木虱呈现明显的世代重叠现象,梨木虱经历约为5代,若虫历期14～15d,约1个月1个高峰。1～3龄若虫高峰时间和虫口数分别为:5月14日467头,6月20日654头,7月18日403头,8月16日612头。4～5龄若虫在前期呈现每月1次高峰。梨树生长后期4～5龄若虫的数量下降。成虫始终保持在20头水平;幼树梨木虱数量明显多于老树;梨木虱防治效果最佳的杀虫剂为1.8%阿维菌素(2 000×)和1%苦参碱(1 000×)。
Taking 15 years old Nanguo pear as material,the growth and decline law of different instars of Psylla chinensis Yang in Haicheng region,Liaoning Province was studied and compared.Moreover,the field efficacy treated at peak period by four insecticides of high efficiency against P.chinensis 3,5 and 10 days after treated were separately investigated.The results showed that occurrence of P.chinensis about 5 generations a year,had obvious overlapping generations during the growing period of Nanguo pear.Nymph lasted 14~15 days with a peak around each month.The population size and peak occurred from 1st to 3rd instar were separately 475 nymphs on May 14th,403 nymphs on July 18th and 612 nymphs on August 16th.The nymphs from 4th to 5th instar occurred a peak each month at earlier stage and decreased in number at later stage.Adults always were maintained at around 20.Besides,the numbers of P.chinensis on young trees were much more than on old ones.Moreover,the results also showed that the control efficacy of this pest by 1.8% of avermectin（2 000×） and 1% of matrine（1 000×） were the best.
出处
《北方园艺》
CAS
北大核心
2013年第8期140-143,共4页
Northern Horticulture
基金
国家现代农业产业技术梨体系资助项目(CARS-29-08)
关键词
梨木虱
发生规律
杀虫剂
田间防效
Psylla chinensis
occurrent dynamic
insecticides
field efficacy
