摘要
2009—2010连续两年,对山西省十字花科甘蓝、萝卜和杂草上的小菜蛾Plutella xylostella(L.)种群消长动态进行了调查,并对11种杀虫剂的触杀毒力进行了比较分析。结果表明,受特殊气候条件影响,山西省2009与2010年的小菜蛾种群消长动态不太一致。2009年,田间始见小菜蛾成蛾为4月1日,虫口总量分别在4月下旬和5月下旬出现一大一小2个发生高峰,秋茬作物上没有明显的发生高峰;第一代小菜蛾卵始见期为5月8日,第一代茧始见期为5月18日,卵总量和若虫总量分别在5月13日和9月1日、5月23日和9月16日各出现2个发生高峰。2010年,田间始见小菜蛾成蛾为3月15日,虫口总量分别在4月上旬、5月下旬～6月上旬、10月中旬出现3个大小不一的发生高峰;第一代卵始见期为5月26日,第一代茧始见期为6月5日,卵总量和若虫总量分别在5月15日和9月25日、6月15日和10月10日各出现2个发生高峰。两年调查结果,蔬菜上的小菜蛾发生量均高于杂草。5%高效氯氰菊酯悬浮剂、5%氟虫氰悬浮剂和5%茚虫威乳油等11种药剂对小菜蛾幼虫的触杀毒力测定结果表明,2.5%多杀菌素悬浮剂对小菜蛾的触杀毒性最高,LD50为0.01μg/头;10%溴虫腈水乳剂、2%阿维菌素乳油和5%氟虫氰悬浮剂的触杀毒性次之,LD50分别为0.34、0.28和0.10μg/头;5%高效氯氰菊酯悬浮剂和97%巴丹可湿性粉剂的触杀毒性最差,LD50分别为91.53和84.36μg/头。
The population dynamics of the diamondback moth,Plutella xylostella（L.） feeding on 3 cruciferous plants in the Shanxi area were investigated in 2009 and 2010.Over the same period,the contact toxicity of insecticides introduced to control P.xylostella was evaluated.Differences in the population dynamics of P.xylostella between 2009 and 2010 were due to different weather conditions in these years.In 2009,P.xylostella first appeared on April 1st,two clear peaks of abundance occurred in late April and late May,respectively and there was no clear peak of abundance in the fall.The 1st generation eggs were laid on May 8th and the 1st generation pupae were found on May 18th.The total quantity of eggs and larvae peaked on May 13th and September 1st,and on May 23th and September 16th,respectively.In 2010,P.xylostella first appeared on March 15th,and three different peaks of abundance occurred in early April,late May to early June and mid -October.1st generation eggs were laid on May 26th and 1st generation pupae were found on June 5th.The total quantity of eggs and larvae peaked on May 15th and September 25th,and June 15th and October 10th,respectively.Numbers of P.xylostella on vegetables were higher than on weeds in 2009 and 2010.Contact toxicities of the 11 insecticides were tested using the leaf dipping bioassay method.The results indicate that Spinosad was the most toxic with an LD50 value of 0.01 μg/larva.Chlorfluazuron,Diafenthiuron and Tebufenozide were more toxic than the other pesticides tested,having LD50 values of 0.34,0.28 and 0.10 μg/larva,respectively.Cypermethrin and Cartap were the least toxic,with LD50 values of 91.53 and 84.36 μg/larva,respectively.
出处
《应用昆虫学报》
CAS
CSCD
北大核心
2011年第2期260-266,共7页
Chinese Journal of Applied Entomology
基金
公益性行业(农业)科研专项(200803001)
关键词
山西省
小菜蛾
消长动态
毒力测定
Shanxi
Plutella xylostella
population dynamics
contact toxicity
