两种农药对小菜蛾试验种群繁殖的影响.pdf

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1、第53卷第l3期湖北农业科学V0l_53No．132014年7月HubeiAgriculturalSciencesJu1．，2014两种农药对小菜蛾试验种群繁殖的影响周利琳，望勇，司越，司升云(武汉市蔬菜科学研究所，武汉430345)摘要：研究了甲氨基阿维茵素苯甲酸盐和茚虫威对小菜蛾(Plutella把)试验种群净繁殖率及生殖的影响。结果表明。4个甘蓝品种喷施3次甲氨基阿维菌素苯甲酸盐后。小菜蛾试验种群的净繁殖率(风)总体表现出先下降后上升的趋势；茚虫威不同浓度处理下风总体表现为随处理时间的延长而递增，以品种紫钻最为明显，药后15d其40mg／kg处理。增至55．90

2、％；小菜蛾试验种群成虫产卵量与农药的品种、浓度和药后时间有关。与各自对照相比．79．17％的处理药后4d成虫平均单雌产卵量下降。87．5O％的处理药后15d成虫平均单雌产卵量上升．喷施甲氨基阿维菌素苯甲酸盐后8d比对照上升的处理数居多，而喷施茚虫威后则相反；单一多次施用甲氨基阿维菌素苯甲酸盐和茚虫威可引起小菜蛾再猖獗，其机制可能与农药直接刺激小菜蛾生殖有关关键词：甲氨基阿维茵素苯甲酸盐；茚虫威；小菜蛾(Plutell口xyllostella)；净繁殖率；生殖中图分类号：$433．4；$482．3+9文献标识码：A文章编号：0439—8114(2014)13—3061—

3、05EfectsofTwoInsecticidesontheExperimentalPopulationReproductionofPlutellaxylostella(L．)ZHOULi-lin，WANGYong，SIYue，SISheng-yun(WuhanInstituteofVegetablesScience，Wuhan430345，China)Abstract：TheeffectsOemamectinbenzoateandindoxacarbonthenetreproductiverateandthefecundityofexperimentalpopula

4、tioninPlutellaxylostellawerestudied．Theresuhsshowedthataftersprayingemamectinbenzoateforthreetimestofourvarietiesofcabbages，thenetreproductiverates(Ro)ofexperimentalpopulationin只xylosteUadecreasedfirstandthenincreasedonthewhole．R0ofindoxaearbtreatmentsindiverseconcentrationstotallyincre

5、asedwiththeextensionoftestingtime．RoofespeciallythevarietyofZizuanat40ms／ksincreasedto55．90aftertreatedfor15d．Theeffectsofpesticidesonthefecundityofadultsinxylostellawerenotthesameduetothediferentvarieties．concentrationsofemameetinbenzoateandindoxaearb，anddaysaftersprayed．Comparedwithco

6、ntrols，themeaneggslaidperfemaleof79．17％treatmentsdropped4dafterspraying，while87．50％treatmentsincreased15dafterspraying．Treatmentsincreased8daftersprayingemamectinbenzoateweredominantinnumber．whileitwasoppositeforindoxacarb．ItisindicatedthattheresurgenceofxylosteUamightbeinducedbyonlyspr

7、ayingemamectinbenzoateandindoxacarbrepeatedly．Thereasonmightbesignificantlycorrelatedwithdirectstimulationoftheirreproductionsbythepesticides．Keywords：emamectinbenzoat；indoxacarb；Plutellaxylostella(L．)；netreproductiverate；fecundity小菜蛾(Plutellaxylostella)是一种世界性农业理想药剂E2-．63．但不科学地