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1、山西農業(yè)科學2015,43(7):877—880JoumdofShanxiAgriculturalSciencesdoi:10.3969~.issn.1002-2481.2015.07.28蜂密度對玉米螟赤眼蜂寄生及繁衍能力的影響張燁,連梅力,李唐,朱文雅(山西省農業(yè)科學院植物保護研究所,農業(yè)有害生物綜合治理山西省重點實驗室,山西太原030031)摘要:玉米螟赤眼蜂是一種重要的寄生性天敵資源。為了弄清蜂密度對玉米螟赤眼蜂寄生及繁衍能力的影響,采用卡方檢驗及回歸分析對不同接蜂密度下玉米螟赤眼蜂的寄生卵數(shù)、產卵數(shù)、子代雌蜂數(shù)、出蜂率和單卵出蜂數(shù)
2、進行了研究。結果顯示,玉米螟赤眼蜂的寄生卵數(shù)、產卵數(shù)及雌蜂數(shù)并不能隨著蜂密度同等倍數(shù)地增加,且單雌寄生卵數(shù)、單雌產卵數(shù)以及單雌產雌數(shù)均隨著接蜂密度增加而降低;出蜂率在接蜂量為2—4頭時顯著大于1頭和5頭;處理組單卵出蜂數(shù)均大于1,且當接蜂密度增大時,其單卵出蜂數(shù)顯著增加。表明當接蜂密度增大,玉米螟赤眼蜂總的寄生效能及繁衍能力并不能呈同等倍數(shù)的增加,且單雌寄生及繁衍能力會隨之降低,一卵多胎現(xiàn)象會隨之增強。因此,玉米螟赤眼蜂在室內飼養(yǎng)及田間應用中應特別留意蜂密度的選擇,以增強其對寄主的控制作用。關鍵詞:玉米螟赤眼蜂;蜂密度;寄生;繁衍中圖分類號
3、:S476.3文獻標識碼:A文章編號:1002—2481(2015)07-0877—04EfectofParasiteDensityonParasitismandReproductioninTrichogrammaostrinaeZHANGYe,LIANMei-li,LITang,ZHUWen-ya(ShanxiKeyLaboratoryofIntegratedPestManagementinAgriculture,InstituteofPlantProtection,ShanxiAcademyofAgriculturalSciences,
4、Taiyuan030031,China)Abstract:Trichogrammaostrinoeisanimportantnaturalenemyresource.Inordertofigureouttheefectofparasitedensityonparasitismandreproductioninostrinae,Chi-squretestandregressionanalysiswereusedtostudyparasitecount,eggslaidcount,fe—maleofspringcount.emergencera
5、teandemergencecountperhostegunder,diferentparasitedensityinostrinae.Theresultsshowedthatparasitecount,eggslaidcountandfemaleofspringcountcouldnotincreaseinproportionwiththeraisingparasitedensity.Thecountsofparasite,eggslaidandfemaleofspringperfemaledecreasedwiththeraisingp
6、arasitedensity.EmergencerateWassiguificandyhigherwhen2to4ostrinaewereintroduced.Emergencecountperhosteginalltreatmentswasgreaterthan1.andthevaluewouldincreasewiththeraisingdensity.Itindicatedthattheeficiencyofparasitismandreproductioninostrinaecouldnotincreaseinpr0一portion
7、withtheraisingdensity.Thecapabilityofparasitismandreproductionperfemalewoulddecreaseandthephenomenonofmultiplepregnancywouldincreasewiththeraisingdensity.Therefore,efectofdensitymustbeconsideredduringrearingindoorsandreleasingoutdoorsforincreasingcontroloverhostsinostrinae
8、.Keywords:Trichogrammaostrinae;parasitedensity;parasitism;reproduction玉米螟赤眼蜂(Trichogramma