資源描述：
《抗蟲棉---玉米間作對昆蟲種群動態(tài)影響》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在應(yīng)用文檔-天天文庫。
1、....頁眉抗蟲棉—玉米間作對昆蟲種群動態(tài)的影響摘要為探究抗蟲棉與玉米間作對棉田害蟲及其天敵種群動態(tài)的影響，采用3點(diǎn)取樣法，自2013年6月3日至10月11日，每5天調(diào)查一次間作棉田及對照棉田的主要害蟲及其天敵的種群數(shù)量。調(diào)查結(jié)果表明：抗蟲棉玉米間作不利于部分非靶標(biāo)害蟲的發(fā)生，尤其是對棉葉螨、斑須蝽、盲蝽和潛葉蠅的抑制作用較明顯，種群數(shù)量明顯減少，且發(fā)生平穩(wěn)，沒有大的爆發(fā)；而對粉虱、棉葉蟬、棉蚜、薊馬、蹺蝽的作用不明顯，只是數(shù)量上間作棉田比單作棉田略微減少；間作模式下棉鈴蟲的落卵量顯著減少，但棉鈴蟲幼蟲和成蟲數(shù)量卻高于單作棉田。玉米間作可以增加棉田天敵數(shù)量，尤其是草蛉、龜紋瓢蟲和異色瓢
2、蟲的表現(xiàn)最突出，發(fā)生量明顯高于單作棉田；蜘蛛類天敵數(shù)量略多于單作棉田，食蚜蠅數(shù)量與單作田持平，小花蝽卻少于單作棉田。從總體上說，抗蟲棉與玉米間作可以有效減輕抗蟲棉田害蟲的發(fā)生，增加天敵種群數(shù)量，可以作為一種有效的種植模式在大田推廣。關(guān)鍵詞：抗蟲棉，玉米，間作，種群動態(tài)....頁腳.....頁眉EFFECTSOFINSECTRESISTANTCOTTONANDCORNINTERCROPPINGONTHEPOPULATIONDYNAMICSOFINSECTSABSTRACTTostudytheeffectofinsect-resistantcottonandcornintercroppin
3、gonthepopulationdynamicsofinsectsandnaturalenemies,thisexperimentbeganinApril15.By3pointsamplingmethod,fromJune3,2013toOctober11,eachthe5dayinvestigatedthepestsandnaturalenemypopulationsofintercroppingcottonandthecontrolofcotton.Thetestresultsshowedthat:thecottonintercroppingcornwasnotconducivet
4、osomenontargetpests,especiallyoncottonspidermites,Dolycorisbaccarum,Miridaeandleafminer,whichhappenedsmoothlyandnomajoroutbreaks,withthepopulationdecreased.But,theeffectsofwhiteflies,leafhoppers;cotton,cottonaphid,thrips,stiltbugswerenotobvious,justthenumberofintercroppingcottondecreasedslightly
5、thanmonoculturecotton;Theeggsofintercroppingcottonweresignificantlydecreased,butthenumberoflarvaeandadultswashigherthanmonoculturecotton.Intercroppingcorncouldincreasetheamountofnaturalenemies,especiallytheprominentlacewing,Propylaeajaponica,andHarmoniaaxyridis,whoseoccurrencewassignificantlyhig
6、herthanmonoculturecotton.But,spiderspecies,numberwasslightlymorethanmonoculturecotton,andSyrphidae,snumberdonotchange,andOriueswaslessthanmonoculturecottonfield.Fromsayonthewhole,insect-resistantcottonintercroppingcorncouldeffectivelyreducetheinsectresistant....頁腳.....頁眉cottonpests,andincreasedn
7、aturalenemiespopulation,itcouldbeusedasaneffectiveplantingmodeinfieldapplication.KEYWORDS:insect-resistantcotton,corn,populationdynamics,intercropping....頁腳.....頁眉目錄摘要IABSTRACTII目錄IV第一章文獻(xiàn)綜述11.1抗蟲棉概述11.2當(dāng)前抗蟲棉所面臨的的問題21.3間作對棉花害
