幼蟲密度對(duì)馬鈴薯塊莖蛾生長發(fā)育及繁殖的影響

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1、昆蟲知識(shí)ChineseBulletinofEntomology2010，47(4):694～699幼蟲密度對(duì)馬鈴薯塊莖蛾生長發(fā)育*及繁殖的影響12111馬艷粉胥勇李娜李正躍何月秋肖春(1.云南農(nóng)業(yè)大學(xué)植物保護(hù)學(xué)院昆明650201;2.云南省德宏州種子管理站潞西678400)Effectoflarvaldensityongrowth，developmentandreproductionofpotatotubermoth，Phthorimaea121111operculella.MAYan-Fen，XUYong，LINa

2、，LIZheng-Yue，HEYue-Qiu，XiAOChun(1.CollegeofPlantProtection，YunnanAgriculturalUniversity，Kunming650201，China;2.DepartmentofSeedManagementofDehongCity，Luxi678400，China)AbstractTheeffectoflarvaldensity(5，10，15，20，25and30larvae/tuber)onthegrowth，developmentandreproduct

3、ionofoffspringofthepotatotubermothPhthorimaeaoperculellaZellerwasinvestigatedunderlaboratoryconditions.Theresultsshowthatlarvaldensitysignificantlyaffectedgrowth，developmentandreproduction.Thedurationoflarval(7.1－9.1d)，andpupal(8.8－9.9d)stages，andadultfemaleandmale

4、lifespans(6.7－11.6d，6.4－12.9d，respectively)，waslongerathigherlarvaldensities.Larvalsurvival(70.3%－93.3%)andpupalemergence(69.8%－91.7%)weresignificantlylowerathigherlarvaldensities.Pupalweight(9.2－11.4mg)，thenumberofeggsperfemale(136.8－166.0)andtheratiooffemales∶mal

5、es(0.54－2.17)decreasedwithincreasinglarvaldensity.Increasedlarvaldensityalsoaffectedthelifehistoryofoffspring;offspringofinsectsraisedathighlarvaldensitieshadlongeregg(3.0－4.4d)，larval(6.2－10.8d)，pupal(8.1－10.0d)，andadultstages(female=7.4－11.8d，male=6.6－10.5d)，anda

6、longeroverallgenerationtime(24.4－36.1d).However，theyalsohadlowerhatching(73.1%－79.0%)，larvalsurvival(55.0%－96.8%)，pupalemergence(63.3%－93.3%)andoverallsurvival(25.6%－75.1%).Theoffspringofinsectsraisedathighlarvaldensitieshadlighterpupae(8.9－9.9mg)，alowerfemale∶male

7、ratio(0.45－2.20)andfewereggsperfemale(93.5－155.6).Theindexofpopulationtrend(Ⅰ)decreasedfrom76.43－7.44withincreasinglarvaldensity.Theoptimaldensityofpotatotubermothswas1larvae/13.0－26.0gtuber.KeywordsPhthorimaeaoperculella，density，growth，development，reproduction摘要室內(nèi)

8、觀察了塊莖中不同蟲口密度(5、10、15、20、25、30頭/塊莖)對(duì)馬鈴薯塊莖蛾P(guān)hthorimaeaoperculella(Zeller)生長發(fā)育、后代發(fā)育和繁殖的影響。結(jié)果顯示:幼蟲密度顯著影響馬鈴薯塊莖蛾的生長發(fā)育及繁殖。對(duì)其生長發(fā)育影響的結(jié)果表明:幼蟲的發(fā)育歷期(7.1～9.1d