Thebiologicalinvestigationsweremadeinthelaboratoryandmangonurseryontheovipositionbehaviouranddevelopmentofdifferentstagesoflifecycleofmangoleafcuttingweevil,DeporausmarginatusPascoealongwithitsnaturalenemies.Femaleweevilswerematedwithmalesforlessthan30minutesandeggsweredepositedsinglyonthetenderleavesmanoeuvreingwithsnoutatsomeeggtoeggdistancefollowedbycuttingtheleaveswhichdroppedonthesoil.TheworkwasconductedthroughaseriesoffieldexperimentsinthenurserysupportedbylaboratoryexperimentsfromJanuary,2006toDecember,2008.TheexperimentswereconductedattheFruitResearchStation,Rajshahi,Bangladesh.Observationsweremadeontheoccurrenceofpredators,parasitoidsandpathogensinthelaboratoryandnurseries.Investigationswerealsomadeonanybiocontrolagentsattackingweevileggs,larvae,pupaeandadults.LeafcuttingweevilsofeachlifestagewereexamineddailyaftermaintainingthecollectionsinPetridishes.Femalelaid7.14eggspermangoleaf,usuallyonthedorsalsideofmidrib.Thedevelopmentalperiodfromeggtoadultwas435.37hours(19.06days),theeggstagelastedfor47.83hours(1.99days),thethreelarvalinstarslasted144.97hours(6.04days)andthepre-pupaandpupalstagetook93.40hours(3.89days)and171.17hours(7.13days)respectively.Theadultlongevitywas47.50daysinmaleand36.50daysinfemale.Thelarvaldevelopmentoccurredinfallentendercutleaves.washibernatedasfinalinstarlarvaduringwintermonthswhenitspopulationwasnotobservedinthenursery.Antsandspiderswerefoundtofeedonimmaturelarvaofthisinsect.Antsandspiderswerefoundtofeedontheimmaturesofmangoleafcuttingweevil,theformerbeingthemostactiveonimmatureprey.
Thebiologicalinvestigationsweremadeinthelaboratoryandmangonurseryontheovipositionbehaviouranddevelopmentofdifferentstagesoflifecycleofmangoleafcuttingweevil,DeporausmarginatusPascoealongwithitsnaturalenemies.Femaleweevilswerematedwithmalesforlessthan30minutesandeggsweredepositedsinglyonthetenderleavesmanoeuvreingwithsnoutatsomeeggtoeggdistancefollowedbycuttingtheleaveswhichdroppedonthesoil.TheworkwasconductedthroughaseriesoffieldexperimentsinthenurserysupportedbylaboratoryexperimentsfromJanuary,2006toDecember,2008.TheexperimentswereconductedattheFruitResearchStation,Rajshahi,Bangladesh.Observationsweremadeontheoccurrenceofpredators,parasitoidsandpathogensinthelaboratoryandnurseries. Investigationswerealsomadeonanybiocontrolagentsattackingweevileggs ตัวอ่อน pupaeandadults LeafcuttingweevilsofeachlifestagewereexamineddailyaftermaintainingthecollectionsinPetridishes.Femalelaid7.14eggspermangoleaf,usuallyonthedorsalsideofmidrib Thedevelopmentalperiodfromeggtoadultwas435.37hours(19.06days),theeggstagelastedfor47.83hours(1.99days),thethreelarvalinstarslasted144.97hours(6.04days)andthepre-pupaandpupalstagetook93.40hours(3.89days)and171.17hours(7.13days)respectively. Theadultlongevitywas47.50daysinmaleand36.50daysinfemale.Thelarvaldevelopmentoccurredinfallentendercutleaves.washibernatedasfinalinstarlarvaduringwintermonthswhenitspopulationwasnotobservedinthenursery.Antsandspiderswerefoundtofeedonimmaturelarvaofthisinsect.Antsandspiderswerefoundtofeedontheimmaturesofmangoleafcuttingweevil,theformerbeingthemostactiveonimmatureprey.
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Thebiologicalinvestigationsweremadeinthelaboratoryandmangonurseryontheovipositionbehaviouranddevelopmentofdifferentstagesoflifecycleofmangoleafcuttingweevil, DeporausmarginatusPascoealongwithitsnaturalenemies.Femaleweevilswerematedwithmalesforlessthan30minutesandeggsweredepositedsinglyonthetenderleavesmanoeuvreingwithsnoutatsomeeggtoeggdistancefollowedbycuttingtheleaveswhichdroppedonthesoil.TheworkwasconductedthroughaseriesoffieldexperimentsinthenurserysupportedbylaboratoryexperimentsfromJanuary, 2006toDecember, 2008.TheexperimentswereconductedattheFruitResearchStation, ชหิ Bangladesh.Observationsweremadeontheoccurrenceofpredators, parasitoidsandpathogensinthelaboratoryandnurseries.Investigationswerealsomadeonanybiocontrolagentsattackingweevileggs ตัวอ่อน pupaeandadults.LeafcuttingweevilsofeachlifestagewereexamineddailyaftermaintainingthecollectionsinPetridishes.Femalelaid7.14eggspermangoleaf, usuallyonthedorsalsideofmidrib.Thedevelopmentalperiodfromeggtoadultwas435.37hours (19.06days) theeggstagelastedfor47.83hours (1.99days ) thethreelarvalinstarslasted144.97hours (6.04days) andthepre-pupaandpupalstagetook93.40hours (3.89days) and171.17hours (7.13days) respectively.Theadultlongevitywas47.50daysinmaleand36.50daysinfemale.Thelarvaldevelopmentoccurredinfallentendercutleaves.washibernatedasfinalinstarlarvaduringwintermonthswhenitspopulationwasnotobservedinthenursery.Antsandspiderswerefoundtofeedonimmaturelarvaofthisinsect.Antsandspiderswerefoundtofeedontheimmaturesofmangoleafcuttingweevil, theformerbeingthemostactiveonimmatureprey
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