烟粉虱在三种豆科植物上的生长发育和繁殖特性.pdf

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2017-03-24 发布于广东
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烟粉虱在三种豆科植物上的生长发育和繁殖特性.pdf

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DevelopmentandReproductionofSweetpotato WhiteflyBemisiatabaci(Gennadius)(Homoptera:Aleyrodidae) onThreeBeanSpecies PeterDennisMusa (DepartmentofEntomology,CollegeofNaturalResourcesandEnvironment, SouthChinaAgric.Univ.Guangzhou,510642) Abstract SweetpotatowhiteflyBemisiatabaciGennadius(Homoptera:Aleyrodidae) isacosmopolitanpestwithworldwidedistributionindiverseecosystems.Its peststatusisgraduallybecomingaglobalconcern.InSierraLeoneB.tabaciis graduallybecomingathreattofarmerswhere65%o#theeconomyisfocused onagriculture.AsB.tabaciisfoundtodevelopresistancetoinsecticidesin additiontotheadverseeffectstheseinsecticideshaveontheenvironment, biologicalcontrolisconsideredthemostappropriateapproachtotackleits pestnature.Thoroughunderstandingofthedevelopmentandreproductionof B.tabacionitshostplantisafundamentalstepinstrategicpestmanagement ofB.tabaci.Thisresearchisdesignedtoinvestigatetheeffectsofthreebean speciessoybeanGlycinemax,gardenbeanPhaseolusvulgaris,andcowpea Vignaunguiculataonhostpreferenceandsuitability,developmentand survivorship,age-dependentfecundity,fertilitytableanddemographic parametersofB.tabacirespectively. Theinvestigationswereconductedattwoperiods:April-May2002and November2002-January2003underthesameexperimentalproceduresand conditionsexceptforphotoperiodconditions.ThephotoperiodsforApril-June andNovember-Januaryweremaintainedat14h:IOh(L:D)andlOh:14h(L: D)respectively.Twohundredadultswhiteflycollectedfromastockcolony raisedoncucumberplantsforseveralgenerationswereaspiratedinabioassay cagescontainingthethreebeanspecies.Thenumberofadultswhitefly attractedtoeachspeciesarecountedtodeterminehostpreferenceand suitabiliyt.Thenumberofeggsovipositedoneachhostspeciesarealso countedandmonitoreddailytodeterminetheeffectofthesespecieson developmentandsurvivorship,age-dependentfecundity,life-fertilitytabl