Aphidophages of the Black Sea coast of the Krasnodar territory and their role in regulating the number of pests
Year: 2025
Type: article
Abstract: Background.The climaticandfloraldiversityof the biocenosisof the Lazarevskydistrictof the resortcityof Sochiservedto forma uniquespeciescompositionofPalearctic,subtropicalandtropicalentomofaunainthe region.Astablesymbiosisof the aphidcomplexandtheirnaturalpredatorsandparasiteshas been formed.During theperiodof rapidincreasein the numberofphytophages, the controlbioagentsweresyrphidlarvae,chrysops(upto 77eggsinthe egg),coccinellidlarvaeandimagos(upto 70larvaeand4imagosperplant),larvaeof aphidimizagallica(upto 17individualsperleaf). Purpose:to studytheaphidophages of the Black Seacoastof the KrasnodarTerritoryandtheirroleinregulatingthe numberof pestsinthe agro-cenoses of the Lazarevskydistrictof Sochi. Materials and methods.Phytosanitaryinspectionwas carriedout inthe springand summerperiod-4timesamonth,inautumnand winter-2timesamonth.The choiceof the registration dateduring thegrowingseasonwas determinedby the appearanceof the firstphytophagousindividualsafterwintering.Identificationof the identifiedphytophageswas carriedout inthe laboratoriesof the stationaccordingtogenerally accepted methods(MarshakovV.G.,1985).Mathematicaldataprocessingwas carriedout usingMSExcel.Innaturalandartificialbiocenoses, coccinellides showedthe greatesteffectiveness. Results.For the first time in 2021-2024, the role of phytophages in regulating the number of pests in the agrocenoses of the Black Sea coast of the Krasnodar Territory was assessed. The averagebiologicalefficiencyof entomophageswas80 %.Inuncontrolledopengroundconditions, harmony was the bestbioagentfor aphidcontrolwithan efficiencyof95 %.Highpredationresultswere shownby nativepredators-polyphagesmacrolophusanddicyphus.Theirbiologicaleffectivenessinthe closedgroundaveraged70 %witha predatorratio:The victimis 1:30.The useof laboratorypopulationsof specializedparasitesof lisiflebusandaphidiusincontrolledindoorconditionsshoweda parasitization rateof upto 84 %. Conclusion.Insufficienteffectivenessof naturalaphidophageshas been revealedwhentheyare usedasa mono-agentof aphidbiocontrol.Significantlyhigherresultswere shownby the simultaneoususeof a complexofaphidophages consistingofcoccinellides,syrphides,halidesof aphidimysis,macrolophusanddicyphus.As aresultof studieson the toxicityof the mostcommoninsecticidesandfungicidesagainstentomophages, the negativeeffectof somedrugsonthe furtherdevelopmentof insectshas been revealed.Adecreasein thenumberof pupatedlarvaewas recorded from34.7 %to37.9 %anddepartedimagoharmoniafrom29.9%to33.6%.The mosteffectivedrugswere identifiedbasedon the entomopathogenicfungiBeauveriaandLecanicillium found inthe region,which showedan efficacyof upto 90 %.
Authors: Evgeniya V. Kashutina, Ludmila N. Bugaeva, Tatuna N. Ignatieva
Language: English
Subfield: Insect Science
Domain: Life Sciences
SDGs: Zero hunger, Life on land
Open Access status: gold
Estimated APC paid: $350
OpenAlex ID: W7083174246