Efekti insekticida na jagodinu biljnu vaš, Chaetosiphon fragaefolii (Cockerell) na otpornim i osetljivim genotipovima jagode

Strawberry aphid, Chaetosiphon fragaefolii (Cockerell), is the most important vector of strawberry virus. Breeding of genotypes resistant to this pest is an important preventive control measure, which can be compatible with rational insecticide application. The aim of the paper was to determine effects of dimethoate and deltamethrin on C. fragaefolii populations reared on two strawberry genotypes different in susceptibility: susceptible strawberry cultivar Čačanska rana and medium resistant hybrid, zf/1/94/96 (Senga Fructarina x Del Norte). Lower toxicity of deltamethrin was observed (laboratory assay) as well as lower biological efficacy of dimethoate at lower concentrations (field trial) for specimens from C. fragaefolii population reared on susceptible strawberry cultivar Čačanska rana.Biljna vaš jagode, Chaetosiphon fragaefolii (Cockerell), najvažniji je vektor virusa jagode. Gajenje genotipova jagode otpornih na ovu štetnu vrstu je značajna preventivna mera zaštite, koja može da bude kompatibilna sa racionalnom primenom insekticida. Cilj rada je bio da se utvrdi delovanje dimetoata i deltametrina na populacije C. fragaefolii gajene na dva genotipa jagode različite osetljivosti: osetljiva sorta jagode čačanska rana i srednje otporni hibrid, zf/1/94/96 (Senga Fructarina x Del Norte). Utvrđena je niža toksičnost deltametrina (laboratorijski biotest) i manja biološka efikasnost dimetoata pri nižim koncentracijama (ogled u polju) za jedinke populacije C. fragaefolii gajene na osetljivoj sorti jagode čačanska rana