The potential of local populations of (Encarsia formosa Gahan) in biological control of greenhouse whitefly (Trialeurodes vaporariorum Westwood) in Serbia
2015
Drobnjaković, Tanja (Institue of Pesticides and Environmental Protection, Belgrade (Serbia)) | Prijović, Mirjana (Institue of Pesticides and Environmental Protection, Belgrade (Serbia)) | Perić, Pantelija (Institue of Pesticides and Environmental Protection, Belgrade (Serbia)) | Milenković, Slobodan (Fakulty of Biofarming, Bačka Topola (Serbia)) | Stamenković, Svetomir (Faculty of Agriculture, Lešak (Serbia))
The present study investigated the biological parameters (development time, longevity, parasitism, adult emergence and instantaneous rate of increase) of females from two local populations of Encarsia formosa Gahan and a commercialized race of the parasitoid (Dutch strain). The representative local populations of E. formosa were set up from pupae collected from vegetables and ornamentals grown in tunnel greenhouses in localities without a tradition in using commercial strains of the parasitoid for biological control of the greenhouse whitefly. The two local populations and the Dutch strain were reared on tobacco plants infested with whiteflies. The laboratory conditions included: t°C 26±2, RH 60±10% and L:D=16:8. The data showed that parasitoid females of the local Bujanovac population had the best results of longevity (10.14±0.21 days), parasitism of the host (175.09±3.81 pupae/female), adult emergence (148.76±4.74 adults/female) and instantaneous rate of increase (0.332±0.002 female/day). Compared to the local Negotin population and Dutch strain females, those from Bujanovac had significantly higher statistical values of parasitism and adult emergence, which were the most important indicators of biological efficacy. The results make a starting point for further evaluation of local populations of the parasitoid as a potential biological agent.
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