Effects of Bioinsecticides in Control of Greenhouse Whitefly (Trialeurodes vaporariorum Westwood) on Tomato

Abstract

The effects of commercial products of entomopathogenic fungus Beauveria bassiana(Naturalis; 0.1%, 0.2% and 0.3%), azadirachtin (NeemAzal T/S; 1% and 2%) and oxymatrin(KingBo; 0.1% and 0.2%) in the control of greenhouse whitefly (Trialeurodes vaporariorumWestwood) on tomato were tested in plastic covered greenhouse. The effects of the bioinsecticides,applied twice at five-day interval, were compared to effects of abamectin (AbastateEW; 0.075%) and thiamethoxam (Actara 25-WG; 0.05%). Tested bioinsecticides reducedthe number of larvae by 82-97% (Naturalis), 90-99% (NeemAzal T/S) and 90-96% (KingBo),with the efficacy of >96% according to Henderson-Tilton, in the assessment 16 days aftertreatment. In the same assessment, achieved percentages in adults reduction and efficacyamounted 24-89% and 67-95% (Naturalis), 85-93% and 93-97% (NeemAzal T/S), 86-96%and 94-98% (KingBo). Percentages of abundance reduction and efficacy after treatment withAbastate EW were 31% and 88% (larvae) and 64% and 84% (adults), while after treatmentwith Actara 25-WG they amounted 96% and 99% (larvae) and 83% and 92% (adults). The resultsobtained show that NeemAzal T/S, Naturalis and KingBo can be an efficient alternativeto current insecticides in control of T. vaporariorum populations.

Keywords

• T. vaporariorum
• Azadirachtin
• B. bassiana
• Oxymatrin