Effect of Spiromesifen (Oberon®) in mixing with neem formulations on the 3rd instar nymph of Trialeurodes vaporariorum (Westwood)
Paper ID : 1939-24IPPC (R2)
Authors
1Department of Plant Protection, Agricultural Faculty, Urmia University, Iran
2Agricultural Entomology, Department of Plant Protection, Faculty of Agriculture, Urmia University
3Plant protection department, Agricultural and natural resources research center of west Azarbaijan.Areeo.Urmia.Iran
Abstract
Trialeurodes vaporariorum (Westwood) is one of the most important pests of ornamental and edible plants. This pest reduces photosynthesis and damage to plants by feeding on plant sap and secretion of honey. Inhibition of whiteflies in integrated management program is based on agronomic methods (use of resistant host plants and weed control), mechanical (application of various traps, especially colored sticky traps), chemical and biological methods. Due to its large number of generations, this pest has the potential to resist all types of insecticides. One of the solutions to reduce the adverse effects of pesticides on various agricultural ecosystems is the use of low-risk compounds such as vegetable oils such as neem (Azadirachta indica A. Juss.) with pesticides. In this study, the susceptibility of 3rd instar nymph of whitefly to spiromesifen insecticide alone and in combination with three commercial formulations of neem including kofa, nimazal and nimbecidine in greenhouse conditions with photoperiods 16: 8 hours (light: dark), temperature 27±3 Celsius and relative humidity 65±5% was investigated. The bioassay method used was leaf dipping. The LC50 value of spiromesifen, kofa, nimazal and nimbecidine on 3rd instar nymphs after 24 hours 554.66, 1520.97, 1065.78 and 870.23 mg /liter. A lethal concentration of 25% was used to investigate the mixing of spiromesifen with kofa, nimazal and nimbecidine 3rd instar nymphs. A lethal concentration of 25% was used to investigate the mixing of spiromesifen with kofa, nimazal and nimbecidine on third instar nymphs. In evaluating the synergistic properties of neem compounds with spiromsifen toxin, the results showed that this toxin in combination with nimbusidine plant composition had the highest lethal effect (68%) compared to the combination with nimbecidine (55%) and kofa (53%) on 3rd instar nymph of whitefly. He is the third age of Sefidbalak. Therefore, in integrated management of this pest to reduce the pesticides and adaptation of neem plant pesticides to the environment, mix spiromesifen with nimbecidine on 3rd instar nymphs of whitefly is recommended.
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