Investigation on the efficacy of new insecticides against white flies (Trialeurodes vaporariorun and Bemisia tabaci )
2009
Sheykhi Garjan, A`ziz | Arjomandi, A`li Reza | Ja`fari Nadushan, A`li | Ghadiri Rad, Sa`id | Firuzi, Rahim | Mohammadi Pur, A`li | Javad Zadeh, Mehran | Palangi, A. | Enshaei, A.
The greenhouse whitefly, T. vaporariorum and the sweet potato whitefly Bemisia tabaci are the most important insect pests of vegetable and greenhouse crops in the world and Iran. In the modern agriculture, using insecticides is the last control method. Currently, application of effective insecticides with low residue on the crop has become an essential demand. Therefore, a one year study was carried out in four provinces of Iran to introduce the most effective pesticide(s) with least health and environmental hazards. Each treatment was applied only once either trough spraying or drenching method. The results showed that Proteus [thiacloprid, deltamethrin (1 L/ha)], Memory [thiamethoxam (0.25L/ha)], Starkle [dinotefuran (1 kg/ha)] and Calypso [thiacloprid (1 L/ha)] had highest effectiveness on the whiteflies in comparison with other treatments. The mean efficacy of Oberon (Spiromesifen) against nymphal and adult stages of the whiteflies revealed that it had the highest toxicity on the early nymphs but did not cause any mortality on the adults. Therefore, using Oberon alone is not recommended on the infested fields where there are crowds of all stages of the whiteflies. It could be concluded that all new insecticides tested during the present study with 500 ppm concentrations were effective to control whiteflies in the infested greenhouse cucumbers.
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