مطالعه کارایی چند ترکیب حشره کش جدید روی سفیدبالک پنبه Bemisia tabaci در شرایط مزرعه‌ای

Cotton is one of the most important crops that, in addition to providing raw materials for textile and oil industries, plays an important role in creating employment in the agricultural and industrial. Cotton whitefly (Bemisia tabaci) is one of the most important agricultural pests, which is more important from the economic point of view and transmission of viral diseases compared to other whiteflies. This project was carried out in important cotton growing areas of Iran including South Khorasan, Golestan and Fars randomized complete block design with 6 treatments in 4 replications and 4 insecticides including spiromsifen (Oberon®) 480 Sc with a concentration of 400 ppm, thiacloprid 100 + deltamethrin 10 (Proteus ®) 110 OD (1000 ppm), dinotefuran (Starkle®) 20 SG (750 ppm), thiamethoxam + lambda Cyhalothrin (Haiwizer®) with a concentration of 200 and 300 ppm were compared with a control (sprinkling). For foliar spraying, a rear engine atomizer sprayer was used. For sampling, 10 plants from each plot were randomly selected, the number of nymphs and adults of whiteflies per leaf were counted 1 day before and 3, 7 and 14 days after foliar application. The obtained data were corrected according to Henderson-Tilton formula and the corrected data was analyzed using SAS software and the means were compared with Duncan's multiple range test. After analyzing the data in different regions of the experiment, the results showed that in South Khorasan there is a significant difference between insecticides treatments at 14 days after foliar application at the level of 1% and the highest efficiency are related tothiamtoxam+lambda cyhalothrin (Haivitzer® SC10%) 300ppm and dinotefuran (Starkle® 20) with an average of 86.67% and 8/72% respectively. Spiromsifen (Oberon® 480 Sc) with an average of 48.1% showed the least effect on whiteflies control. In Fars province, 14 days after foliar application, there was a significant difference between insecticides treatments at the level of 5%, with dinotefuran (Starkle®) 20 SG (750 ppm) with an average of 89.75% being the highest and Haivitzer® (200 ppm) with an average of 49.25% showed the least effect on whiteflies control. In Golestan province, no significant difference was observed in the treatments. We conclude that Ur Haivitzer® SC10%) 300ppm, Proteus® and Starkle® have the best effectiveness in controlling whiteflies and is recommended for controlling the nymphs and adults of cotton whiteflies.