بررسی اثر تیامتوکسام در ضدعفونی بذر به منظور کنترل کک مزارع چغندرقند در اول فصل در استان همدان

Sugar beet flea is one of the most important pests of sugar beet in Hamedan province, which overwintering insects at the beginning of the season cause damage to young plants and decrease yield per unit area. In the common case, two times of spraying against this pest are necessary when the plant has two leaves and six leaves. To reduce spraying and on the other hand to control the damage of this pest, seed disinfection before planting seems to be quite effective. In a study, a new formulation of thiamethoxam insecticide "FS600" was evaluated for sugar beet seed disinfection in Hamadan province. The results in the form of a randomized complete block design with three replications and five treatments including insecticides 1) Thiamethoxam FS600 with the brand name Cruiser with a quantity of 500 ml, 2) Thiamethoxam FS600 with the brand name Cruiser with a quantity of 400 ml, 3) Imidacloprid WS 70% with the brand name Dung coating in the amount of one kg, 4) thiamethoxam FS350 (Cruiser) (one liter) insecticide, 5) untreated control was done for 100 kg of seeds. From each experimental plot, 10 plants were randomly selected and the number of insects on them was counted and recorded. In Hamedan province, the percentage of effectiveness of the treatments was significant at the level of 5%, and the highest percentage of effectiveness in all three sampling times was for the treatment of thiamethoxam FS600 with the amount of 500 ml (72, 75 and 85%, respectively) and the lowest efficiency percentage for commercial seeds (less than 29%) to Receipt registration. In general, the results of this study showed that thiamethoxam FS600 insecticide with a quantity of 500 ml is suitable for disinfecting one hundred kilograms of seeds for the pests of the first season and can be included as another insecticide in the sugar beet seed disinfection basket.