بررسی کارایی حشره‌کش ایندومکتSC9% ) امامکتین بنزوات + ایندوکساکارب ) در کنترل طوقه‌بر چغندرقند Agrotis segetum Denis & Schiffermuller(Lep.:Noctuidae)

The turnip moths, Agrotis segetum Denis & Shiffermuller (Lep.: Noctuidae) damage the sugar beet field at the beginning of the season. Therefore their control is very important to maintain plant density per unit area. Chemical control is one of the main components of pest management in outbreak condition. In the past years, farmers sprayed the bait with sevin insecticide to control the mentioned pest. Due to the prohibition of using this insecticide, it is necessary to register new insecticides with different mode of action and low-risks. This study, investigated the efficacy of four different insecticides against A. segetum in sugar beet fields in West Azarbaijan (Khoy). The insecticides including indomect® (SC9%) in concentrations of 400 ml/hec, ruby® (SC10%) 100 ml/hec, alice® (EC10%) 100 ml/hec and chemical insecticide chlorpyrifos (EC40%) 1.5 L/hec were tested against turnip moth. The experiment was conducted as a randomized complete block design with 4 replications. Samplings were done one day before treatment and 3, 7 and 10 days after treatment. The mortality of the larvae was corrected by Henderson Tilton method, then analysis using GLM method and with the SAS program. The results of this study showed that the effectiveness of the investigated insecticides was higher than 65%. This was despite the fact that indomect was the most effective in all samplings. Indomect insecticide was the best in spray application on the 10th day after spraying (with an average of 96.2± 2.21%) and classified in a group and two other insecticides, rubi 100 and alice (83.35 ± 2.41 and 77.07± 3,93% respectively), were ranked in the b group. The lowest efficiency was recorded for chlorpyrifos, with 64.6±4.87% on the third day after spraying. Based on this, it can be said that all three new insecticides, despite having a small difference in efficiency with each other, are recommendable for the control of turnip moth in the sugar beet field.