بررسی کارایی تله‌گذاری گودالی در شکار انبوه کرم طوقه‌بر Agrotis segetum در مزارع چغندرقند شهرستان کیار

Sugar beet cutworm or winter moth Agrotis segetum Schiffermsller & Denis. (Lep :. Noctuidae) It is one of the important pests of sugar beet at the beginning of the growing season, and sometimes its damage is significant in the following generations. One of the methods of controlling the larval population of this pest is trapping a pit in the field, and in this research, its efficiency was investigated in the conditions of the beetroot field (with an area of 5000 square meters in Qala Salim village, Kiyar city, Chaharmahal and Bakhtiari province). This farm was divided into five plots of 1000 square meters and in each plot 20 pit traps (a plastic bucket with an opening diameter of 20 cm and a height of 15 cm) were placed on the rows of crops at a distance of 25 meters from each other. Sampling was done weekly between 10:00 and 12:00 AM during the cultivation period of 2022-2023 crop year. The collected data were checked and analyzed with Excel and SAS software. The results of data analysis showed that the peak population of this pest was caught in the larval stages of the first half of July 2023, and on average, each pit trap caught 7.3 larvae during the growing season, considering the damage caused by the pest without chemical spraying, that this amount of catching is not enough to reach the population below the economic threshold, although the use of pit traps caught a significant population, but the damage of this pest was still observed in the field, therefore this method for farms that have a history of less contamination can be used as a complementary method in integrated pest management.