بررسی فراوانی کرم جوانه خوار بلوط (Tortrix viridana L.) در ارتفاعات مختلف استان چهارمحال و بختیاری

oak budworm Tortrix viridana L. (Lep.: Tortricidae) is one of the most important and damaging pests in oak forests which every year causes a lot of damage to the Central Zagros forests through feeding on buds and leaves and leads to tree drying in high populations. One of the appropriate methods of monitoring this pest is the use of pheromone traps. For this purpose, 5 stations with different hights were selected in Mashaikh region of Kiyar city in Chaharmahal and Bakhtiari province. (1400-1300 meters, 1400-1500 meters, 1500-1600 meters, 1600-1700 meters and above 1700 meters above sea level). The distance of each station from each other was at least 5 km fiberglass pheromone traps were purchased from Raha Andish Kavan and sex pheromones were purchased and provided from Nikan Doost Company. The mentioned traps were installed at a height of 2.5 meters from the ground on 5 oak trees with a radius of at least 500 meters. Trapping took place in the months of April and May 2024, and counting of the captured butterflies was done weekly. The obtained data were recorded in Excel software and the frequency chart was drawn and data analysis was done through SAS software. The results showed that the population of the pest was different at different hights and the most frequency was related to the hight of 1400-1300 meters with an average hunting rate of 93.3, that this population was significantly higher than other hights. The frequency of hunting was the lowest at the height of 1700 meters with an average of 7.9 butterflies per trap. Also, the data and field observations showed that the population of this pest is significantly higher in the heights near rivers and springs, and as a result, the amount of damage is higher, that requires independent research.