بررسی فراوانی لیسه زالزالک Yponomeuta padella در ارتفاعات مختلف جهت نصب تله برای شکار انبوه در استان چهارمحال و بختیاری

Hawthorn ermine moth pest with a scientific name Yponomeuta padella is an important pest that in the forests of Bazoft region in the west of Chaharmahal and Bakhtiari province, and it attacks the important and valuable pasture tree species of wild hawthorn Crataegus spp. This pest destroys the greenness of the plant, weaving web, branches are extensively die back, leading to disruption of photosynthesis, attracts dust and eventually dries the tree. Four stations with different hights were selected in Bazoft area of Kohrang city in Chaharmahal and Bakhtiari province. (1600-1700 m, 1700-1800 m, 1800-1900 m and above 1900 m). The distance of each station from each other was at least 2 km. Fiberglass pheromone traps were purchased from Reha Andish Kavan Company and sex pheromones were purchased from Nikan Doost Company. The mentioned traps were installed at height of 2 meters from the ground on 10 trees at distance of at least 500 meters from each other. Trapping was done in the middle of May 2023, and the counting of the captured butterflies was done weekly. The obtained data were recorded in Excel software and frequency graphs were drawn and data analysis was done through SAS software. The results showed that the population of the pest was different in different hights and the highest frequency was related to the hight of 1700-1800 meters with an average hunt of 103.7 butterflies per trap in Sharmak region, which population was significantly higher than other hights. The frequency of hunting was lowest at the height above 1900 meters with the average hunting of 19.3 butterflies per trap. Also, the data and field observations showed that due to its high performance in mass trapping at the mentioned height, it can be very effective in control pest in pest outbreak years.