بررسی نوسانات جمعیت کرم خوشه خوار انگور Lobesai botrana با استفاده از تله‌های فرومونی در استان چهارمحال و بختیاری

One of the key pests of grapes in Chaharmahal va Bakhtiari province is the grape berry moth Lobesia botrana, that in several stages by feeding the fruit causes a lot of damage to this product. The use of pest-attracting sex pheromones is one of the most important tools for determining the time of appearance, peak of flight and estimating the number of pest generations. For this purpose, three separate gardens with a distance of 10 km from each other, each with an area of 5 hectares were selected and 3 Delta pheromone traps from Raha Andish Kavan company with a sex pheromone made by Tabiat Doust Nikan Company were installed at a distance of 100 meters from each other in the fourth week of April 2018 and 2019 in each garden. The traps were installed at a height of 1 to 1.5 meters above the ground, in a north-south direction. Counting and recording was done every three days. Traps and pheromones were replaced monthly. Insects were counted in the early morning hours. The results of flactuations moths hunted by traps showed that this pest had three generations in Chaharmahal va Bakhtiari province in both years of this study that the hunting peak of the first generation of the male pest was in 2018, May 20, and in 2019, May 25; the second generation was identified in 2018, July 5, and in 2019, July 7; The third generation of the pest was determined in 2018, 18 August and in 2019, 22 August. Examination of pest damage in different generations showed that the pest damage was significant in the first generation to flowers and in the second generation to sour grapes; but damage in the third generation to ripe fruit was less. The results of this study can be used in the integrated management program against this pest and chemical control methods in the first and second generations against the larvae of the pest with permitted pesticides can be recommended.