بررسی تغییرات تراکم جمعیت سوسک پوستخوار مدیترانه ای کاج Orthotomicus erosus (Wollaston) (Col.: Curculionidae) به وسیله تله فرمونی در کانونها آلوده بوستان جنگلی چیتگر

Pine trees are one of the most important trees used in beautifying the green space of different cities in the country. The most important problem of these trees in arid and semi-arid regions of the country is the outbreak of pine bark beetle, which in addition to direct damage and destruction of pine trees, Various diseases of this tree also act. According to the above, the identification of this pest in pine trees at the time of initial outbreak, knowledge of their biology and life cycle, the extent of distribution and prevalence of this pest in pine trees and also effective control strategies are very important. One of the most important and successful strategies for the management and control of skin-eating beetles in the world and according to research conducted in the country, is the use of specific cumulative pheromones and cross-type pheromone traps. In peak pest conditions, a trap can trap up to several thousand adult male and female insects in one week. In this regard, in this study, the population density of this pest in several infected centers of Chitgar Forest Park (parcels 117, 205, 222, 212, 307) in the period from April to December 1400 by pheromone traps (Eco Nex ) The type of top cross made in Spain was discussed. This experiment was considered in a completely randomized design including (infected foci) with 9 traps for each focus, which were installed on infected trees at a height of 2 meters above the ground. The results showed that the first emergence of adult insects of this pest was from the second week of April 1400 and gradually decreased until the third week of November. The peak of pests hunted by pheromone traps in summer was an average of 3577 insects in a trap in the second week of July and the lowest average of 4 insects in a trap in the third week of November and zero in December, which reached zero. It was probably the entry of the insect overwintering period and also the results showed that the highest number of insects hunted in the center of No. 4 (Parcel 222) which was in the western phase of the park, which is higher than other trap installations above sea level. Finally, it can be concluded that an approach to replace resistant, native and endomic cultivars in the long run and to deal with water stress and integrated IPM control measures in the short term to overcome pests is essential and pheromone traps attract (Eco Nex) The type of top grass produced in Spain can be very effective in controlling this pest.