بررسی تغییرات و نوسانات جمعیت مگس میوه گیلاس، (Dip.: Tephritidae) Rhagoletis cerasi در شهرستان شاهرود، استان سمنان

Cherry fruit fly Rhagoletis cerasi (L.) (Tephritidae) is considered as the most important pest of cherry orchards in Iran and has one generation per year. The flies of Rhagoletis genus include 65 species, that the hosts of this pest in most regions of Iran are cherry and sour cherry fruits. Its major distribution including: Tehran, Alborz, Shiraz, Isfahan, Azarbaijan, Razavi Khorasan and North Khorasan Provinces. Investigation population dynamics and to determine the best application time against cherry flies is very important. As regards, population fluctuations of cherry fruit fly in Shahrood County have been less studied, in order to inve‌‌stigate population dynamics and to determine the flight peak time of the pest, a research was carried out during 2024 in the cherry orchard (6 hectares) of Agricultural and Natural Resources Research and Education Center of Semnan Province (Shahrood), Shahrood. During this research, yellow sticky cards (10 x 25 cm) with feeding attractant (Ammonium acetate, Agrisense, UK) and Mcphail traps containing feeding attractant (Ammonium acetate, Agrisense, UK) were used to capture adult. The traps were installed at a height of two meters in the south direction of the trees. The distance between the traps was at least 50 meters and twice a week at regular intervals was counted. Visiting the traps continued until the beginning of July at the same time as the end of the cherry harvest. According to the results, the first observation of cherry fly was on 11 May 2024, and the peak of cherry fly trapping happened on 15 May 2024. The last capture in the traps was on 8 June 2024. In total, both traps were caught but the highest number of trapping belonged to Mcphail trap treatments. The results of this research can be used in the design of the pest monitoring model and determining the best time of pest control in the orchards of Shahrood County.