نوع مقاله : مقاله پژوهشی
نویسندگان
بخش تحقیقات گیاهپزشکی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان مازندران، سازمان تحقیقات، آموزش و ترویج کشاورزی (AREEO)، ساری، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Citrus red mite, Panonychus citri is one the most important pest of fruit-bearing citrus nurseries and orchards in Iran and worldwide. In this study, the efficacy of two doses, 0.1 and 0.2 ml/l of abamectin 10% SC, 0.1 and 0.2 ml/l of abamectin 1.8% EC, 0.3 ml/l of spirodiclofen SC 24% was compared with control treatment (water) against active stages of citrus red mite. A randomized complete block design with four replications was done in Thomson orange orchards in the eastern and western regions of Mazandaran in 2021. Sampling of 50 leaves from each treatment was done one day before and 3, 7, 14 and, 21 days after treatment. The results indicated that the efficiency of the treatments of 0.1 and 0.2 ml/l of abamectin SC on citrus red mite in the western region of the province was 92.3% and 97.4% respectively, three days after treatment and 21 days after treatment was 84.7% and 89.3% respectively. The efficiency of 0.1 and 0.2 ml/l of abamectin SC on citrus red mite in the eastern region of the province in three days after treatment was 93.1% and 96.6%, respectively, and in 21 days after treatment was 76.2% and 89.6%, respectively. Due to the use of two doses of abamectin SC and other acaricides, the population of predatory mite decreased by 22-42% at 21 days after treatment. The comparison of the populations before treatment and 21 days after treatment showed that predatory mites gradually increased their populations after 21 days. No statistical difference was observed between the efficiency of two concentrations of 0.1 and 0.2 ml/l of abamectin SC on all days after treatment. We recommend the lower concentration of this acaricide (0.1 ml/l) with acceptable efficacy in controlling P. citri without inhibiting the activity of predatory mites. Therefore, it can be used in rotation with other acaricides to manage resistance in P. citri.
کلیدواژهها [English]
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