بررسی تأثیر حشره‌کش اسپیروتترامات (موونتو) SC 10%و صابون حشره‌کش پالیزین® در کنترل سپردار واوی سیب Lepidosaphes malicola در استان کهگیلویه و بویراحمد

Armenian mussel scale, Lepidosaphes malicola Borchsenius (Hem.: Diaspididae), is one of the most important pests of fruit trees grown in cold climate regions, especially apple trees. Due to waxy covering of the scale insects that reduces penetration of pesticides, management of these pests using commonly used pesticides is difficult. In the present study, management of this pest by application of the treatments included spirotetramat 0.75 mL/L, Palizin® insecticidal soap 1.5 mL/L and spirotetramat 0.75 ml/L + Palizin® 1.5 ml/L were evaluated. The experiment was conducted based on the randomized complete block design with 4 replications in an apple orchard of Dashteroom, Kohgiluyeh and Boyer Ahmad province. According to emergence of about 50% of the first instar (crawlers), the treatments were applied in the middle of May. There was a significant difference among the treatments in terms of mortality percentage of first instar (F=72.85, P<0.05). According to the results, among the treatments, spirotetramat 0.75 mL/L (Mean= 97.83±5.68) and spirotetramat 0.75 mL/L + Palizin® 1.5 mL/L (Mean= 97.63±4.32) had statistically similar performance. These treatments were more effective than 1.5 mL/L Palizin® treatment (Mean= 84.18±6.02). According to the results, application of 0.75 ml/L spirotetramat treatment is more cost-effective method compared to the treatment of 0.75 mL/L spirotetramat + 1.5 mL/L Palizin due to their no significant difference in percent of the crawler mortality.