بررسی کارایی روغن امولسیون‌شده در مبارزه زمستانه علیه سپردار واوی سیب Lepidosaphes malicola در استان کهگیلویه و بویراحمد

Horticultural oils including emulsified oils have been used as part of Integrated Pest Management (IPM) systems for control of some pests. These products demonstrate low toxicity to mammals, minimal impact on beneficial insects. They may create a physical barrier to respiration by blocking the spiracles or air holes of adult and larvae abdomens or inhibit oxygen uptake of eggs and decrease egg hatching rate. Sometimes, oils may interacting with cell membranes and the fatty acids and interfering normal metabolism of the pest. To management of Armenian mussel scale, Lepidosaphes malicola a research conducted in in Kohgiluyeh and Boyer-Ahmad province. In this study we evaluate dormant oils to decrease of overwinter population of this pest. In two apple orchards in Dashtroom and Kakan (Loated in Boyer Ahmad ounty), the 1.5% emulsified oil (Volk®) was applied in late of the first week of March and Middle of March, respectively. The efficacy of the treatment was evaluated by percent of egg mortality. Egg mortality percentage in Dashtroom and Kakan were 37.64±2.86 and 31.83±3.95, respectively. The results showed that in apple orchards with high population of Armenian mussel scale, it can reduce the initial population in the next growth season, but it would not be the considered as the only management strategy in these gardens. In the gardens with high density of Armenian mussel scale application, winter application could not be sufficient and it will be need to apply some effective pesticides in growth season, too.