ارزیابی اثر آبامکتین، سولفور مایع و مخلوط آبامکتین و سولفور مایع روی کنه تارتن انجیر Eotetranychus hirsti در شرایط آزمایشگاهی

Fig spider mite, Eotetranychus hirsti Pritchard & Baker (Acari: Tetranychidae), is one of the most important pests of fig in Estahban county (Fars province). This mite reduces the yield of the tree and quality of the product by feeding on plant cells sap and web spinning. With this in mind, reduction the damage of fig spider mite is important by selection the appropriate pesticide in the least concentration and highest mortality rate on pest with no bioremediation on fruits and environment. In this regard, acaricidal effects of abamectin, liquid sulfur and mixture of abamectin and liquid sulfur were studied in order to determine the amount of lethal concentration of 50% (LC50) and their synergistic effects on this mite. Completely randomized design with six treatments and four replications were used by leaf dip method. The test was carried out in germinator at 28 ± 2°C, 55 ± 5% relative humidity and 16:8 h photoperiod. The mortality of uniform age of adult female mites recorded after 24 hours. The LC50 values for abamectin, liquid sulfur and mixture of abamectin and liquid sulfur were 9.30, 649.76, 0.13 μL/L respectively. The results of bioassays showed that abamectin has more significant mortality effect on this acari than liquid sulfur and the most mortality effect was obtained by mixture of these compounds. On the other hand the synergistic ratio of this mixture was obtained 71.54 and it showed the meaningful synergistic effect on fig spider mite and it showed that mixture of them was more effective on this mite than each of component separately.