بررسی تغییرات جمعیت شپشک ستاره‌ای انجیر Ceroplastes rusci (L.) و کنه تارتن انجیر Eotetranychus hirsti Pritchard and Baker در منطقه پلدختر استان لرستان

Fig (Ficus carica L) is an important harvest worldwide for its dry and fresh consumption. Iran is the fifth largest producer of this product in the world. Lorestan province has the second rank in fig production and has the highest production of black figs in Iran. Meanwhile, Poldokhtar produces more than 85% of figs in Lorestan province. Knowing the habitat and life cycle of pests forms the basis of pest population control knowledge, and its application in pest control operations brings favorable environmental and economic achievements for society. Fig orchards in the south of Lorestan province face a high density of the Fig Wax Scale Ceroplastes rusci (Linnaeus) (Homoptera: Coccidae) and the Fig Spider Mite Eotetranychus hirsti Pritchard and Baker (Acari: Tetranychidae) every year. Mass changes of the FWS and FSM populations were carried out from April to January 2019 by sampling (every 10 days) from a fig orchard with an area of 2000 m2 located in Jolga olia village, 21 km north of Poldakhtar. In the survey, it was observed that the FSM started its activity on the trees at the end of spring and reached its peak population in the middle of July. During the summer, it showed several population peaks and finally stopped its activity on fig leaves in the middle of autumn. FWS appeared later than the mite on fig trees and rapidly increased its population during June so the largest population of this pest during this period was seen at the end of June. Then the trend of changes in the population of this pest started a downward trend and reached its lowest level in the middle of August. From the beginning of September, the population of FWS increased and this trend continued until the middle of this month, and the second population peak of this pest was recorded at this time. After that, the trend of the population started to decline again and ended its activity on fig leaves at the end of October.