مگس‌های سفید و روش‌های ممکنه کنترول آن‌ها

Abstract

Whiteflies cause lots of damage to field crops, vegetables and trees. More than 300 species of plants are reported as host for this pest. Out of its known species, the greenhouse whitefly and the sweet potato whitefly, cause the most damage to agricultural products in greenhouses and open fields. The giant whitefly has spread in neighboring countries and is still not reported from Afghanistan. In Afghanistan, the silver whitefly or pumpkin silver leave whitefly is not well studied and it has not been identified. Whiteflies are widely distributed all over the world. In Afghanistan, it has been reported from open fields and greenhouses in all provinces. Adult and nymph of whiteflies cause direct damage due to excessive feeding of sap from the phloem of the host plant. When the pest population is three adult individuals in one leaf or 0.5 nymph of the last age in 7.6 square centimeters of plant leaves, the plants shall be treated with insecticides. the cultural control of this pest include the elimination of weeds, crop rotation, use of mulch, and the cultivation of tall plants around the host plant. The use of parasitic bees and pathogenic fungi controls the pest and the use of neem, steveot, and volck oils with cypermethrin controls about 90 percent of the pest.