03 Sep 7 Major Pests of Mandarin Orange in North Eastern Hill Regions of Darjeeling and Sikkim and their Management
दार्जिलिंग और सिक्किम के उत्तर पूर्वी पहाड़ी क्षेत्र में मेंडारिन ऑरेंज के 7 प्रमुख कीट तथा उनका प्रबंधन Major insect pests problematic to mandarin orange in North Eastern Hill regions of Darjeeling and Sikkim are leaf miner, citrus psylla, citrus fruit sucking moth, citrus stem borer etc. These major insects and their management are as following- 1. Citrus leaf miner (Phyllocnistis citrella): It is a common pest of citrus crops in India. The adult of this pest is a minute silvery white or greyish moth. Usually leaf miner is more active during their growth period i.e., in spring and rainy seasons. Tender leaves are attacked and leaf miner larvae feed on the epidermis, producing silver coloured serpentine mines, generally on the lower surface. Often the tiny caterpillars/grubs are found in them. Larvae also attack the tender branches where they mine under the epidermis. Both young and old trees are affected but the damage to young plants is more serious. A heavy attack may lead severe defoliation. The infested trees are devitalized and look sickly. Leaves which are mined also serve as loci of infection for citrus canker disease. Management: Chipping and destruction of mined leaves in the primary stage reduces insect infestation. Timely sprays of Dimethoate @ 2ml/L of water or Profenofos @ 2-3ml/L of water or Thiamethoxam...