Drenching Treatment for the Rectification of Trunk-Borer, Anoplophora versteegi Ritsema (Coleoptera; Cerambycidae) Infested Citrus Plants

摘要

Citrus trunk-borer, Anoplophora versteegi Ritsema is majorly responsible for the citras decline in North-Eastern hilly region of India, especially in Arunachal Pradesh. Due to severe infestation, the leaves turn yellow, start drying and the plants dieslowly. The recommended practice of injecting the hole with 5 ml of 0.05% of Dichlorvos or inserting piece of cotton/cloth dipped in insecticide, petrol and kerosene and sealing it with mud was found not satisfying in rectifying the severely infested plants. An experiment was conducted comparing the recommended practice and drenching treatments of different concentrations of Monocrotophos and Dichlorvos. The basin drenhing with 10 liters of 0.5% Dichlorvos 76 EC has effectively rectified the plants in63.23 days with 79.05% success and can be recommendedonly after the harvesting of fruits for rectification of severely infested plants.