Abstract

Dendrophthoe falcata var. pubescens Hooks. f. is one of the most destructive parasites on Teak (Tectona grandis L.) plantations in Kerala. Only a few isolated attempts have been made to control this parasite chemically, due to the lack of proper chemicals and technique of application. The present study deals with the development of a simple technique of trunk injection of teak and screening of weedicides for selective killing of parasite without harm to the host. The technique of tree injection has been perfected using cheap locally fabricated matallic nozzles, distributors, plastic reservoir and dripper set. Rhodamine B, a tracer dye is introduced in the xylem to trace the path of aqueous solution in the tree. Experiments have been conducted to find out the most suitable time and month for rapid uptake of aqueous solutions. Using this technique several weedicides are tested for the selective killing of the parasite. Of these weedicides, Sencor (Metribuzin) has been found