Herbicide Control of Coppicing in Teak

Abstract

1. The effectiveness of various herbicides on repressing growth of coppice shoots of teak (Tectona grandis L.) stumps was studied, since such control is important following thinning operations in teak plantations in Trinidad. 2. The sodium salt of 2,4-dichlorophenoxyacetic acid (2,4-D) in water, the butyl ester of 2,4-D in water, the sodium salt of trichloroacetic acid (TCA), and sodium tetraborate were only partially effective. The butyl ester of 2,4-D in a dieseline oil carrier, the butyl ester of trichlorophenoxyacetic acid (2,4,5-T) in both a water carrier and a dieseline oil carrier, and the triethanolamine salt of 2,4-D were completely effective in repressing growth of coppice shoots. 3. It is suggested that, in order to control coppicing of teak stumps, either a 2% solution of 2,4,5-T in an oil carrier or a concentrated solution of the triethanolamine salt of 2,4-D should be sprayed on the cut surface and sides of teak stumps by knapsack sprayer during the first week after the trees have been cut.