Effect of Chemical and Cultural Methods of Weed Control on Transplanted Rice

Abstract

Machete granules and Stam-F, 34 are very effective to control the weeds in tran- splanted rice when they are supplemented with one hand weeding 5 weeks after plant- ing. The herbicides lack residual activity and do not control effectively the regeneration of particularly perer.nial weeds. Machete granules at 2.5 kg a. l/ha is more effective and economical than Stum F-34 at 3.0 ka a. I. / ha individually and in combination with one hand weeding.