Evaluation of three herbicides for the control of grasses in rices

Abstract

Increased rice yield was obtained when the predominant grasses infesting rice fields in the Murrumbidgee irrigation areas of New South Wales were effectively controlled. Ordram (ethyl hexahydro-1 H-azepine-1-carbothioate) applied at pre-sowing and at post-emergence of the rice and grass, gave excellent control of grasses. Propanil, applied to vigorously growing barnyard grass in its 2-3 leaf stage of development, also gave very effective control. Ordram, applied at pre-sowing at less than two inches from the germinating rice seed in the soil of applied at pre-emergence in the water when the plumule of the germinating seed had to grow through the herbicide treated soil, reduced the density of the stand or the vigour of the rice seedlings.