Evaluation of new herbicide molecules for weed control in wet rice nursery

摘要

Use of healthy seedlings is of great importance to obtain high yields from a transplanted crop. The seedlings should have adequate amount of food materials to initiate their vigorous growth when transplanted. The weeds in rice nursery compete for nutrients and it is difficult to distinguish young grassy weeds and rice seedlings. Hence, hand weeding of grassy weeds from rice nursery is very difficult, costly and time consuming. Since hand weeding is difficult, herbicides are the obvious alternative,indispensable and cost efficient weed control practice (Chang and De Datta, 1974). In rice, the recommendation of herbicide to wet rice nursery is limited, hence study was conducted to evaluate new molecule's combinations.