Control of complex weed flora in transplanted rice with herbicide mixurc

摘要

Rice (Oryza saliva L.) is one of the most important food crop of India, contributing to about 40% of total food grain production. It plays a vital role in food security and livelihood for almost every household. Out of the total 44 mha area under ricecultivation, puddled rice culture occupies 56% (Anonymous, 2005). Weeds pose a major problem in rice production as they not only compete with crop but also hinder the quality. Weed competition brings reduction in yield of transplanted rice by about 28-45% (Kumar et al. 2008, Yadav et al. 2009). Therefore, timely weed control is imperative for realizing desired level of productivity. Accordingly, an efficient and economic weed management program is necessary to control different types of weeds throughout the cropping period. Hand weeding is expensive, time consuming, difficult and often limited by scarcity of laborers in time. On the other hand, herbicides offer economic and efficient weed control if applied at proper dose and stage (Prakash et al. 2013).