Weed management by non chemical and chemical methods in greengram

摘要

There are more than 400 major weed species occurred in cultivation of arable crops and most of them have allelopathic properties which reduce the crop growth and yield. The long term use of chemical herbicides caused human health hazard and environmental pollution problems more particularly in under developed and developing countries. The integrated weed management practices specifically through habitat manipulation and exploitation of smothering and suppressing effect of crop/crop varieties throughbiochemical interaction (allelopathy) can prvide us an alternative means of weed control. Studies on the above aspects in greengram are very meagre in relation to weed control and hence, the present study was undertaken to evaluate the allelopathic plant materials/products, plant extract, and smother crop for weed management in greengram.