ECOLOGY OF POLYGONUM: A PREDOMINANT WEED IN TERAI AGRO-CLIMATIC REGION OF WEST BENGAL

摘要

Potygonum is a weed found in various parts of the globe and cause crop losses (Muhammad Banaras, Banaras M, 1993). They compete with crops for nutrients, light, water and space and have the ability to grow in stress conditions (Meerts and Lefebvre etal. 1998). Polygonum is a well known weed in terai agro-climatic region of West Bengal. Locally it is known as "Biskanthali". Previously in general it was seen in wet, swampy area near ditches but not it has shown tendency of invading crop fields also and become a problematic weed in field crops. During the period of 2002-2003 the ecology of the weed species was studied in the above said region.