AGROECOLOGY OF MAJOR CROPS AND THEIR WEEDS IN BANGLADESH

Abstract

The Climate, soil types, agricultural seasons and the major crops of Bangladesh are briefly introduced. The interaction of
crop duration and the climatic factors are graphically presented. Agroecological condi tions over which the major crops and
their associated weeds are grown have been mentioned. The important weeds of major crops are commented on and acrop-
wise list is appended. The species of great importance common to the whole country include Cyperus rotundus, Cynodon
dactylon, Echinochloa crusgalli, Echinochloa colonum, Chenopodium album, Fimbristylis miliacea, Cyperus iria and
Eicchornia crassipes. Two parasitic weeds newly introduced in the country, Striga densiflora and Orobanche indica are
causing severe damage to sugarcane and mustard respectively.