Rice is a major crop in Banka district, which grows maximum area of cultivable land in Kharif season. Weeds are major problem in rice cultivation, especially grasses and broad leaved weeds creates problem in paddy cultivation. Serious problem occurring in cultivation of paddy as given below.
(i) Disease and pest infestation.
(ii) Loss of yield through weed infestation as 20-50%
(iii) Cost of cultivation is high.
(iv) High nutrient requirement through organic and inorganic fertilizer