Study on Different Weed Flora Composition and Distribution Pattern in Mustard (Brassica Juncea L.) under Red-Lateritic Zone of West Bengal

The understanding of the diverse weed flora composition and weed shift in crop filed is important to identify suitable weed management component to increase agro-ecosystem sustainability.The present study explains phytosociological attributes and communities structure of weeds of mustard crop under edaphic variation.Phyto-sociological analysis of weed flora in rabi 2022-23 and 2023-24 was conducted in six different blocks of Jhargram district.A total of 15 families were recognized with 25 different type of weed flora, which interfere crop growth and reduce mustard yield in red-latertic soil.Among different group of weeds, Asteraceae family belongs to largest number of weed species, while Poaceae and Cyperaceae family ranked second in terms of number of weed species within the family.Twenty five weed communities were recognized on the basis of highest importance value of three leading weed category.For each community, importance values of weed species were measured based on density, frequency and relative abundance percent.With different weed flora composition, high relative density, abundance percentage and important value index observed with the Cynodon dactylon, Oxalis corniculata.Physalis minima.Euphorbia hirta Spermacoce alata in different block of Jhargram district.Among different sedges, Cyperus rotundus had high important value index.The lowest important value index represented by Poa annua, Cirsium arvensis D. aegyptium and Blumea lacera reflects that their population quite thin in different weed community and no need very critical control measures.Moreover, control of Cynodon dactylon, Oxalis corniculata.Physalis minima.Euphorbia hirta and Cyperus rotundus become very much essential for high productivity of mustard crop in red-latertic belt of west bengal.