Vol. 16 No. 3
Critical crop-weed competition – A pivotal factor for annual planning of weed pest management towards sustainable crop productivity
Author(s): R. K. GHOSH, A. GHOSH, D. MONDAL, S. KANTHAL AND M. K. BHOWMICK
Abstract: Eco-safe appropriate weed pest management can increase 10.0 % more production through annual planning of weed pest management. The critical crop weed competition period has an immense importance for APWPM that takes the edge of the weed pest losses in crops grown in sequence for sustainable crop production. Field experiments were conducted at the Kalyani C Block and Instructional farm, Jaguli of BCKV during 2003-18 to study the CCWCP status under APWPM with 6 treatments discretely on 21 major crops with all recommended practices including balanced nutrition. To determine the CCWC, upto 50 DAP weeds are removed by hand, whenever visible in six treatments at 10 days interval besides a weedy check. The weed density and biomass, important growth and yield attributes and yield were recorded. The results indicated that the CCWCP for all crops tested in these experiments was epitomized by maintaining minimum weed biomass upto 30 DAP excepting for onion up to 20 DAP, TR paddy 40 DAP and sugarcane 60 DAP. Therefore, following APWPM during CCWCP the productivity may be increased by an average of TR and DSR paddy, wheat, maize, black, green and Bengal gram, lentil, rapeseed, mustard, groundnut, soybean, sesame, linseed, potato, jute, sugarcane, brinjal, okra, onion and chilli, 45.0, 61.5, 36.4, 42.9, 25.6, 28.4, 40.4, 52.3, 42.5, 49.4, 36.8, 35.6, 41.8, 61.5, 30.0, 51.4, 31.8, 35.6, 32.8, 39.5 and 45.4 %, respectively in comparison to weedy check treatment due to increase of critical growth and yield parameters of respective crops.
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