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Chemical weed control in chilli + onion intercropping system

An investigation entitled “Chemical weed control in chilli + onion intercropping system” was carried out at the Vegetable Division in Kittur Rani Channamma College of Horticulture, Arabhavi, University of Horticultural Sciences, Bagalkot (Karnataka) during Kharif season of 2014 and 2015 on well drained red loamy soil to find out the suitable approach (herbicides+cultural practices) for weed management and for improving the productivity of chilli+onion intercropping system. Observations on weed control treatments showed marked difference among weed, growth and yield parameters in chilli and onion. Among the different chemical treatments, pre-emergent application of alachlor @ 1.5 kg ai/ha + 2 HW at 45 and 60 DAT (T4) recorded the lowest pooled dry matter of weeds (1.97 g), lowest population of monocot (3.68) and dicot weeds (3.11) and thus exhibited the highest weed control efficiency (93.04%). Unweeded check recorded highest weed population (13.16) and weed dry weight (7.47 g). Significantly higher yield per ha of green chilli(253.41 q) and onion (221.26 q), net returns (Rs.2,14,413) and B:C ratio (3.4) was recorded in T4 followed by pendimethalin @ 1.5 kg ai/ha + 2 HW at 45 and 60 DAT. | International Journal of Current Microbiology and Applied Sciences ISSN 2319-7706 Volume 8 Number 01 2019 Journal homepage http www.ijcmas.com Original Research Article https doi.org 10.20546 ijcmas.2019.801.332 Chemical Weed Control in Chilli Onion Intercropping System Vilas D. Gasti and Snehasish Chakravorty Department of Horticulture and Post-harvest Technology Palli Siksha Bhavana Institute of Agriculture Sriniketan Visva-Bharati West Bengal - 731236 India Corresponding author ABSTRACT Keywords Chilli onion intercropping Weed control treatments and B C Ratio Article Info Accepted 26 December 2018 Available Online 10 January 2019 An investigation entitled Chemical weed control in chilli onion intercropping system was carried out at the Vegetable Division in Kittur Rani Channamma College of Horticulture Arabhavi University of Horticultural Sciences Bagalkot Karnataka during Kharif season of 2014 and 2015 on well drained red loamy soil to find out the suitable approach herbicides cultural practices for weed management and for improving the productivity of chilli onion intercropping system. Observations on weed control treatments showed marked difference among weed growth and yield parameters in chilli and onion. Among the different chemical treatments pre-emergent application of alachlor @ 1.5 kg ai ha 2 HW at 45 and 60 DAT T4 recorded the lowest pooled dry matter of weeds 1.97 g lowest population of monocot 3.68 and dicot weeds 3.11 and thus exhibited the highest weed control efficiency 93.04 . Unweeded check recorded highest weed population 13.16 and weed dry weight 7.47 g . Significantly higher yield per ha of green chilli 253.41 q and onion 221.26 q net returns Rs.2 14 413 and B C ratio 3.4 was recorded in T4 followed by pendimethalin @ 1.5 kg ai ha 2 HW at 45 and 60 DAT. Introduction Weeds are unwanted and undesirable plants that interfere with utilization of land and water resources and thus adversely affect crop production and human welfare. They are often