Int.J.Curr.Microbiol.App.Sci (2020) 9(4): 670-673 670 Review Article https://doi.org/10.20546/ijcmas.2020.904.081 Prospects of Allelopathic Weed Management in Rice-Wheat Cropping System-A Review Simranpreet Singh Bola 1* , Davinder Pal Singh Badwal 2 , Talwinder Singh 3 and Manpreet Kaur 4 1 Department of Agronomy, Punjab Agricultural University, Ludhiana, Punjab, India 2 Department of Agriculture Sciences, Sant Baba Bhag Singh University, Khiala, Jalandhar, Punjab, India 3 Department of Agriculture, G.S.S.D.G.S. Khalsa College, Patiala, Punjab, India 4 Department of Agriculture and Farmer’s welfare, Punjab, India *Corresponding author ABSTRACT Introduction Allelopathy is a latest emerging field of science and the term 'Allelopathy' was coined by Prof. Hans Molisch, a German plant physiologist in 1937. Allelopathy is a term which includes any process involving secondary metabolites produced by microorganisms, plants, viruses and fungi etc. that alter the growth and development of agricultural and biological systems (Narwal,1994). Allelopathy focuses on becoming one of the strategic sciences to reduce the environmental pollution and to International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 9 Number 4 (2020) Journal homepage: http://www.ijcmas.com Rotation of rice-wheat cropping system is most popular in India due to its high productivity; however, these crops are highly infested by the varied weeds, thus farmers use various herbicides for their control. Resulting, this rotation consumes a large quantity of herbicides, which has resulted in severe problems like environmental and human health hazards; development of herbicide resistance in weeds etc. One of the emerging alternatives to overcome these problems is with the use of allelopathic strategies- an emerging field, including the use of weed- smothering crops for weed management and for the sustainability of agriculture. Various studies indicated that allelopathic strategies, including the use of smothering crops, could provide effective weed control in rice-wheat crop rotation and can manage weed populations at an economic threshold level without using any kind of chemicals. This may both eliminate/minimize the use of herbicides and eliminate all the major problems associated with herbicidal use. Keywords Crop rotation, Herbicide resistance, Weed smothering crops, Allelopathy, Weed management Accepted: 07 March 2020 Available Online: 10 April 2020 Article Info