Document Type : Original Article


Department of Agronomy, Forages and Grassland Management COA, CSK Himachal Pradesh Krishi Vishwavidyalaya, Palampur 176 062, HP, India


Over centuries, agricultural practices have undergone the transition from extensive and traditional to intensive and specialized. Thus, the weeds colonizing cultivated fields are subjected to major shifts due to increased use of herbicides, fertilizers and tillage. There are a total of 176 weed species in Agro-ecosystems of Himachal Pradesh and not less than 46 in maize. Weeds, in maize, are hardier in nature and compete with the crop significantly reducing its yield. Also, slow initial growth and wider spacing favour the growth of weeds even before crop emergence. Commelina benghalensis, Ageratum conyzoides, Echinochloa colona, Panicum dichotomiflorum, Cyperus iria, Digitaria sanguinalis, Polygonum alatum and Aeschynomene indica were dominant weeds observed under Kangra district conditions of Himachal Pradesh. The phytosociological study showed that the species which invaded the non-cropped lands are increasingly infesting the cultivated fields. In 2008, most abundant weed was Fimbristylis miliacea followed by Cyperus difformis, Eragostis tennela, Ageratum conyzoides, Ammannia baciferra, Bidens pilosa and Hackelia uncinata. In 2018, Ageratum conyzoides was the most abundant followed by Phyllanthus niruri, Panicum dichotomiflorum, and Commelina benghalensis. Ageratum conyzoides was the most important weed in 2008 followed by Echinochloa colona, Fimbristylis miliacea, and Digitaria sanguinalis, in that order. The Important Value Index (IVI) for individual weed species in the maize field crop in 2018 indicated that Ageratum conyzoides was again the most important weed species followed by Phyllanthus niruri, Echinochloa colona, Alternanthera philoxeroides, Aeschynomene indica, Commelina benghalensis and Digitaria sanguinalis. The weed species viz. Ammannia baccifera, Bidens pilosa, Brachiaria ramose, B. reptans, Dactyloctenium aegyptium, Fimbristylis miliaceaum, Galinsoga parviflora, Hackelia uncinata, Ipomoea pestgridis, and Physalis minima those recorded in 2008 were not found in the survey of 2018. Aeschynomene indica, Alternanthera philoxeroides, Amaranthus viridis, Echinochloa crusgalli and Oxalis sp. recorded during 2018 were not found in the survey of 2008.


Chopra P, Angiras N.N. 2010. Effect of tillage and weed management on productivity and nutrient uptake of maize (Zea mays). Ind J Agron. 53: 66-69.
Curtis J.T, Mcintosh R.P. 1950. The interrelations of certain analytic and synthetic phytosociological characters. Ecology. 31: 434-455.
Curtis J.T. 1959. The Vegetation of Wisconsin. An ordination of plant communities. University of Wisconsin Press, Madison, Wisconsin, p 657.
Kumar A, Rana S.S., Kumar S. 2017. Management of diverse weed flora in maize under Kangra valley conditions of Himachal Pradesh. Ind J Weed Sci. 49: 236-240.
Kumar S, Rana S.S, Navell C, Angiras N.N. 2012. Management of hardy weeds in maize under mid-hill conditions of Himachal Pradesh. Ind J Weed Sci. 44: 11-17.
Orloff S, Dan P, Mick C, Lanini T. 2008. Avoiding Weed Shifts and Weed Resistance in Roundup Ready Alfalfa Systems. Oakland: University of    California Division of Agriculture and Natural Resources, Publication 8362.
Ramesh, Rana S.S, Kumar S. 2014. Weed dynamics and productivity of maize-wheat cropping system as influenced by tillage/planting techniques. Int J Sci Environ Technol. 3: 1059-1070.
Rana S.S, Sharma J.J, Manuja S. 1998. Evaluation of promising herbicide mixtures for weed control in maize (Zea mays L.). New Agriculturist. 9: 1-5.
Rana S.S, Kumar S, Kumar S, Sharma N, Manuja S.  2018a. Weed floristic diversity of the agro-ecosystems of Himachal Pradesh. ISWS International Golden Jublee Conference, Weeds and Society- Challenges and Opportunities, 21-24 November 2018, ICAR-DWR, Jabalpur, India. P-11.
Rana S.S, Badiyala D, Sharma N, Kumar S. 2018b. Evaluation of Tembotrione against Weeds in Maize (Zea mays L.) under mid Hill Conditions of Himachal Pradesh. Int J Innov Res Technol. 5: 220-226.
Shivani C, Rana M.C, Rana S.S. 2016. Effect of time and method of post-emergence atrazine application in controlling weeds in maize. Int J Adv Agric Sci Technol. 3: 49-59.
Singh V, Rana S.S Kharwara P.C. 1998. Studies on extent of adoption of latest agricultural technologies by the farmers of Himachal Pradesh and constraints thereof. International Symposium on Sustainable Agriculture in Hill Areas, Palampur, India. Oct, 29-31, Economic Viability of Hill Agriculture: Status and Opportunities, Sharma, H.R., Virender Kumar and A.C. Kapoor (Eds), Vol IV, pp 217-223.
Subbulakshmi S, Subbian P, Sarawanan N, Prabakaran. 2009. Weed shift in a maize ( Zea mays L.)  Sunflower ( Helianthus annuus L.) cropping system.  Acta Agronomica Hungarica. 57: 111-117.
Suresha K. 2014. Weeds dynamic studies in maize based cropping systems under mid hill        conditions of Himachal Pradesh. M.Sc. Thesis, Department of Agronomy, CSK HP              KrishiVishwavidyalaya, Palampur.
Tuesca D, Puricelli E, Papa J.C. 2001. A long term study of weed flora shifts in different tillage systems. Eur Weed Res Soci.41: 369-382.
Waheed U, Muhammad A.K, Muhammad S, Habib R, Anwar N, Muhammad A.S. 2008.  Impact of integrated weed management on weeds and yield of maize.  Pak. J. Weed Sci. Res. 14: 141-151.