and Manjeet 1&2. Assistant Scientist (Agronomy), 3. Ex-Professor and Head, 4 STA, Department of Agronomy, CCS Haryana Agricultural University, Hisar (Haryana) Corresponding author e-mail : Paper Received on July 14, 2021, Accepted on September 24, 2021 and Published Online on October 01, 2021 ABSTRACT The present weed survey was carried out in south-western Haryana during kharif seasons of 2018 and 2019 in rice, cotton and Cluster bean revealed that 18, 20 and 27 weed species were infested the rice, cotton and Cluster bean, respectively. In rice, Echinochloa glabrescence and Leptochloa chinensis were the most dominant weed with IVI value of 67.6 and 37.6 per cent. Cyperus. difformis (19.7%) and Scirpus tuberosus (13.8%) were the dominant sedges infested the rice crop. E. colona was second most important weed in Sirsa with IVI value of 38.9 per cent, while in Fatehabad Leptochloa chinensis was second most important weed with IVI value of 34.4 per cent following E. glabrescence. Dactyloctenium aegyptium was the most dominant weeds of cotton and Cluster bean with highest IVI value of 48.3 per cent (in cotton) during 2019 and 55.0 per cent and 38.2 per cent in Cluster bean during 2018 and 2019, respectively. Digera arvensis, T. portulacastrum, Corchorus spp. were dominant broad-leaved weeds in cotton with relative density (14.8, 2.0 and 0.7%) and IVI (28.8, 3.8 and 5.9%) respectively. Mollugo verticillatsa, Corchorus tridens and Digera arvensis were major broadleaf weeds of Cluster bean. In Cluster bean, D. arvensis was present in all the surveyed districts whereas, Mollugo spp. was dominant in the Bhiwani and Charkhi Dadri districts of Haryana. Key words:

Keyword: Cotton; Cluster bean; Dactyloctenium aegyptium, IVI; Rice; Survey; Weeds;