Indian Journal of Weed Science

Field experiments were carried out at Punjab Agricultural University Cotton Research Station, Muktsar during kharif 1984 and 1985. A seed cotton yield of 2140 kg/ha was obtained under hand weedings (2-hoeing) which was closely followed by alachlor 2.5 kg/ha + interculture (2112 kg/ha) and diuron 1.0 kg/ha (2105 kg/ha) which registered higher weed control efficiency in the order of 63.6, 60.2 and 60.3 per cent, respectively. Diuron 1.0 kg/ha and alachlor 2.5 kg/ha*+interculture proved more economical than two hoeings. Tank mix application of pen-dimethalin4-diuron though, proved superior to unweeded treatment with respect to weed control efficiency and increase in seed cotton yield but failed to equate with two hand weedings.