Ecology, Environment and Conservation Paper

INTEGRATED WEED MANAGEMENT PRACTICES AND THEIR EFFECT ON YIELD AND ECONOMICS OF ONION

B. Ramachandraiah, N. Hariprasad Rao and M. Madavi

Abstract

A field experiment was conducted during rabi 2010 at Model orchard, College of Horticulture, Rajendranagar, Hyderabad to find out the effectiveness of integrated weed control on yield and economics of onion. The experiment was laid in RBD with 3 replications and 13 treatments with pre emergence herbicides (PE) Pendimethalin, Oxyfluorfen, Oxadiargyl and a post emergence herbicide (POE) Quizalofop ethyl and cultural practices with hand weeding and their combinations. The results indicated that the pre-emergence application of oxadiargyl @ 90 g a.i ha-1 (PE) + quizalofop ethyl 75 g a.i ha-1 (POE) recorded highest yield (27.96 t ha-1), profitability, weed control efficiency (82.87per cent) and B:C ratio (2.61), which was at par with treatment pendimethalin C.S @ 0.75 g a.i ha-1 (PE) + quizalofop ethyl 75 g a.i ha-1 (POE).