Economics of Various Herbicidal Treatments in Cabbage-Onion Relay Cropping System

摘要

Field investigations were conducted on chemical weed control in cabbage-onion relay cropping system during 1997-98 and 1998-99 cropping seasons. Higher spread of cabbage heads, average weight of cabbage heads, average weight of onion bulbs, bulb to top ratio in onion and average yield of cabbage and onion were recorded for herbicide oxyfiuorfen at 0.16 kg a.i./hectare and pendimethalin at 0.75 kg a.i./hectare. Average weight and average yield of onion bulbs were higher under metribuzin at 0.70 kg a.i./hectare, while metribuzin produced phytotoxic effect on cabbage crop reducing its yield and related parameters. Maximum net returns and net profit in cabbage-onion relay cropping was obtained under the influence of oxyfiuorfen at 0.16 kg a.i./hectare followed by Pendimethalin 0.75 kg a.i./hectare. Both of these treatments gave higher cabbage and onion yields which were comparable to weeded control. Oxyfiuorfen at 0.12 kg a.i./hectare and pendimethalin at 0.56 kg a.i./hectare increased cabbage yield and metribuzin at 0.70 kg a i./hectare increased onion yield which were statistically at par with both the best treatments. However, cabbage yield was reduced drastically under metribuzin treatments during both the years.