A field experiment was conducted during kharif seasons of 1998 and 1999 at Agricultural Research Station, Kumher, Bharatpur, Rajasthan to assess the efficacy of herbicides in different maize based intercropping systems. Repeated hand weeding proved most effective in reducing weed growth and in increasing crop production. Pre-planting application of fluchloralin at 0.75 kg ha−1 was at par with hand weeding. The maximum maize equivalent (4250 kg ha−1) was obtained due to fluchloralin with planting geometry of maize paired row+blackgram in 2: 2 ratio. Intercropping systems reduced the weed biomass. The lowest weed density was recorded in paired row planting in 2: 3 and 2: 2 (maize+blackgram) intercropping system. Maize paired row+blackgram in 2: 2 ratio in combination with fluchloralin at 0.75 kg ha−1 was found to be the most economical.
