Efficacy of herbicides against field dodder (Cuscuta campestris) in lentil, chickpea and linseed.
In a field experiment conducted during the winter seasons of 2002/03 and 2003/04, in Jabalpur, Madhya Pradesh, India, pre-emergence application of pendimethalin at 1000 g/ha and Squadron at 3000 g/ha (ready mixture of pendimethalin at 240 g a.i./litre + imazaquin at 40 g a.e./litre) significantly reduced the emergence of C. campestris compared with infested plot in both lentil and chickpea. Pre-plant incorporation of fluchloralin at 1000 g/ha was not effective against C. campestris. Post-emergence application of imazethapyr (50 and 100 g/ha) and glyphosate (50 g/ha) killed the extended vines of C. campestris and controlled its growth up to 25-30 days only. Maximum seed yield of lentil (4175 and 3407 kg/ha), chickpea (3615 and 2949 kg/ha) and linseed (1994 kg/ha) was recorded in weed-free plots. Pendimethalin at 1000 g/ha in all three crops, Squadron at 3000 g/ha in chickpea and glyphosate at 50 g/ha in linseed significantly increased seed yield. Squadron was phytotoxic to lentil and linseed, while imazethapyr and glyphosate (except at 50 g/ha in linseed) were phytotoxic to all crops.