Legume Research - An International Journal

A field experiment was conducted during the post rainy (rabi) seasons of 2012–13 and 2013–14 at Agricultural Research Station, Gulbarga (Karnataka) to evaluate the time and dosage of imazethapyr in chickpea. The experiment was laid out with 12 weed-control treatments, viz. imazethapyr at 3 application rates (15, 20 and 30 g/ha) sprayed at 10 and 20 and 30 days after germination (DAG), pendimethalin 0.75 kg/ha + one hand weeding at 25–30 DAS, weed free check and weedy check. Among the treatments, weed free check recorded significantly higher seed yield (1287 kg/ha), net returns (Rs. 29080/ha) and B: C ratio (2.30) and minimum weed dry weight and higher WCE (100%) followed by pre emergence application of pendimethalin 0.75 kg/ha + one hand weeding at 25–30 DAS. Among the different doses and time of application of imazethapyr, application of imazethapyr 30 g/ha at 10 DAG resulted in 57.9% higher grain yield (1098 kg/ha), lower weed dry matter (6.88 g/0.5 m²) and higher WCE (75.33%) over unweeded control and other treatments. Imazethapyr 30 g/ha at 10 DAS also recorded the highest net returns (Rs.22780/ha) and B: C ratio (2.08), which was closely followed by imazethapyr 20 g/ha sprayed at 10 DAG 20 DAG and imazethapyr 30 g/ha at 30 DAG.