Effect of new herbicide pyrazosulfuron-ethyl on transplanted rice based cropping system in Cauvery Delta Zone of Tamil Nadu

Abstract

Rice (Oryza sativa L.) is an important food crop extensively grown in India. The average production and productivity are low in both India and Tamil Nadu. Several factors are responsible for reducing the yield of transplant rice. Among them, weed infestation is one of the major threats for low productivity of transplanted rice and subsequently on pulses yield. Therefore, field experiments were conducted at Tamil Nadu Rice Research Institute, Aduthurai during 2017-2018 in both kharif and rabi seasons with different doses of pyrazosulfuron-ethyl (20,30 and 42.85g ha-1) which compared with Pretilachlor dichloride 50% EC, Butachlor 50% EC, Hand weeding twice and untreated check. The results of the experiments revealed that application of Pyrazosulfuron ethyl 70% WDG @ 30 g ha-1 as post emergence controlled the weed menace in all stages of transplanted rice and also succeeding crop of blackgram in Cauvery Delta regions. Higher yield could be obtained under Pyrazosulfuron ethyl 70% WDG @ 30 g ha-1 as post emergence applied plot.