Effect of different Doses and Time of Applications of Topramezone on Weed Dynamics, Growth and Yield of Chickpea (Cicer arietinum L.) in Bihar (India)
Sunil Kumar
Tirhut College of Agriculture, Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar-848125, India.
Gajanand *
Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar-848125, India.
Devilal Birla
Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar-848125, India and Anand Agricultural University, Anand, Gujarat-388110, India.
Mahendra Singh
Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar-848125, India.
Pradeep Kumar
Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar-848125, India and Navsari Agricultural University, Navsari, Gujarat-396450, India.
Amrendra Kumar
Tirhut College of Agriculture, Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar-848125, India.
Devendra Singh
Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar-848125, India.
*Author to whom correspondence should be addressed.
Abstract
Aims: To study the different levels of doses and time applications of topramezone on weed, growth and yield of chickpea (Cicer arietinum L.) in Bihar.
Place and Duration of Study: Agronomy research farm of Tirhut College of Agriculture, Dholi, Muzaffarpur (Bihar), during the rabi 2020-21.
Methodology: The experiment was carried out in an RBD design with three replications and ten treatments: topramezone (20.6 and 25.7 g/ha) applied at 14, 21, and 28 DAS, and quizalofop-p-ethyl (100 g/ha) applied at 25 DAS as post-emergence (PoE), pre-emergence (PE) application of valor 1000 g/ha + one hand weeding (HW) at 30 DAS, weed-free control (WFC), and weedy check.
Results: PE application of valor 1000 g/ha + one HW 30 DAS recorded maximum plant height, number of branches/plants, plant dry matter, seed and straw yield while registered lowest weed dry weight and WCE as compared to all other herbicide treatments. Among all PoE-treated treatments, spray of topramezone (25.7 g/ha) after 21 days of sowing recorded maximum of all these growth parameters at harvest and lowest weed dry matter and highest WCE as compared to other PoE applications.
Keywords: Topramezone, post-emergence, pre-emergence, quizalofop, chickpea, herbicide and pendimethalin