Rahul Dhankar1, Sushil Kumar Singh1, Sharad Kumar Singh2,, Todarmal1, Preeti Dhanker, M.D. Parihar1 and Pradeep Kumar1
1Department of Agronomy, CCSHAU, Hisar
2Banda University of Agriculture and Technology, Banda
Email: sksiddhu.rajput@gmail.com
Received-27.05.2024, Revised-13.06.2024, Accepted-29.06.2024
Abstract: Groundnut, also known as peanut, is a leguminous plant belonging to the Fabaceae family. It is widely cultivated for its edible seeds, which are commonly consumed as snacks or used in cooking and food preparation around the world. The Cyperus rotundus, commonly known as purple nut sedge, is a challenging weed in many crops, including groundnut (Arachis hypogaea L.). It can significantly reduce crop yields due to its aggressive growth and ability to compete for resources. The use of pre- and post-emergence herbicides is a common strategy to manage this weed. Here’s an overview of how these herbicides affect Cyperus rotundus infestation in groundnut. Thecrop is highly susceptible to weed infestation because of its slow growth in the initial stages up to 45 DAS, short plant height, and underground pod-bearing habit. In contrast to other crops, weeds not only compete for vital resources during different stages of crop growth but also hinder pegging, pod development, and harvesting of groundnut. The present study entitled “Effect of pre and post-emergence herbicides on Cyperus rotundusinfestation in groundnut (Arachis hypogaea L.)” was conducted at Agronomy Research Farm, CCS Haryana Agricultural University,Hisar during Kharif 2020.The experiment comprising sixteen treatments was laid out in randomized block design with three replications. Treatments consisted of weed management viz., were imazethapyr + pendimethalin (RM) at 1000 g/ha, 1250 g/ha, 1500 g/ha and 1000 g/ha with one hoeing at 30 DAS, pendimethalin at 1000 g/ha and 1000 g/ha with one hoeing at 30 DAS, imazethapyr at 70g/ha and 70g/ha with one hoeing at 30 DAS, imazethapyr + imazamox (RM) at 70g/ha, imazethapyr + imazamox (RM) at 70g/ha pre-emergence with one hoeing at 30 DAS as pre-emergence application and imazethapyr + quizalofop 70+50 g/ha, imazethapyr + imazamox (RM) + quizalofop 70+50, Acifluorfen+clodinafop (RM) at 305g/ha as post-emergence and two hoeing compared with weed free and weedy checks. The results indicatedthat at 30 DAS, pre – emergence application of imazethapyr + imazamox @ 1000 g ha-1fb one hoeing at 30 DAS (T10) recorded significantly minimum density (1.33 m-2) of Cyperus rotundus as compared to other treatments and it was statistically at par with treatment T4, with application of imazethapyr + pendimethalin (RM) @ 1000 g ha-1fb one hoeing at 30 DAS (1.67 m-2). At 60 DAS lower density of Cyperus rotundus was found from treatment T14 (two hoeing at 25 and 45 DAS) and it was statistically at par with pre-emergence application of imazethapyr + pendimethalin (RM) @1000 g ha-1fb one hoeing (T4). At 90 DAS, treatment T4 in which imazethapyr + pendimethalin (RM) was applied as pre emergence @ 1000 g ha-1fb one hoeing recorded significantly the minimum population of Cyperus rotundus in comparison to other treatments. In this way different treatment presented variable results in the experiment as discussed further.
Keywords: Groundnut, Herbicides, Cyperus rotundus, Pod yield
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