Herbicidal management of the invasive joyweed Alternanthera bettzickiana

Herbicidal management of the invasive joyweed Alternanthera bettzickiana

Authors

  • Teresa Alex Kerala Agricultural University
  • Meera V Menon
  • Prameela P Kerala Agricultural University
  • Sindhu P. V. Kerala Agricultural University
  • Sreelakshmi K Kerala Agricultural University

Keywords:

Metsulfuron methyl chlorimuron ethyl, Oxyfluorfen, 2, 4-D, Pendimethalin, Weed control efficiency, Weed index

Abstract

Alternanthera bettzickiana is an invasive weed which has now attained the status of a major weed in severalupland crops in Kerala. Field experiments were conducted in 2021 and 2022 to study the efficacy of variouspre- emergence and post- emergence herbicides in controlling the weed in oriental pickling melon. Tentreatments included pre-emergence spray of oxyfluorfen and pendimethalin, post-emergence application of2,4-D and metsulfuron methyl+ chlorimuron ethyl, oxyfluorfen and pendimethalin followed by 2,4-D andmetsulfuron methyl+ chlorimuron ethyl, hand weeding at 20 and 40 DAS and unweeded control. Randomizedblock design was adopted and all the treatments were replicated thrice. Results indicated that dry matterproduction of A. bettzickiana, total weed dry matter production and nutrient uptake by weeds were significantlylower with pre-emergence application of oxyfluorfen followed by post-emergence application of 2,4-D ormetsulfuron methyl+ chlorimuron ethyl and were on par with hand weeding at 20 DAS and 40 DAS. Thesetreatments also resulted in higher crop growth, mean fruit weight and fruit yield. At 30 DAS, the sametreatments as well as pre- emergence oxyfluorfen resulted in higher weed control efficiency, while at 60DAS, only the combined pre- and post- emergence application of oxyfluorfen followed by 2,4-D ormetsulfuron methyl+ chlorimuron ethyl resulted in higher weed control efficiency. The combinations alsorecorded lower weed index and higher net return and B: C ratio.

Author Biographies

Teresa Alex, Kerala Agricultural University

PhD Scholar, Department of Agronomy, College of Agriculture, Vellanikkara, Kerala Agricultural University, Thrissur

Meera V Menon

Professor (Agronomy), AICRP(Weed Management), COH, Vellanikkara, P. O KAU, Thrissur 680656

Prameela P, Kerala Agricultural University

Professor and Head, Department of Agronomy,College of Agriculture, VellanikkaraKerala Agricultural University, Thrissur 

Sindhu P. V., Kerala Agricultural University

Assistant Professor (Agronomy), AICRP(MAP and B)College of Agriculture, VellanikkaraKerala Agricultural University, Thrissur 

Sreelakshmi K, Kerala Agricultural University

Assistant Professor (Agronomy)Krishi Vigyan Kendra, Palakkad

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Published

27-07-2024

How to Cite

Alex, T., Menon, M. V., P, P., P. V., S., & K, S. (2024). Herbicidal management of the invasive joyweed Alternanthera bettzickiana. Journal of Tropical Agriculture, 62(1), 51–58. Retrieved from https://jtropag.kau.in/index.php/ojs2/article/view/1345

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