Himachal Journal of Agricultural Research

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Bio-Efficacy and Phytotoxicity of Glyphosate 41% SL on Weed Flora of Tea and its Effect on Soil Microbial Activities


Affiliations
1 Department of Agronomy, College of Agriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, India
 

A field experiment was conducted at the farmers’ field in Panchrukhi block of Kangra District (H.P.) during kharif 2019 to evaluate the bio-efficacy and phytotoxicity of glyphosate 41% SL in tea (Camellia sinensis). The experiment was laid out in a Randomized Block Design with ten treatments and was replicated thrice. The treatments comprised of six doses of a new formulation of glyphosate 41 % SL (All Clear, Anu Products Ltd.) 1.0, 2.0, 3.0, 4.0, 5.0 and 8.0 litre / ha, glyphosate 41 % SL (Roundup, Monsanto), glyphosate 71 % SG 3.0 kg / ha and weedy and weed free checks. Major weeds that were found to infest the experimental tea orchard included Erigeron canadensis, Ageratum conyzoides, Cynodon dactylon, Imperata cylindrica, Paspalum conjugatum and Polygonum alatum. The results revealed that in tea crop weeds can be effectively controlled with the application of glyphosate 41% SL (All Clear) 3.0 litre/ha and 4.0 litre/ha. No phytotoxicity symptoms on tea were observed at any of dose of herbicide.

Keywords

Bio-Efficacy, Glyphosate, Tea, All Clear, Weeds.
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  • Bose A, Kumar R and Roy SB 2007. Integrated weed management to control Heridium spp and Polygonum chinensis in young tea plantations of India. In: Proc. 21st Asian Pacific Weed Science Society Conference, pp 565-567, Colombo, Sri Lanka.

  • Devi NM., Kundu CK., Bera PS., Panda S and Das S. 2019. Evaluation of glyphosate 41% SL to control weeds in tea at Terai region of West Bengal. Journal of Crop and Weed 15: 213-219.

  • Ilango RVJ, Durairaj J and Mohan KP 2010. Evaluation of Excel-mera 71 for control of Commelina species. Newsletter-UPASI Tea Research Foundation 20:20-25.

  • Kumar A and Ghosh RK 2015.Bio efficacy of glyphosate for management of weeds in tea. In: 25th Asian Pacific Weed Science Society Conference on Weed Science for Sustainable Agriculture, Environment and Biodiversity, pp377, Hyderabad , India

  • Mani VS, Malla ML, Gautam KC and Bhagwndas. 1973. Weed killing chemicals inpotato cultivation. Indian Farming 22:17-18.

  • Opeke KL. 2005.Tropical commodity tree crops. 2nd Ed., Spectrum House, Ibadan, Nigeria, pp 436-440.

  • Wollum AG 1983. Cultural methods for soil microorganisms. In: Methods of Soil Analysis (Part 2 Chemical and microbiological properties), ed Page AL. American Society of Agronomy, Inc. and Soil Science Society of America, Inc. pp 781-802 (DOI:10.2134/agronmonogr 9.2.2ed).


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  • Bio-Efficacy and Phytotoxicity of Glyphosate 41% SL on Weed Flora of Tea and its Effect on Soil Microbial Activities

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Authors

Suresh Kumar
Department of Agronomy, College of Agriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, India
Neelam Sharma
Department of Agronomy, College of Agriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, India
Sandeep Manuja
Department of Agronomy, College of Agriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, India
Parita
Department of Agronomy, College of Agriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, India
Tamanna Bhalla
Department of Agronomy, College of Agriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, India

Abstract


A field experiment was conducted at the farmers’ field in Panchrukhi block of Kangra District (H.P.) during kharif 2019 to evaluate the bio-efficacy and phytotoxicity of glyphosate 41% SL in tea (Camellia sinensis). The experiment was laid out in a Randomized Block Design with ten treatments and was replicated thrice. The treatments comprised of six doses of a new formulation of glyphosate 41 % SL (All Clear, Anu Products Ltd.) 1.0, 2.0, 3.0, 4.0, 5.0 and 8.0 litre / ha, glyphosate 41 % SL (Roundup, Monsanto), glyphosate 71 % SG 3.0 kg / ha and weedy and weed free checks. Major weeds that were found to infest the experimental tea orchard included Erigeron canadensis, Ageratum conyzoides, Cynodon dactylon, Imperata cylindrica, Paspalum conjugatum and Polygonum alatum. The results revealed that in tea crop weeds can be effectively controlled with the application of glyphosate 41% SL (All Clear) 3.0 litre/ha and 4.0 litre/ha. No phytotoxicity symptoms on tea were observed at any of dose of herbicide.

Keywords


Bio-Efficacy, Glyphosate, Tea, All Clear, Weeds.

References