Himachal Journal of Agricultural Research

Pooja ¹, Suresh Kumar ¹, Neelam Sharma ¹, Sandeep Manuja ¹, Tamanna Bhalla ¹

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

Abstract

A field experiment was conducted during kharif 2019 at the Research Farm of Department of Agronomy, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur, to study the efficacy of new herbicide combination product GOD H007 (containing glyphosate 40% and pyrithiobac sodium 3%) for managing weeds in grasslands. The experiment was laid out in Randomised Block Design with three replications, and consisted of seven weed control treatments viz., GOD H007 at 860, 882 and 903 g/ha, pyrithiobac sodium 62.5 g/ha, glyphosate 820 g/ha, hand weeding and a weedy check. Application of this new herbicide combination product GOD H007 903 g/ha though remaining statistically alike with glyphosate 820 g/ha, resulted in significantly lowest total weed density and total weed dry matter at all the stages of observation except that at 30 days after spray (DAS) at which hand weeding proved to be a superior treatment. These three treatments also recorded higher weed control efficiency. However, significantly highest fresh and dry herbage yield at 60 DAS was recorded with the application of pyrithiobac sodium 62.5 g/ha. Application of this new herbicide GOD H007 903 g/ha showed promise to be effective for managing weeds in grassland.

Keywords

GOD H007,, Weed Control, Grass Land, Glyphosate, Pyrithiobac Sodium.

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Suresh Kumar ¹, Neelam Sharma ¹, Sandeep Manuja ¹, Parita ¹, Tamanna Bhalla ¹

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

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.

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Tamanna Bhalla ¹, Suresh Kumar ¹, S.S. Rana ¹

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

Abstract

An open pot experiment was conducted during Kharif 2020 and 2021 at Research Farm of Department of Agronomy, College of Agriculture CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur, H.P. to evaluate herbicides for the control of Alternanthera philoxeroides. The experiment was laid out in completely randomized design with three replications and consisted of ten herbicide treatments viz. glyphosate 1000 g/ha, paraquat 1000 g/ha, 2,4-D Na salt 1250 g/ha, 2,4-D ethyl ester 1000 g/ha, metsulfuron methyl 4 g/ha, carfentrazone 25 g/ha, glufosinate ammonium 500 g/ha, bispyribac Na 20 g/ha, flumioxazin 200 g/ha, diuron 500 g/ha and one weedy check (control). All the herbicide treatments resulted in significantly better control of Alternanthera compared to control (weedy check). Glyphosate 1000 g/ha remaining at par with metsulfuron methyl 4 g/ha provided lowest shoot count at all stages of observation during both years. This was followed by application of 2,4 D ethyl ester 1000 g/ha and carfentrazone 25 g/ha which except for initial stage of observation gave results statistically similar to glyphosate 1000 g/ha and metsulfuron methyl 4 g/ha from 25 to 55 days after 2 spray. The lowest weed dry matter (g/m ) and therefore highest weed control efficiency was recorded with application of glyphosate 1000 g/ha, metsulfuron methyl 4 g/ha and 2,4 D ethyl ester 1000 g/ha at 55 days after spray.

Keywords

Alligator weed, herbicides, pot studies.

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