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50
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2
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2018
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198
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Research note
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Purple nutsedge management by using herbicides alone and in combinations
R.K. Mathukia, B.K. Sagarka, D.M. Panara and B.S. Gohil
DOI :
http://dx.doi.org/10.5958/0974-8164.2018.00048.5
Email :
rkmathukia@jau.in
Address :
College of Agriculture, Junagadh Agricultural University, Junagadh, Gujarat 362 001
Keywords
Glyphosate
Herbicides
Nutsedge
Abstract
A field experiment was conducted during summer season of 2015-16 at Junagadh (Gujarat) to evaluate efficacy of a herbicides (halosulfuron-methyl, ethoxysulfuron, glyphosate) and their combinations (glyphosate + halosulfuron, glyphosate + ethoxysulfuron) in managing purple nutsedge (Cyperus rotundus L.) under non-crop situation. Maximum purple nutsedge control (92.20%) at 30 days after spraying (DAS) and the lowest regeneration (5.76%) at 60 DAS was recorded with tank-mix glyphosate 1230 g/ha + halosulfuron-methyl 33.75 g/ha at 30 days after emergence (DAE), which was at par with halosulfuron-methyl 80 g/ha at 30 DAE (91.50% and 7.76%, respectively) and halosulfuron-methyl 67.5 g/ha at 30 DAE (89.53% 8.48%, respectively). Ethoxysulfuron 15 g/ha at 30 DAE resulted in significantly the lowest nutsedge control (12.84%) at 30 DAS and the highest regeneration (62.22%) at 60 DAS. The herbicides and their mixtures applied for control of nutsedge during summer season have non-significant effect on plant height and dry matter/plant of succeeding crops, viz. groundnut, pearlmillet, cotton and sesame