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Evaluation of sulfonyl urea herbicides for management of littleseed canarygrass (Phalaris minor Retz.)

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Title Evaluation of sulfonyl urea herbicides for management of littleseed canarygrass (Phalaris minor Retz.)
 
Creator Neha Rani
 
Contributor Dhawan, Rupa
 
Subject Antioxidant enzymes, Lon efflux, Lipid peroxidation, Littleseed canary grass, Pendimethalin, Photosynthetic pigments, Sulfonylurea herbicides.
 
Description Phalaris minor constitutes a major weed of wheat fields under Rice-Wheat rotation
system in Haryana. It evolved insensitivity to urea herbicide isoproturon after its continuous
use for 10-15 years. Herbicides with different mode of action like fenoxaprop, clodinafop
(ACCase inhibitors) and sulfosulfuron (ALS inhibitors) were recommended for its management
in 1998. In this investigation impact of sulfosulfuron and its ready mix formulation ‘Total’ i.e.
sulfosulfurom + metsulfuron and ‘Atlantis’ i.e. mesosulfuron + iodosulfuron was studied on
P.minor populations. It was observed that sulfosulfuron as well as its ready mix formulation of
sulfosulfurom + metsulfuron (Total) and mesosulfuron + iodosulfuron (Atlantis) proved
ineffective for its management after 10-12 years of its use. GR50 values for the populations
tested were in the range of 30-110 g ha-1 in contrast to 5 g ha-1 at the time of recommendation.
Physiological parameters like photosynthetic pigments (chlorophyll and carotenoid) were
unaffected in the resistant populations as compared to medium resistant populations. Leaf cells
showed increase in permeability and lipid peroxidation after spray with mesosulfuron +
iodosulfuron in all biotypes, leakage was again more in medium resistant biotypes. Proline
content increased more in medium resistant biotypes as compared to resistant one. Antioxidant
enzymes like catalase, peroxidase and superoxidase dismutase showed increased activity in the
resistant biotypes required to scavenge its reactive oxygen species produced as a result of
herbicide spray. Pendimethalin was found to suppress all the P.minor biotypes tested and
showed a promise for management of the P.minor biotypes resistant to sulfonylurea herbicides.
 
Date 2016-09-05T14:12:38Z
2016-09-05T14:12:38Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/75465
 
Language en
 
Format application/pdf
 
Publisher CCSHAU