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Weeds resistant to chlorsulfuron and atrazine from the north-east grain region of Australia


Adkins, SW and Wills, D and Boersma, M and Walker, SR and Robinson, G and McLeod, RJ and Einam, JP, Weeds resistant to chlorsulfuron and atrazine from the north-east grain region of Australia, Weed Research, 37, (5) pp. 343-349. ISSN 0043-1737 (1997) [Refereed Article]

Copyright Statement

Copyright 1997 European Weed Research Society

DOI: doi:10.1046/j.1365-3180.1997.d01-56.x


The resistance of weeds to triazine and sulfonylurea herbicides has been recorded in several countries. The extent of the problem in the north-east grain region of Australia is uncertain. In an initial study, resistance to chlorsulfuron and atrazine in 15 weed species was investigated. The study showed that at least six of them have evolved resistance to one or other of these herbicides. Two collections of Rapistvum rugosum L., three of Sisymbrium orientale L., five of Sonchus oleraceus L., one of Fallopia convolvulus (L.) A. Love and one of Sisymbrium rhellungii O. Schultz were resistant to the recommended rate of chlorsulfuron (15 g a.i. ha-1). Resistance to chlorsulfuron was not discovered in three collections of Sisymbrium L., two of Brassica tournefortii Gouan. three of Emex australis Steinh. and 11 of Phalaris paradoxa L. Two collections of Urochtoa panicoides Beauv. were resistant, and three collections possibly resistant, to the recommended rate of atrazine(1.8 kg a.i. ha-1). Resistance to atrazine was not found in 12 collections of Hibiscus urionum L., nine of Salvia reflexa L., two of Parthenium hysterophorus L., two of Amaranthus viridis L. and 14 of Echinochloa colona (L) Link. The resistance status of four weeds (R. rugosum. F. convolvulus, S. thellungii and U. panicoides was confirmed using a multiple dose-response screen and is the first report of resistance for these species. Herbicide usage records show that resistance has developed after 3-10 years of selection with chlorsulfuron and 2-15 years of selection with atrazine, with no correlation between the frequency of use and the degree of resistance for any of the species where eight or more collections were made.

Item Details

Item Type:Refereed Article
Keywords:herbicide resistance, chlorsulfuron, atrazine, wheat, grain
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Crop and pasture production
Research Field:Crop and pasture protection (incl. pests, diseases and weeds)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Grains and seeds
Objective Field:Wheat
UTAS Author:Boersma, M (Dr Mark Boersma)
ID Code:90611
Year Published:1997
Web of Science® Times Cited:46
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2014-04-14
Last Modified:2014-05-12

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