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Control of Rush Skeletonweed (Chondrilla juncea) with Herbicides

Published online by Cambridge University Press:  12 June 2017

John W. Heap
John W. Heap*
Affiliation:
South Australian Dep. Agric., Northfield Laboratories, GPO Box 1671, Adelaide, South Australia 5001
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Abstract

A range of herbicide treatments was evaluated for long-term control of rush skeletonweed, a perennial weed of crops and pastures in North and South America, the Mediterranean region, central Europe, and Australia. Clopyralid (75 to 300 g ai/ha) and clopyralid mixtures with 2,4-D, MCPA, or dicamba were effective, resulting in survival rates of 0 to 4% for the most successful treatments applied for three consecutive seasons. Metsulfuron (9 g ai/ha) and 2,4-D (850 g ai/ha) significantly reduced survival when applied at high rates for three years. Barley yield in the season following control was increased by up to 195 to 199% of yield from untreated plots. Evidence was found for differences in herbicide susceptibility between narrowleaf and broadleaf forms of rush skeletonweed.

Keywords

Clopyralid, 3,6-dichloro-2-pyridinecarboxylic aciddicamba, 3,6-dichloro-2-methoxybenzoic acidMCPA, (4-chloro-2-methylphenoxy)acetic acidmetsulfuron, 2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]-amino]sulfonyl]benzoic acid2,4-D, (2,4-dichlorophenoxy)acetic acidrush skeletonweed, Chondrilla juncea L. # CHOJUbarley, Hordeum vulgare L.Perennial weedlong-term controlyield increasepicloram. CHOJU
Type
Research
Information
Weed Technology , Volume 7 , Issue 4 , December 1993 , pp. 954 - 959
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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