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Effect of Light, Watering Frequency, and Chlorsulfuron on Canada Thistle (Cirsium arvense)

Published online by Cambridge University Press:  12 June 2017

Robert L. Zimdahl ,
Jingzhu Lin  and
Armando A. Dall'Armellina
Robert L. Zimdahl
Affiliation:
Dep. Plant Pathol. and Weed Sci., Colorado State Univ., Fort Collins, CO 80523
Jingzhu Lin
Affiliation:
Dep. Plant Pathol. and Weed Sci., Colorado State Univ., Fort Collins, CO 80523
Armando A. Dall'Armellina
Affiliation:
Dep. Plant Pathol. and Weed Sci., Colorado State Univ., Fort Collins, CO 80523
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Abstract

Greenhouse and field experiments were conducted to determine effects of light, water, and chlorsulfuron on growth of Canada thistle. In the greenhouse, shoot and root dry weight, leaf area, and number of inflorescences decreased as light and water levels decreased. In the field, shoot and root dry weight, leaf area, and number of Canada thistle inflorescences were positively correlated with light intensity from 1832 to 30 μmol m−2 s−1 photosynthetic photon flux density (PPFD). The greatest effect of light was on inflorescence production which was eliminated at 30 μmol m−2 s−1 (PPFD). The combined effect of water stress and chlorsulfuron decreased root and shoot growth but did not eliminate it.

Keywords

Chlorsulfuron, 2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]benzenesulfonamideCanada thistle, Cirsium arvense (L.) Scop. # CIRARPerennial weedCIRAR
Type
Weed Biology and Ecology
Information
Weed Science , Volume 39 , Issue 4 , December 1991 , pp. 590 - 594
Copyright
Copyright © 1992 by the Weed Science Society of America 

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References

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