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Interaction Between a Velvetleaf Isolate of Colletotrichum coccodes and Thidiazuron for Velvetleaf (Abutilon theophrasti) Control in the Field

Published online by Cambridge University Press:  12 June 2017

L. A. Wymore  and
A. K. Watson
L. A. Wymore
Affiliation:
Macdonald Coll. of McGill Univ., Ste-Anne-de-Bellevue, Québec H9X 1C0
A. K. Watson
Affiliation:
Macdonald Coll. of McGill Univ., Ste-Anne-de-Bellevue, Québec H9X 1C0
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Abstract

Spraying with tank mix combinations of the fungus Colletotrichum coccodes and the plant growth regulator thidiazuron increased mortality, decreased biomass and height of velvetleaf, and increased soybean yield in field experiments. The velvetleaf isolate of C. coccodes was compatible with thidiazuron, and tank mix combinations consistently improved control over either component alone. In the moist 1986 season the fungus and the growth regulator interacted synergistically to increase velvetleaf mortality. In the drier 1987 season no significant interaction was detected between the two components.

Keywords

Thidiazuron, N-phenyl-N′-1,2,3-thidiazol-5-yl-ureaColletotrichum coccodes (Wallr.) Hughesvelvetleaf, Abutilon theophrasti Medik. ♯3 ABUTHsoybeans, Glycine max (L.) Merr.Biological weed controlbioherbicidesynergismABUTH
Type
Special Topics
Information
Weed Science , Volume 37 , Issue 3 , May 1989 , pp. 478 - 483
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

Literature Cited

1. Drury, R. E. 1980. Physhiological interaction, its mathematical expression. Weed Sci. 28:573–579.CrossRefGoogle Scholar
2. Gotlieb, A. R., Watson, A. K., and Poirier, C. 1986. First report of an isolate of Colletotrichum coccodes which results in severe anthracnose of velvetleaf. Plant Dis. 71:281.CrossRefGoogle Scholar
3. Hodgson, R. H. and Snyder, R. H. 1988. Thidiazuron effects on Malvaceae, corn, Zea mays; and soybean, Glycine max . Weed Tech. 2:342–349.CrossRefGoogle Scholar
4. Hodgson, R. H., Wymore, L. A., Watson, A. K., Snyder, R. H., and Collette, A. 1988. Efficacy of Colletotrichm coccodes and thidiazuron for velvetleaf (Abutilon theophrasti) control in soybean (Glycine max). Weed Tech. 2:473–480.CrossRefGoogle Scholar
5. Poirier, C. 1984. The etiology and host-range of Colletotrichum coccodes, a possible biological control agent of velvetleaf (Abutilon theophrasti). M.S. Thesis. Macdonald Coll. of McGill Univ., Ste.-Anne-de-Bellevue, Quebec, H9X 1C0. 240 pp.Google Scholar
6. Walker, H. L. 1980. Alternaria macrospora as a potential biocontrol agent for spurred anoda. Production of spores for field studies. U.S. Sci. Educ. Admin. Adv. Agric. Tech., Southern Ser., No. 12. 5 pp.Google Scholar
7. Wymore, L. A., Poirier, C., Watson, A. K., and Gotlieb, A. R. 1988. Colletotrichum coccodes, a potential bioherbicide for control of velvetleaf (Abutilon theophrasti). Plant Dis. 72:534–538.CrossRefGoogle Scholar
8. Wymore, L. A., Watson, A. K., and Gotlieb, A. R. 1987. Interaction between Colletotrichum coccodes and thidiazuron for control of velvetleaf (Abutilon theophrasti). Weed Sci. 35:377–383.CrossRefGoogle Scholar