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Anthracnose of Florida Beggarweed (Desmodium tortuosum) Caused by Colletotrichum truncatum

Published online by Cambridge University Press:  12 June 2017

John Gardina ,
Robert H. Littrell  and
Richard T. Hanlin
John Gardina
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Coastal Plain Exp. Stn., Tifton, GA 31793
Robert H. Littrell
Affiliation:
Dep. Plant Pathol., Univ. Georgia, Coastal Plain Exp. Stn., Tifton, GA 31793 and Athens, GA 30602
Richard T. Hanlin
Affiliation:
Dep. Plant Pathol., Univ. Georgia, Coastal Plain Exp. Stn., Tifton, GA 31793 and Athens, GA 30602
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Abstract

Greenhouse and growth chamber studies were conducted to determine conditions for infection of the fungal pathogen Colletotrichum truncatum (Schw.) Andrus and Moore on Florida beggarweed (Desmodium tortuosum (Sw.) DC. # DEDTO and to determine the host specificity of this fungus. Optimum conditions for disease development were 14 to 16 h incubation in 100% relative humidity (RH) at 24 to 29 C. Control of Florida beggarweed with 105 to 107C. truncatum spores/ml was greatest in the cotyledon stage and decreased with plant age. Ten of 18 Desmodium species tested were susceptible to the Florida beggarweed isolate of C. truncatum but 13 other plant species and varieties were resistant and 61 were immune.

Keywords

Biological controlhost rangeDEDTO
Type
Weed Biology and Ecology
Information
Weed Science , Volume 36 , Issue 3 , May 1988 , pp. 329 - 334
Copyright
Copyright © 1988 by the Weed Science Society of America 

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References

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