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Host Range Alteration of the Bioherbicidal Fungus Alternaria crassa with Fruit Pectin and Bant Filtrates

Published online by Cambridge University Press:  12 June 2017

C. Douglas Boyette  and
Hamed K. Abbas
C. Douglas Boyette
Affiliation:
South. Weed Sci. Lab., U.S. Dep. Agric., Stoneville, MS 38776
Hamed K. Abbas
Affiliation:
South. Weed Sci. Lab., U.S. Dep. Agric., Stoneville, MS 38776
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Abstract

In greenhouse tests, the host specificity of Alternaria crassa (Sacc.) Rands, a mycoherbicide for jimsonweed was altered by the addition of water-soluble filtrates of jimsonweed and hemp sesbania or fruit pectin to fungal conidia suspensions. Several crop and weed species that were resistant to the fungus alone exhibited various degrees of susceptibility following these amendments, with 100% mortality occurring to the weeds hemp sesbania, showy crotalaria, and eastern black nightshade when treated with the fungus/pectin mixture. Nonhost plants that were inoculated with conidial mixtures amended with sucrose or cellulose were not affected. Modification of host specificity of this pathogen could have an influence on its bioherbiddal potential

Keywords

Jimsonweed, Datura stramonium L. # DATSThemp sesbania, Sesbania exaltala Rydb. ex A. W. Hill # SEBEXeastern black nightshade, Solanum ptycanthum Dun. # SOLPTshowy crotalaria, Crotalaria spectabilis Roth, # CVTSPBiological controlmycoherbicidehost selectivity alterationDATSTSEBEXSOLPTCVTSP
Type
Special Topics
Information
Weed Science , Volume 42 , Issue 3 , September 1994 , pp. 487 - 491
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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