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Damage to Common Ragweed (Ambrosia artemisiifolia) Caused by the White Rust Fungus (Albugo tragopogi)

Published online by Cambridge University Press:  12 June 2017

H. Hartmann  and
A. K. Watson
H. Hartmann
Affiliation:
Dep. Plant Sci., Macdonald Campus of McGill Univ., Ste-Anne-de-Bellevue, Que., Canada H9X 1CO
A. K. Watson
Affiliation:
Dep. Plant Sci., Macdonald Campus of McGill Univ., Ste-Anne-de-Bellevue, Que., Canada H9X 1CO
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Abstract

The plant pathogenic fungus Albugo tragopogi (Pers.) S. F. Gray (“white rust”), isolated from a local population of common ragweed (Ambrosia artemisiifolia L.) and inoculated into ragweed seedlings at the two-leaf stage, reduced pollen production by 99%, seed production by 98%, and top weight by 79% of plants that developed systemic disease symptoms while growing in a controlled environment. However, only 14% of the inoculated plants developed systemic symptoms. A convenient method of inoculating leaves of seedling plants with zoospores of a fungus is described.

Keywords

Pathogenpollen productionsystemic infection
Type
Research Article
Information
Weed Science , Volume 28 , Issue 6 , November 1980 , pp. 632 - 635
Copyright
Copyright © Weed Science Society of America 

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References

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