Biological Control of Blossom Blight of Alfalfa Caused by Botrytis cinerea Under Environmentally Controlled and Field Conditions

Plant Disease
G Q LiR S Erickson

Abstract

Fungal and bacterial antagonists were tested for their inhibition of sporulation of Botrytis cinerea on detached alfalfa florets. Clonostachys rosea, Gliocladium catenulatum, and Trichoderma atroviride were evaluated for protecting young blossoms and pods of alfalfa from infection by B. cinerea in vitro. C. rosea was further tested to control pod rot and seed rot caused by B. cinerea under field conditions. The results showed that four of the tested antagonists, C. rosea, G. catenulatum, T. atroviride, and Trichothecium roseum, could inhibit sporulation by B. cinerea on detached alfalfa florets. Both C. rosea and G. catenulatum were effective in suppression of infection of alfalfa pods by B. cinerea when inoculated on fresh petals of alfalfa at the anthesis stage, and their efficacy was greater than that of Trichoderma atroviride. A significant suppression of B. cinerea by C. rosea and G. catenulatum on pods and seed of alfalfa was observed when they were inoculated on senescent petals at the pod-development stage. Results of a field trial indicated that C. rosea applied to upper parts of alfalfa plants significantly suppressed pod rot and seed rot caused by B. cinerea, and significantly increased seed production of alfalfa in ...Continue Reading

References

Nov 10, 2001·Annual Review of Phytopathology·T C Paulitz, R R Bélanger
Mar 1, 2002·Cambridge Quarterly of Healthcare Ethics : CQ : the International Journal of Healthcare Ethics Committees·H Tristram Engelhardt
Apr 1, 1997·Plant Disease·John C SuttonR M Valdebenito-Sanhueza

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Citations

Feb 21, 2009·Archives of Microbiology·Graciele VicciniDavid Alexander Mitchell
Aug 5, 2005·Annual Review of Phytopathology·D R Fravel

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