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Efficacy of Phomopsis convolvulus for Control of Field Bindweed (Convolvulus arvensis)

Published online by Cambridge University Press:  12 June 2017

Louise Morin ,
Alan K. Watson  and
Richard D. Reeleder
Louise Morin
Affiliation:
Macdonald Coll. of McGill Univ., Ste-Anne-de-Bellevue, Quebec, H9X 1C0
Alan K. Watson
Affiliation:
Macdonald Coll. of McGill Univ., Ste-Anne-de-Bellevue, Quebec, H9X 1C0
Richard D. Reeleder
Affiliation:
Macdonald Coll. of McGill Univ., Ste-Anne-de-Bellevue, Quebec, H9X 1C0
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Abstract

Phomopsis convolvulus Ormeno, a fungus, reduced growth and regeneration of field bindweed under greenhouse environments. Field bindweed seedlings at the cotyledon stage were severely injured and killed (95% mortality) with 108 conidia/m2. Three- to five-leaf seedlings (2 weeks old) were controlled when inoculated with 109 conidia/m2 (70% mortality; 98 and 89% reduction in dry weight of aboveground biomass and roots, respectively). This inoculum density reduced aboveground and root biomass, and adversely affected regeneration of 4-week-old seedlings and established plants, but few plants were killed. In controlled-environment studies, two inoculations were superior (P = 0.02) to one inoculation in reducing foliage aboveground of well-established seedlings (4 weeks old). However, new shoots produced between the first and second inoculation treatments were less diseased than expected.

Keywords

Field bindweedConvolvulus arvensis L. ♯3 CONARBiological weed controlbioherbicideCONARmycoherbicide
Type
Special Topics
Information
Weed Science , Volume 37 , Issue 6 , November 1989 , pp. 830 - 835
Copyright
Copyright © 1989 by the Weed Science Society of America 

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