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Tolerance of Strawberries to Colletotrichum gloeosporioides f. sp. malvae, a Mycoherbicide for Control of Round-leaved Mallow (Malva pusilla)

Published online by Cambridge University Press:  12 June 2017

Knud Mortensen  and
Roberte M. D. Makowski
Knud Mortensen
Affiliation:
Agric. and Agri-Food Canada, Res. Stn., 5000 Wascana Parkway, Box 440, Regina, SK, Canada S4P 3A2
Roberte M. D. Makowski
Affiliation:
Agric. and Agri-Food Canada, Res. Stn., 5000 Wascana Parkway, Box 440, Regina, SK, Canada S4P 3A2
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Abstract

Tolerance of strawberry to Colletotrichum gloeosporioides f. sp. malvae, (C. g. malvae) a mycoherbicide for control of round-leaved mallow, was tested in the growth chamber and field in an area infested with round-leaved mallow. No visual infections of C. g. malvae were observed on inoculated strawberry plants in the growth chamber or field. However, C. g. malvae was reisolated from inoculated leaves and petioles from both situations, but no adverse effects were observed on strawberry plant development in the growth chamber or on berry yield in the field. Round-leaved mallow competition was detrimental to strawberry establishment, and berry yield was reduced by half compared to weed-free plots. In round-leaved mallow infested plots, treatment with C. g. malvae resulted in more vigorous strawberry plants, with berry production almost to the level of weed-free. Therefore, use of this mycoherbicide for control of round-leaved mallow in strawberries is a viable option that fits well in an integrated pest management system.

Keywords

Colletotrichum gloeosporioides (Penz.) Penz. and Sacc. f. sp. malvaeround-leaved mallow, Malva pusilla Sm. #3 MALPUstrawberry, (Fragaria L. spp.)Bioherbicidemicrobial herbicidelatent infectionweed competition
Type
Weed Management
Information
Weed Science , Volume 43 , Issue 3 , September 1995 , pp. 429 - 433
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

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