Clarkson, John P., Payne, Tina, Mead, A. (Andrew) and Whipps, J. M. (2002) Selection of fungal biological control agents of Sclerotium cepivorum for control of white rot by sclerotial degradation in a UK soil. Plant Pathology, 51 (6). pp. 735-745. doi:10.1046/j.1365-3059.2002.00787.x

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Abstract

A range of fungal isolates was tested in a three-stage screening system for their ability to degrade sclerotia of Sclerotium cepivorum on agar and in soil, and to reduce white rot disease on onion seedlings. Biological control agents (BCAs) were identified that could degrade up to 60% of sclerotia in soil and significantly reduce white rot disease on onion seedlings. The efficacy of the BCAs was enhanced when applied as wheat bran cultures compared with spore suspensions, and two of the best BCAs from the screening procedures were both identified as Trichoderma viride (L4, S17A). When L4 and S17A were fluid-drilled in guar gum with bulb onion seed in the field white rot symptoms were significantly reduced, but stem base applications applied mid-season had little effect. The strategy of selecting and using BCAs that degrade sclerotia of S. cepivorum and integration with other control methods is discussed.

Item Type:	Journal Article
Subjects:	S Agriculture > SB Plant culture
Divisions:	Faculty of Science > Life Sciences (2010- )
Library of Congress Subject Headings (LCSH):	White rot (Onions) , Sclerotium (Mycelium) -- Biological control
Journal or Publication Title:	Plant Pathology
Publisher:	Wiley-Blackwell Publishing Ltd.
ISSN:	0032-0862
Official Date:	December 2002
Dates:	Date Event December 2002 Published
Volume:	51
Number:	6
Page Range:	pp. 735-745
DOI:	10.1046/j.1365-3059.2002.00787.x
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access

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