Grogan, Helen M. and Gaze, R. H.. (2000) Fungicide resistance among Cladobotryum spp. – causal agents of cobweb disease of the edible mushroom Agaricus bisporus. Mycological Research, Vol.10 (No.3). 357-364 . ISSN 0953-7562

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Abstract

A survey of fungicide resistance among isolates of the mushroom pathogens Cladobotryum mycophilum and C. dendroides Types I and II was undertaken, with respect to the active ingredients thiabendazole, carbendazim (benzimidazoles) and prochloraz manganese following an epidemic in Britain and Ireland in 1994/95. The majority of isolates (41/57) were strongly resistant to thiabendazole (ED50 > 200 ppm) and were exclusively C. dendroides Type II. All C. mycophilum and C. dendroides Type I isolates, and four C. dendroides Type II isolates, were weakly resistant to thiabendazole (ED50 1–10 ppm). Thiabendazole-resistant C. dendroides Type II isolates were only weakly resistant to carbendazim (ED50 2–10 ppm) and isolates which were weakly resistant to thiabendazole were carbendazim-sensitive (ED50 < 1 ppm), demonstrating a lack of complete cross resistance between these two benzimidazole fungicides. The ED50 values for all isolates with respect to prochloraz manganese ranged from 0.14 to 7.8 ppm. Benzimidazole resistance was considered to have been an important factor influencing the severity of the 1994/95 cobweb epidemic but 25% of isolates collected were benzimidazole sensitive.

Item Type:	Journal Article
Subjects:	S Agriculture > SB Plant culture
Divisions:	Faculty of Science > Life Sciences (2010- ) > Warwick HRI (2004-2010)
Library of Congress Subject Headings (LCSH):	Cultivated mushroom -- Diseases and pests, Mycoparasitism, Fungicide resistance, Benzimidazoles
Journal or Publication Title:	Mycological Research
Publisher:	Cambridge University Press
ISSN:	0953-7562
Date:	March 2000
Volume:	Vol.10
Number:	No.3
Page Range:	357-364
Identification Number:	10.1017/S0953756299001197
Status:	Peer Reviewed
Access rights to Published version:	Open Access
Funder:	Horticultural Development Council (Great Britain) (HDC)
Grant number:	Project M14a (HDC)
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URI:	http://wrap.warwick.ac.uk/id/eprint/831

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