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Fungicide resistance among Cladobotryum spp. – causal agents of cobweb disease of the edible mushroom Agaricus bisporus

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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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Official URL: http://dx.doi.org/10.1017/S0953756299001197

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

Official Date:

March 2000

Dates:

Date	Event
March 2000	Published

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)

References:

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