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Failure to detect highly resistant strains in dicarboximide resistant field populations of Botrytis cinerea
Year:
1985
Source of publication :
EPPO Bulletin
Authors :
Katan, Talma
;
.
Volume :
15
Co-Authors:

KATAN, T., Department of Plant Pathology, ARO, The Volcani Centre, P. O. Box 6, Bet Dagan, 50 250, Israel

Facilitators :
From page:
371
To page:
377
(
Total pages:
7
)
Abstract:
Field isolates of Botrytis cinerea with moderate levels of resistance to dicarboximide fungicides (ED50 1.0–4.9 μg ml−1) and to dicloran were obtained from glasshouses where vinclozolin and iprodione failed to control grey mould. From sensitive and moderatcly‐resistant cultures, laboratory isolates were selected on dicarboximide‐amended medium, which were highly resistant to these fungicides (ED50 125‐>3000 μg ml−1). Conidia of all the resistant isolates germinated well on media amended with 100 μg ml−1 of the dicarboximides vinclozolin, iprodione, procymidone and myclozolin and with 5 μg ml−1 of metomeclan. However, the spores of the moderately resistant isolates did not germinate on 100 μg ml−1 metomeclan while the spores of the highly resistant isolates germinated well. Using media with 100 μg ml−1 of metomeclan to distinguish between the two phenotypes, no highly resistant strain was detected among 312 resistant samples from five cucumber glasshouses with a high frequency of moderately resistant strains. From air‐borne inoculum of five glasshouses with 100% resistant populations, 1604 colonies were recovered on vinclozolin‐amended (100 μg ml−1) medium and none on metomeclan‐amended (100 μg ml−1) medium. It is concluded that strains of B. cinerea highly resistant to dicarboximides are absent from field populations. Copyright © 1985, Wiley Blackwell. All rights reserved
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More details
DOI :
10.1111/j.1365-2338.1985.tb00243.x
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
31011
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:59
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Scientific Publication
Failure to detect highly resistant strains in dicarboximide resistant field populations of Botrytis cinerea
15

KATAN, T., Department of Plant Pathology, ARO, The Volcani Centre, P. O. Box 6, Bet Dagan, 50 250, Israel

Failure to detect highly resistant strains in dicarboximide resistant field populations of Botrytis cinerea
Field isolates of Botrytis cinerea with moderate levels of resistance to dicarboximide fungicides (ED50 1.0–4.9 μg ml−1) and to dicloran were obtained from glasshouses where vinclozolin and iprodione failed to control grey mould. From sensitive and moderatcly‐resistant cultures, laboratory isolates were selected on dicarboximide‐amended medium, which were highly resistant to these fungicides (ED50 125‐>3000 μg ml−1). Conidia of all the resistant isolates germinated well on media amended with 100 μg ml−1 of the dicarboximides vinclozolin, iprodione, procymidone and myclozolin and with 5 μg ml−1 of metomeclan. However, the spores of the moderately resistant isolates did not germinate on 100 μg ml−1 metomeclan while the spores of the highly resistant isolates germinated well. Using media with 100 μg ml−1 of metomeclan to distinguish between the two phenotypes, no highly resistant strain was detected among 312 resistant samples from five cucumber glasshouses with a high frequency of moderately resistant strains. From air‐borne inoculum of five glasshouses with 100% resistant populations, 1604 colonies were recovered on vinclozolin‐amended (100 μg ml−1) medium and none on metomeclan‐amended (100 μg ml−1) medium. It is concluded that strains of B. cinerea highly resistant to dicarboximides are absent from field populations. Copyright © 1985, Wiley Blackwell. All rights reserved
Scientific Publication
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