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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Resistance to polyoxin AL and other fungicides in Botrytis cinerea collected from sweet basil crops in Israel
Year:
2013
Authors :
אלעד, יגאל
;
.
מאמייב, מוחידין
;
.
קורולב, נדיה
;
.
Volume :
137
Co-Authors:
Mamiev, M., Department of Plant Pathology and Weed Research, ARO, The Volcani Center, Bet Dagan, 50250, Israel
Korolev, N., Department of Plant Pathology and Weed Research, ARO, The Volcani Center, Bet Dagan, 50250, Israel
Elad, Y., Department of Plant Pathology and Weed Research, ARO, The Volcani Center, Bet Dagan, 50250, Israel
Facilitators :
From page:
79
To page:
91
(
Total pages:
13
)
Abstract:
A total of 568 B. cinerea isolates were collected from diseased sweet basil plants and the air in 10 sweet basil greenhouses. Mycelial growth tests were used to evaluate the sensitivity of these isolates to benomyl, fenhexamid, iprodione, polyoxin AL and pyrimethanil. EC50 values for polyoxin, the main botryticide on sweet basil in Israel, ranged from 0.4 to 6.5 μg ml-1 and had a bimodal distribution; the EC50 values for sensitive isolates ranged from 0.4 to 1.5 μg ml-1 and the EC50 values for low-level resistant isolates ranged from 4 to 6.5 μg ml-1. Among populations that had not been exposed to polyoxin treatments, 20 to 35 % of the collected isolates were low-level resistant for polyoxin. Polyoxin treatments in an experimental greenhouse shifted the equilibrium in favour of low-level resistant isolates, and the change occurred rapidly: from a frequency of 20 % low-level resistant isolates in the population that had never been treated with polyoxin to a frequency of 72 % after a few treatments over two seasons. Prolonged use of polyoxin in Israeli basil crops (in some sites for more than 10 years) does not appear to have led to the development of high-level resistance, but low-level resistant isolates were found in commercial greenhouses with the frequency of up to 73 %. High-level resistance to benzimidazoles was common (60 to 80 % of isolates) in greenhouses with a history of benzimidazole treatments; whereas 15-25 % of the isolates from greenhouses in which fungicides were not used were resistant. Low-level resistance to dicarboximides was fairly widespread (frequency of 30 to 80 % depending on the greenhouse) and a few cases of moderate resistance to dicarboximides were also noted (frequency of 0 to 9 %). Neither high- nor low-level resistance to anilinopyrimidines was common in sweet basil commercial greenhouses (0 to 7 %). However, 34 % of the isolates were strongly resistant in the experimental greenhouse, following a few treatments with anilinopyrimidine fungicides during the previous season. Before those treatments, the proportion of anilinopyrimidines resistant isolates had been 1 %. About 3 % of the isolates exhibited low-level resistance to fenhexamid and no isolates were found to be strongly resistant to fenhexamid. Low-level resistance to one fungicide was often associated with low-level resistances to other fungicides. Thirty-two phenotypes exhibiting resistance to one or more of the tested fungicides were noted among B. cinerea isolates. Resistant isolates showed similar or reduced fitness parameters in comparison to wild-type isolates. © 2013 KNPV.
Note:
Related Files :
benomyl
Fenhexamid
fitness
fungicide
Iprodione
Israel
Ocimum basilicum
pesticide resistance
Polyoxin
Pyrimethanil
עוד תגיות
תוכן קשור
More details
DOI :
10.1007/s10658-013-0218-3
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
18974
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:25
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Scientific Publication
Resistance to polyoxin AL and other fungicides in Botrytis cinerea collected from sweet basil crops in Israel
137
Mamiev, M., Department of Plant Pathology and Weed Research, ARO, The Volcani Center, Bet Dagan, 50250, Israel
Korolev, N., Department of Plant Pathology and Weed Research, ARO, The Volcani Center, Bet Dagan, 50250, Israel
Elad, Y., Department of Plant Pathology and Weed Research, ARO, The Volcani Center, Bet Dagan, 50250, Israel
Resistance to polyoxin AL and other fungicides in Botrytis cinerea collected from sweet basil crops in Israel
A total of 568 B. cinerea isolates were collected from diseased sweet basil plants and the air in 10 sweet basil greenhouses. Mycelial growth tests were used to evaluate the sensitivity of these isolates to benomyl, fenhexamid, iprodione, polyoxin AL and pyrimethanil. EC50 values for polyoxin, the main botryticide on sweet basil in Israel, ranged from 0.4 to 6.5 μg ml-1 and had a bimodal distribution; the EC50 values for sensitive isolates ranged from 0.4 to 1.5 μg ml-1 and the EC50 values for low-level resistant isolates ranged from 4 to 6.5 μg ml-1. Among populations that had not been exposed to polyoxin treatments, 20 to 35 % of the collected isolates were low-level resistant for polyoxin. Polyoxin treatments in an experimental greenhouse shifted the equilibrium in favour of low-level resistant isolates, and the change occurred rapidly: from a frequency of 20 % low-level resistant isolates in the population that had never been treated with polyoxin to a frequency of 72 % after a few treatments over two seasons. Prolonged use of polyoxin in Israeli basil crops (in some sites for more than 10 years) does not appear to have led to the development of high-level resistance, but low-level resistant isolates were found in commercial greenhouses with the frequency of up to 73 %. High-level resistance to benzimidazoles was common (60 to 80 % of isolates) in greenhouses with a history of benzimidazole treatments; whereas 15-25 % of the isolates from greenhouses in which fungicides were not used were resistant. Low-level resistance to dicarboximides was fairly widespread (frequency of 30 to 80 % depending on the greenhouse) and a few cases of moderate resistance to dicarboximides were also noted (frequency of 0 to 9 %). Neither high- nor low-level resistance to anilinopyrimidines was common in sweet basil commercial greenhouses (0 to 7 %). However, 34 % of the isolates were strongly resistant in the experimental greenhouse, following a few treatments with anilinopyrimidine fungicides during the previous season. Before those treatments, the proportion of anilinopyrimidines resistant isolates had been 1 %. About 3 % of the isolates exhibited low-level resistance to fenhexamid and no isolates were found to be strongly resistant to fenhexamid. Low-level resistance to one fungicide was often associated with low-level resistances to other fungicides. Thirty-two phenotypes exhibiting resistance to one or more of the tested fungicides were noted among B. cinerea isolates. Resistant isolates showed similar or reduced fitness parameters in comparison to wild-type isolates. © 2013 KNPV.
Scientific Publication
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