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A severe citrus tristeza virus isolate causing the collapse of trees of sour orange before virus is detectable throughout the canopy
Year:
1989
Source of publication :
Annals of Applied Biology
Authors :
Bar-Joseph, Moshe
;
.
Marcus, Ruth
;
.
Volume :
114
Co-Authors:
BEN‐ZE'EV, I.S., Department of Virology, ARO, Volcani Center, Bet Dagan, Israel
BAR‐JOSEPH, M., Department of Virology, ARO, Volcani Center, Bet Dagan, Israel
NITZAN, Y., Microbiological Laboratory, Citrus Agrotechnical Services Ltd, Rehovot, Israel
MARCUS, R., Department of Statistics and Experiment Design, ARO, The Volcani Center, Bet Dagan, Israel
Facilitators :
From page:
293
To page:
300
(
Total pages:
8
)
Abstract:
A rapidly spreading decline of ‘Minneola’ tangelos, ‘Shamouti’ and ‘Valencia’ sweet oranges grafted on sour orange rootstock in the Morasha area, in the coastal plain of Israel, was found to be caused by a severe ‘seedling yellows’ strain of the citrus tristeza virus (CTV). Repeated ELISA tests revealed great variation in distribution of CTV throughout the canopies, even in declining trees. In a substantial number of the declining trees, samples of up to 10 twigs per tree were not always sufficient for CTV detection. The ELISA values (O.D. 405 nm) in the parts found infected were high, whereas in most of the twigs showing negative ELISA results the virus was absent as indicated by biological indexing. The Morasha strain of CTV was also characterised by rapid annual spread rates. The ratio D/E (the proportion of Declining trees found among ELISA‐positive ones) is proposed as a simple index of strain severity. The epidemiological consequences of the uneven distribution of CTV and rapid decline are discussed. Copyright © 1989, Wiley Blackwell. All rights reserved
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More details
DOI :
10.1111/j.1744-7348.1989.tb02105.x
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
28130
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:36
Scientific Publication
A severe citrus tristeza virus isolate causing the collapse of trees of sour orange before virus is detectable throughout the canopy
114
BEN‐ZE'EV, I.S., Department of Virology, ARO, Volcani Center, Bet Dagan, Israel
BAR‐JOSEPH, M., Department of Virology, ARO, Volcani Center, Bet Dagan, Israel
NITZAN, Y., Microbiological Laboratory, Citrus Agrotechnical Services Ltd, Rehovot, Israel
MARCUS, R., Department of Statistics and Experiment Design, ARO, The Volcani Center, Bet Dagan, Israel
A severe citrus tristeza virus isolate causing the collapse of trees of sour orange before virus is detectable throughout the canopy
A rapidly spreading decline of ‘Minneola’ tangelos, ‘Shamouti’ and ‘Valencia’ sweet oranges grafted on sour orange rootstock in the Morasha area, in the coastal plain of Israel, was found to be caused by a severe ‘seedling yellows’ strain of the citrus tristeza virus (CTV). Repeated ELISA tests revealed great variation in distribution of CTV throughout the canopies, even in declining trees. In a substantial number of the declining trees, samples of up to 10 twigs per tree were not always sufficient for CTV detection. The ELISA values (O.D. 405 nm) in the parts found infected were high, whereas in most of the twigs showing negative ELISA results the virus was absent as indicated by biological indexing. The Morasha strain of CTV was also characterised by rapid annual spread rates. The ratio D/E (the proportion of Declining trees found among ELISA‐positive ones) is proposed as a simple index of strain severity. The epidemiological consequences of the uneven distribution of CTV and rapid decline are discussed. Copyright © 1989, Wiley Blackwell. All rights reserved
Scientific Publication
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