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פותח על ידי קלירמאש פתרונות בע"מ -
Effects of initial inoculum and cultivar resistance on incidence of Fusarium wilt and population densities of Fusarium oxysporum f. sp. dianthi on carnation and in soil
Year:
1996
Source of publication :
Phytopathology
Authors :
בן-יפת, יפת
;
.
צוויבל, אאידה
;
.
ראובן, מיכל
;
.
שטיינברג, דני
;
.
Volume :
86
Co-Authors:
Ben-Yephet, Y., Department of Plant Pathology, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Reuven, M., Department of Plant Pathology, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Zviebil, A., Department of Plant Pathology, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Shtienberg, D., Department of Plant Pathology, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
751
To page:
756
(
Total pages:
6
)
Abstract:
The effects of initial inoculum and cultivar resistance on the incidence of Fusarium wilt and the population densities of Fusarium oxysporum f. sp. dianthi on carnation and in soil were studied in the field and in large containers filled with naturally infested soil. Five carnation cultivars that ranged in their response to Fusarium wilt from completely resistant ('Scarlette'), highly resistant ('Eveline'), moderately resistant ('Galit'), susceptible ('Lior'), to highly susceptible ('Hermon') were included in all experiments. In the field, Fusarium wilt incidence and counts of CFU of F. oxysporum f. sp. dianthi recovered from soil or plants increased with time. The magnitude of that increase and the final population density of the pathogen, however, were affected by the degree of cultivar resistance. For example, the number of CFU of the pathogen on stems of cultivar Hermon was 10,000-fold higher than that on cultivar Scarlette. Population densities of the pathogen on plant stems were linearly related to disease incidence; the more severe the disease, the larger the number of CFU of F. oxysporum f. sp. dianthi recovered. The pathogen also was recovered (about 104 CFU/g of plant) from symptomless plants. A similar relationship was observed in soil, sampled from beneath plants, except that the increase in CFU was not linear and pathogen CFU leveled off gradually at high disease incidence. In containers, disease incidence increased significantly (P < 0.05) with increasing initial inoculum levels for the susceptible, but not for the resistant, cultivars. The number of F. oxysporum f. sp. dianthi CFU in soil increased for the cultivars Hermon, Lior, and Galit, but not for 'Eveline' or 'Scarlette'; in the stems, the number of CFU increased for all cultivars.
Note:
Related Files :
Fusarium oxysporum
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
20290
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:35
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Scientific Publication
Effects of initial inoculum and cultivar resistance on incidence of Fusarium wilt and population densities of Fusarium oxysporum f. sp. dianthi on carnation and in soil
86
Ben-Yephet, Y., Department of Plant Pathology, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Reuven, M., Department of Plant Pathology, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Zviebil, A., Department of Plant Pathology, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Shtienberg, D., Department of Plant Pathology, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Effects of initial inoculum and cultivar resistance on incidence of Fusarium wilt and population densities of Fusarium oxysporum f. sp. dianthi on carnation and in soil
The effects of initial inoculum and cultivar resistance on the incidence of Fusarium wilt and the population densities of Fusarium oxysporum f. sp. dianthi on carnation and in soil were studied in the field and in large containers filled with naturally infested soil. Five carnation cultivars that ranged in their response to Fusarium wilt from completely resistant ('Scarlette'), highly resistant ('Eveline'), moderately resistant ('Galit'), susceptible ('Lior'), to highly susceptible ('Hermon') were included in all experiments. In the field, Fusarium wilt incidence and counts of CFU of F. oxysporum f. sp. dianthi recovered from soil or plants increased with time. The magnitude of that increase and the final population density of the pathogen, however, were affected by the degree of cultivar resistance. For example, the number of CFU of the pathogen on stems of cultivar Hermon was 10,000-fold higher than that on cultivar Scarlette. Population densities of the pathogen on plant stems were linearly related to disease incidence; the more severe the disease, the larger the number of CFU of F. oxysporum f. sp. dianthi recovered. The pathogen also was recovered (about 104 CFU/g of plant) from symptomless plants. A similar relationship was observed in soil, sampled from beneath plants, except that the increase in CFU was not linear and pathogen CFU leveled off gradually at high disease incidence. In containers, disease incidence increased significantly (P < 0.05) with increasing initial inoculum levels for the susceptible, but not for the resistant, cultivars. The number of F. oxysporum f. sp. dianthi CFU in soil increased for the cultivars Hermon, Lior, and Galit, but not for 'Eveline' or 'Scarlette'; in the stems, the number of CFU increased for all cultivars.
Scientific Publication
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