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Effect of methyl bromide on the control of Fusarium oxysporum f.sp. dianthi propagules in carnation greenhouse soil and on inoculum increase after one growth cycle of carnation
Year:
1994
Source of publication :
Crop Protection
Authors :
בן-יפת, יפת
;
.
מור, יורם
;
.
ראובן, מיכל
;
.
שמולביץ', יהודה
;
.
Volume :
13
Co-Authors:
Ben-Yephet, Y., Plant Pathology Department, Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel
Reuven, M.
Szmulewich, Y.
Mor, Y., Extension Service, Ministry of Agriculture, Tel Aviv, Israel
Facilitators :
From page:
357
To page:
361
(
Total pages:
5
)
Abstract:
The effectiveness of methyl bromide (80 g m-2) on the control of Fusarium oxysporum f.sp. dianthi (F. o. dianthi) was studied at soil depths of 0-60 cm, subdivided into three layers of 0-20, 20-40 and 40-60 cm, in five carnation greenhouses during four successive growth seasons. Each growth season, the number of propagules of F. o. dianthi in the soil was counted before and after fumigation. The efficiency of methyl bromide control was also measured in terms of the viability of F. o. dianthi propagules placed in the soil at depths of 0, 10, 20, 30, 40, 50 and 60 cm. Carnation cultivars (Dianthus caryophyllus) highly susceptible to Fusarium wilt were planted in four of the five greenhouses studied. Moderately resistant cultivars were planted in one greenhouse during three growth seasons and in a second greenhouse during the last growth season. At the end of each growth season, the largest number of propagules (57-100% of total count) was found in the 0-20 cm layer. More inoculum was found in the 20-40 cm than in the 40-60 cm layer. Methyl bromide reduced the F. o. dianthi propagule count at all soil depths between 0 and 60 cm, but was most effective in the upper 30 cm. A count of F. o. dianthi propagules in the soil in fumigated greenhouses on the ten occasions when their level at the end of the previous growth season was high revealed propagule survival rates of 0% (below detection level) five times, 0.1 % twice, 0.6% once, 1.6% once and 4.6% once. The highest count of viable propagules, when methyl bromide was not successful in reducing propagule count to below detection level, was found in the 20-40 cm layer. At the end of each growth season, both inoculum level in the soil and Fusarium wilt incidence varied in the four greenhouses planted with highly susceptible or susceptible carnation cultivars, irrespective of the propagule counts of F. o. dianthi after fumigation. The correlation between inoculum level in the soil after fumigation and inoculum or Fusarium wilt incidence at the end of that growth season was non-significant (r2 = 0.001, p = 0.87 for inoculum; r2 = 0.19, p = 0.2 for wilt incidence). This indicates that in monocultures of susceptible carnation cultivars, methyl bromide cannot give total protection even for one growth season. In each of the two greenhouses planted with moderately resistant cultivars, the number of propagules in the soil at the end of each growth season remained undetectable, as it was after fumigation. © 1994.
Note:
Related Files :
Dianthus caryophyllus
fungal distribution
Fusarium
Fusarium oxyporum f.sp. dianthi
Fusarium oxysporum
methyl bromide
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/0261-2194(94)90050-7
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
26128
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:20
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Scientific Publication
Effect of methyl bromide on the control of Fusarium oxysporum f.sp. dianthi propagules in carnation greenhouse soil and on inoculum increase after one growth cycle of carnation
13
Ben-Yephet, Y., Plant Pathology Department, Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel
Reuven, M.
Szmulewich, Y.
Mor, Y., Extension Service, Ministry of Agriculture, Tel Aviv, Israel
Effect of methyl bromide on the control of Fusarium oxysporum f.sp. dianthi propagules in carnation greenhouse soil and on inoculum increase after one growth cycle of carnation
The effectiveness of methyl bromide (80 g m-2) on the control of Fusarium oxysporum f.sp. dianthi (F. o. dianthi) was studied at soil depths of 0-60 cm, subdivided into three layers of 0-20, 20-40 and 40-60 cm, in five carnation greenhouses during four successive growth seasons. Each growth season, the number of propagules of F. o. dianthi in the soil was counted before and after fumigation. The efficiency of methyl bromide control was also measured in terms of the viability of F. o. dianthi propagules placed in the soil at depths of 0, 10, 20, 30, 40, 50 and 60 cm. Carnation cultivars (Dianthus caryophyllus) highly susceptible to Fusarium wilt were planted in four of the five greenhouses studied. Moderately resistant cultivars were planted in one greenhouse during three growth seasons and in a second greenhouse during the last growth season. At the end of each growth season, the largest number of propagules (57-100% of total count) was found in the 0-20 cm layer. More inoculum was found in the 20-40 cm than in the 40-60 cm layer. Methyl bromide reduced the F. o. dianthi propagule count at all soil depths between 0 and 60 cm, but was most effective in the upper 30 cm. A count of F. o. dianthi propagules in the soil in fumigated greenhouses on the ten occasions when their level at the end of the previous growth season was high revealed propagule survival rates of 0% (below detection level) five times, 0.1 % twice, 0.6% once, 1.6% once and 4.6% once. The highest count of viable propagules, when methyl bromide was not successful in reducing propagule count to below detection level, was found in the 20-40 cm layer. At the end of each growth season, both inoculum level in the soil and Fusarium wilt incidence varied in the four greenhouses planted with highly susceptible or susceptible carnation cultivars, irrespective of the propagule counts of F. o. dianthi after fumigation. The correlation between inoculum level in the soil after fumigation and inoculum or Fusarium wilt incidence at the end of that growth season was non-significant (r2 = 0.001, p = 0.87 for inoculum; r2 = 0.19, p = 0.2 for wilt incidence). This indicates that in monocultures of susceptible carnation cultivars, methyl bromide cannot give total protection even for one growth season. In each of the two greenhouses planted with moderately resistant cultivars, the number of propagules in the soil at the end of each growth season remained undetectable, as it was after fumigation. © 1994.
Scientific Publication
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