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פותח על ידי קלירמאש פתרונות בע"מ -
Effects of Foliar Sprays of Phosphates on Powdery Mildew (Sphaerotheca pannosa) of Roses
Year:
1994
Source of publication :
Journal of Phytopathology
Authors :
ראובני, ראובן
;
.
רביב, מיכאל
;
.
Volume :
142
Co-Authors:
Reuveni, R., ARO, Division of Plant Pathology, Newe Ya'ar Research Center, Haifa, Israel
Agapov, V., Golan Research Institute, University of Haifa, PO Box 97, Kazrine, Israel
Reuveni, M., Golan Research Institute, University of Haifa, PO Box 97, Kazrine, Israel
Raviv, M., ARO, Division of Plant Pathology, Newe Ya'ar Research Center, Haifa, Israel
Facilitators :
From page:
331
To page:
337
(
Total pages:
7
)
Abstract:
Powdery mildew on plants of a local clone of Rosa indica Major was significantly controlled by a single spray of 25 mM aqueous solutions of K2HPO4, KH2PO4 plus KOH, or NaHCO3, all plus Tween 20 (0.5 ml/l) or bupirimate (Nimrod) at 0.5 ml/l, which was applied 4 days before inoculation with conidial suspension of Sphaerotheca pannosa var. rosae. Disease incidence was reduced by 79, 71, 54 and 50%, as compared to controls on plants sprayed with KH2PO4 plus KOH, K2HPO4, NaHCO3 or bupirimate, respectively. Phosphates were suppressive and expressed by disappearance of 99% of the pustules and conidia, as early as 2 days after a single spray on mildewed foliage. This treatment was efficient for at least 9 days after the first application when large infected greenhouse-grown plants were used. Re-application of these salts on the same plants reduced the lesion area by about 90% from that recorded before the application. Phosphate and bicarbonate were more suppressive than the systemic fungicide bupirimate in the early period (up to 2 days). The suppresion effects of bicarbonate and bupirimate, however, were short-term and not persistent, while the phosphate treatments remained significantly suppressive for up to 23 days, when the experiment was terminated. The inhibitory and suppressive effectiveness of phosphate salts is discussed in the light of their possible acceptance as ideal foliar fertilizers which should be considered for use in the field for disease control. © 1994 Blackwell Verlag GmbH.
Note:
Related Files :
Erysiphales
Podosphaera pannosa
Rosa
Rosa indica
עוד תגיות
תוכן קשור
More details
DOI :
10.1111/j.1439-0434.1994.tb00030.x
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
24246
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:06
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Scientific Publication
Effects of Foliar Sprays of Phosphates on Powdery Mildew (Sphaerotheca pannosa) of Roses
142
Reuveni, R., ARO, Division of Plant Pathology, Newe Ya'ar Research Center, Haifa, Israel
Agapov, V., Golan Research Institute, University of Haifa, PO Box 97, Kazrine, Israel
Reuveni, M., Golan Research Institute, University of Haifa, PO Box 97, Kazrine, Israel
Raviv, M., ARO, Division of Plant Pathology, Newe Ya'ar Research Center, Haifa, Israel
Effects of Foliar Sprays of Phosphates on Powdery Mildew (Sphaerotheca pannosa) of Roses
Powdery mildew on plants of a local clone of Rosa indica Major was significantly controlled by a single spray of 25 mM aqueous solutions of K2HPO4, KH2PO4 plus KOH, or NaHCO3, all plus Tween 20 (0.5 ml/l) or bupirimate (Nimrod) at 0.5 ml/l, which was applied 4 days before inoculation with conidial suspension of Sphaerotheca pannosa var. rosae. Disease incidence was reduced by 79, 71, 54 and 50%, as compared to controls on plants sprayed with KH2PO4 plus KOH, K2HPO4, NaHCO3 or bupirimate, respectively. Phosphates were suppressive and expressed by disappearance of 99% of the pustules and conidia, as early as 2 days after a single spray on mildewed foliage. This treatment was efficient for at least 9 days after the first application when large infected greenhouse-grown plants were used. Re-application of these salts on the same plants reduced the lesion area by about 90% from that recorded before the application. Phosphate and bicarbonate were more suppressive than the systemic fungicide bupirimate in the early period (up to 2 days). The suppresion effects of bicarbonate and bupirimate, however, were short-term and not persistent, while the phosphate treatments remained significantly suppressive for up to 23 days, when the experiment was terminated. The inhibitory and suppressive effectiveness of phosphate salts is discussed in the light of their possible acceptance as ideal foliar fertilizers which should be considered for use in the field for disease control. © 1994 Blackwell Verlag GmbH.
Scientific Publication
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