Epidemiology of grapevine downy mildew in the Western Cape province of South Africa
Based on the occurrence of PlaslI10para viticola (B. & C.) Ber!. & De T. since its first appearance in 1968, the Western Cape was divided into ""disease-incidence"" zones. Meteorological and other data were used to clarify the pattern of disease distribution. Climatic con...
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| Veröffentlicht in: | Phytophylactica 1969-01, Vol.1 (2), p.135-140 |
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| creator | Marais, P.G. and Knox-Davies, P.S. |
| description | Based on the occurrence of PlaslI10para viticola (B. & C.) Ber!. & De T. since its first appearance in 1968, the Western Cape was divided into ""disease-incidence"" zones. Meteorological and other data were used to clarify the pattern of disease distribution. Climatic conditions favoured spring infection in most areas, but summer weather was normally too dry for disease development. Dry weather for longer than nine weeks eliminated the fungus from infected leaves on the vines. It is postul. �ted that regularity of summer rainfall periods and absence of south-easterly wind led to the ]968/69 epidemic and that various local climatological and topographical factors influenced disease development in subsequent seasons. Cultural practices also played a part and for this reason all nurseries, regardless of their location, are included in the zone of maximum disease incidence. Control measures are suggested for the various disease-incidence zone |
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Ber!. & De T. since its first appearance in 1968, the Western Cape was divided into ""disease-incidence"" zones. Meteorological and other data were used to clarify the pattern of disease distribution. Climatic conditions favoured spring infection in most areas, but summer weather was normally too dry for disease development. Dry weather for longer than nine weeks eliminated the fungus from infected leaves on the vines. It is postul. �ted that regularity of summer rainfall periods and absence of south-easterly wind led to the ]968/69 epidemic and that various local climatological and topographical factors influenced disease development in subsequent seasons. Cultural practices also played a part and for this reason all nurseries, regardless of their location, are included in the zone of maximum disease incidence. 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Ber!. & De T. since its first appearance in 1968, the Western Cape was divided into ""disease-incidence"" zones. Meteorological and other data were used to clarify the pattern of disease distribution. Climatic conditions favoured spring infection in most areas, but summer weather was normally too dry for disease development. Dry weather for longer than nine weeks eliminated the fungus from infected leaves on the vines. It is postul. �ted that regularity of summer rainfall periods and absence of south-easterly wind led to the ]968/69 epidemic and that various local climatological and topographical factors influenced disease development in subsequent seasons. Cultural practices also played a part and for this reason all nurseries, regardless of their location, are included in the zone of maximum disease incidence. 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Ber!. & De T. since its first appearance in 1968, the Western Cape was divided into ""disease-incidence"" zones. Meteorological and other data were used to clarify the pattern of disease distribution. Climatic conditions favoured spring infection in most areas, but summer weather was normally too dry for disease development. Dry weather for longer than nine weeks eliminated the fungus from infected leaves on the vines. It is postul. �ted that regularity of summer rainfall periods and absence of south-easterly wind led to the ]968/69 epidemic and that various local climatological and topographical factors influenced disease development in subsequent seasons. Cultural practices also played a part and for this reason all nurseries, regardless of their location, are included in the zone of maximum disease incidence. Control measures are suggested for the various disease-incidence zone</abstract><pub>Department of Agriculture (South Africa)</pub></addata></record> |
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| identifier | ISSN: 0370-1263 |
| ispartof | Phytophylactica, 1969-01, Vol.1 (2), p.135-140 |
| issn | 0370-1263 |
| language | eng |
| recordid | cdi_sabinet_saepub_10520_AJA03701263_380 |
| source | EZB Electronic Journals Library |
| subjects | disease-incidence zones Epidemiology of grapevine downy mildew Meteorological data |
| title | Epidemiology of grapevine downy mildew in the Western Cape province of South Africa |
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