ISHS Acta Horticulturae 586: IV International Symposium on Olive Growing
EFFECT OF TEMPERATURE, WETNESS DURATION AND LEAF AGE ON INFECTION AND DEVELOPMENT OF OLIVE LEAF SPOT |
| Authors: | J.R. Viruega, A. Trapero |
| Keywords: | Olea europaea, Spilocaea oleagina, Cycloconium oleaginum, peacok¿s spot, quantitative epidemiology. |
| DOI: | 10.17660/ActaHortic.2002.586.172 |
| Abstract:
The effect of temperature, wetness duration and leaf age on infection and development of leaf spot or peacock’s eye spot disease of olive (Olea europaea L.) caused by Spilocaea oleagina (Cast.) Hughes were evaluated in the susceptible cv Picual under controlled conditions. Results showed a negative correlation between leaf age and disease severity, very young leaves being extremely susceptible. In general, disease severity increases with increasing wetness duration, minimum wetness duration for infection being 12 hr. Optimum temperature was around 20 ºC for wetness duration shorter than 24 h, and near 15ºC for longer wetness periods. A polynomial model was used to define disease severity in relation to temperature and wetness duration. | |
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