ISHS Acta Horticulturae 51: Symposium on Protected Cultivation of Flowers and Vegetables
INFLUENCE OF TEMPERATURE REGIME ON VIRUS DISEASES IN CUCUMBER |
| Author: | H.J.M. van Dorst |
| Abstract:
After infection with cucumber mosaic virus a low temperature hastenes the dying off of cucumber plants and influences strongly the quality of the fruits. At higher temperatures the plants stay alive much longer and fruit quality is only slightly affected. If the minimum temperature is below 15°C, the plants may wilt already 3 weeks after infection, whilst the fruits may be damaged up to 90%. If the minimum temperature is 21°C wilting of the plants starts about 6 weeks after inoculation and fruit damage is only 6%. To prevent economic losses due to cucumber mosaic virus in cucumbers grown in autumn as much as possible the minimum day- and night temperature should be at least 21°C. After infection with the viroid causing cucumber palefruit disease a high temperature shortens the incubation period. Besides the percentage of diseased plants increases and the symptoms become more pronounced. At 20°C day- and night temperature 70% of the inoculated plants become infected and the average incubation period is 11 weeks. At 30°C day- and night temperature 100% of the plants become infected and the average incubation period is three weeks. The symptoms on the fruits are not affected by high or low temperatures. In both causes the quality is poor. | |
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