251. Postharvest fruit rots of kiwifruit (Actinidia deliciosa) in Korea
- Author
-
Jae-Seoun Hur, Young Jin Koh, and Jae Sung Jung
- Subjects
Actinidia deliciosa ,biology ,technology, industry, and agriculture ,food and beverages ,Ripening ,Botryosphaeria dothidea ,Horticulture ,biology.organism_classification ,Agronomy ,Postharvest ,Potato dextrose agar ,Agronomy and Crop Science ,Diaporthe actinidiae ,Mycelium - Abstract
The overall disease incidence of postharvest fruit rots of kiwifruit (Actinidia deliciosa) in Korea averaged 32%, but the incidence ranged from 5% to 68% in the orchards surveyed. The percentage of kiwifruit showing internal and external symptoms were 21.9% and 4.9%, respectively, and an additional 5.2% of the kiwifruit showed both internal and external symptoms. Botryosphaeria dothidea and Diaporthe actinidiae cause ripe rot and stem‐end rot, respectively, and were identified as the major postharvest pathogens with average isolation rates of 83.3% and 11.9%. Incidence of the postharvest fruit rots was closely correlated with ripening temperatures favourable to the mycelial growth of the major pathogens. Postharvest fruit rots occurred at all ripening temperatures 11°C and maximum disease incidence was observed at 29°C. No mycelial growth of B. dothidea and D. actinidiae occurred on potato dextrose agar plates under 11°C and the optimum temperature ranges for mycelial growth of the pathogens were...
- Published
- 2005