Effect of summer temperature and dryness on the occurrence of fruit physiological disorders, and the establishment of reduction techniques in Japanese pear 'Nikkori'
2016
Kitahara, S. | Ishioroshi, Y. | Oya, Y.
Fluctuations in climate have increased the occurrence of water-soaked disorders in the Japanese pear 'Nikkori' cultivated Tochigi Prefectural Agricultural Experiment Station, and this disorder has become a problem in the production field. Therefore, environmental factors related to the occurrence of these physiological disorders and techniques to decrease occurrence were examined in the present study. First, we investigated the effects of high temperature and dryness on Japanese pear trees. High temperature and dryness in summer (between 90 and 150 days after the full blossom) increased the rate of occurrence of water-soaked disorder. We also examined the effectiveness of covering the fruit with bags in order to restrain the change of fruit temperature. Covering the fruit with bags minimized changes in fruit temperature, with high shading rates 90 days after full blossom to harvest, and decreased the severity of the water-soaked disorder that occurred in the fruits.
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