Effects of environmental factors affecting fruit growth on the incidence of 'Kohansho' disorder in stored hassaku (Citrus hassaku hort. ex Tanaka) fruit
1997
Chikaizumi, S. (Ehime Univ., Matsuyama (Japan). Coll. of Agriculture) | Hino, A. | Akiyoshi, H. | Mizutani, F.
Effects of environmental factors that affect fruit growth on the incidence of Kohansho disorder of stored Hassaku (citrus hassaku hort. ex Tanaka) fruit were investigated. Fruit harvested from different trees showed a wide variation of the incidence from 25% to 90%. However, location of fruit on the tree, soil types (granite or clay) and rind texture (smooth or rough) little affected the occurrence of the disorder. Early fruit harvesting tended to decrease the injury and large-sized fruit are more likely susceptible. Fruit exposed to sun light during growing season showed greater incidence than shaded fruit. The rim of injured part became a little reddish. Virus-infected trees with stem pitting produced fruit with sunken V-shaped spots on the rind, apparently different from those of Kohansho disorder
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