• Horticultural Science & Technology
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• v.18 no.5
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• pp.605-611
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• 2000

This experiment was conducted to examine the effects of foliar application of ethychlozate and ethyclozate mixed with different calcium formulae (clef-non, suical, cell-bine, and calcium acetate monohydrate) on the fruit quality and peel puffing of 'Miyagawa Wase' satsuma mandarin cultivated in a plastic film house. Foliar application of ethychlozate mixed with clef-non or suical showed a result that the 'a' value of peel chromaticity was increased, which are supposed to accelerate peel coloration without peel puffing. The reducing sugar levels of fruits in control, ethychlozate, ethychlozate+celef-non, ethychlozate+suical, ethychlozate+cell-bine, and ethychlozate+calcium acetate monohydrate treatment were 4.98, 5.30, 5.59, 5.00, 5.20, and 4.27%, respectively. Especially, in the case of ethychlozate mixed with clef-non, the reducing sugar level was 0.61% higher than that of control. Sucrose and total sugar content also had a similar trend as that in the reducing sugar contents. The sugar contents of fruits in various ethychlozate treatments mixed with different calcium formulae except those in ethychlozate treatment or ethychlozate treatment mixed with calcium acetate monohydrate were higher than $12^{\circ}Brix$. Especially, the treatment of ethychlozate treatment mixed with clef-non showed the highest sugar content with $12.7^{\circ}Brix$. The ratio of soluble solids to acidity also showed the similar tendency, but there was no significant difference in acidity among the treatments.