2006 Volume 5 Issue 4 Pages 409-413
Cultivar ‘F1 Candy Marine’ and ‘F1 Neo Peach’ of Eustoma grandiflourum were grown in various seasons to investgate the correlation between the coloration rate of petal and temperature. The correlation between the product aristhmetic time below 20°C and petal coloration were examined. The main findings of this study were as follows; 1. The coloration of the petal in colored picotee cultivars is normal when harvested between May and November and the coloration area expanded from winter through spring. In January and February the coloration area reached 80% of the whole petals. 2. As for the coloration rate of petals, the coefficient of positive is high significantly with the product arithmetic time below 20°C. 3. The coloration rate of the petal increased markedly when the time below 20°C during the sixty days before harvest increased to more than 800 hours.
