บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Influence of chemical treatment on occurrence and prevention of bitter pit during apple fruit maturing-stage.

Lee HanChan; Choi InMyung; Kim WoolSu;

RDA Journal of Crop Protection Year: 1997 Vol: 39 Issue: 2 Pages: 25-33 Ref: 13 ref.

1997

บทคัดย่อ

Influence of chemical treatment on occurrence and prevention of bitter pit during apple fruit maturing-stage.

In order to predict bitter pit by pit like-symptom (BPLS) and prevent bitter pit in 'Tsugaru' and 'Fuji' apple, a study was carried out at the National Horticultural Research Institute in Suwon, Korea Republic, from 1994 to 1995. BPLS was induced by 0.1 M MgCl2 containing 0.3 M Sorbitol and 0.1% Tween 10. Fruits were infiltrated with a vacuum (10torr) in this solution. After storage at 4 deg C for 7 days, fruits were placed at room temperature (c. 20 deg ) for 3 days in 'Tsugaru' and 5 days in 'Fiji' apples, respectively. The BPLS rate of 'Tsugaru' was 80-100% 20 days before harvest. The BPLS rate of 'Fuji' was higher 20 days before harvest. Vacuum infiltration was more effective in BPLS induced 'Tsugaru' than moderate infiltration. The longer the infiltration time was, the higher the BPLS rate in 'Tsugaru'. Low temperature storage (4 deg ) was more effective in BPLS induction of 'Tsugaru' than room temperature storage (20 deg ). BPLS-fruit had a higher Mg content in apple fruit skin. The Ca con

tent of 'Fuji' fruit skin was higher in the stem end than in the calyx end. The Mg/Ca ratio of 'Fuji' fruit skin was higher in BPLS-fruit than in healthy fruit. CaCl2 + Xanthan gum dipping was more effective than CaCl2 + Tween 20 dipping in Ca absorption of 'Tsugaru' fruit skin. CaCl2 spray increased the Ca content of fruit skin and decreased bitter-pit in 'Tsugaru' and 'Fuji' apple.