บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Fumigation of fruit with acetic acid to prevent postharvest decay.

Sholberg, P. L.; Gaunce, A. P.;

HortScience Year: 1995 Vol: 30 Issue: 6 Pages: 1271-1275 Ref: 18 ref.

1995

บทคัดย่อ

Fumigation of fruit with acetic acid to prevent postharvest decay.

ABSTRACT :

 

Acetic acid (AA) as a vapour at low concn was effective in preventing fruit decay by postharvest fungi. Fumigation with 2.7 or 5.4 mg AA/litre in air at 2 and 20 deg C reduced germination of Botrytis cinerea and Penicillium expansum conidia to zero after they had been dried on 0.5-cm square pieces of dialysis tubing. Decay of Golden Delicious, Red Delicious and Spartan apples inoculated with 20 micro l drops of conidia of B. cinerea (1.0 x 105 conidia/ml) or P. expansum (1.0 x 106 conidia/ml) was prevented by fumigating with 2.0 and 2.7 mg AA/litre, respectively. Tomatoes, grapes and kiwifruit inoculated with B. cinerea or Navel oranges inoculated with P. italicum did not decay when fumigated with 2.0 mg AA/litre at 5 deg . AA fumigation at low temp. (1 deg and 5 deg ) with 2.0 or 4.0 mg AA/litre prevented decay of Spartan and Red Delicious apples and Anjou [Beurre d'Anjou] pears inoculated with B. cinerea and P. expansum, respectively. Spartan apples immersed in a suspension of P. expansum coni

dia (1.4 x 105 conidia/ml) and fumigated with 2.7 mg AA/litre at 5 deg had an average of 0.7 lesions/fruit compared with 6.1 for nontreated fruit. Increasing the RH from 17% to 98% increased the effectiveness of AA fumigation at 5 deg and 20 deg . At the concn used in the trials, AA had no apparent phytotoxic effects on the fruit. It is concluded that the potential for commercial fumigation with AA to control postharvest decay of fruit and vegetables appears promising.