ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Extending strawberry fruit shelf life with pyrrolnitrin

Takeda, F. and Janisiewicz, W. J.

The strawberry into the 21st century. Proceedings of the Third North American Strawberry Conference, Houston, Texas, 14-16 February, 1990 Year: 1991 Pages: 174-176.

1991

บทคัดย่อ

The effect of a naturally occurring antifungal compound, pyrrolnitrin (3-chloro-4-(2'-nitro-3-chlorophenyl)-pyrrole), isolated from Pseudomonas cepacia, on postharvest fruit rot (Botrytis) was studied. Strawberry cv. Allstar plants were sprayed weekly with benomyl and captan from anthesis in 1989. The day before harvest, the fruits were sprayed with benomyl, or 0, 100 or 200 mg pyrrolnitrin/litre. After harvest, the marketable fruits were stored at 18 deg , or at 1 deg C for 7 days before transfer to 18 deg . Rotting fruits were recorded and removed daily. In a second experiment, harvested fruits were dipped for 30 to 60 s in pyrrolnitrin at 0, 50, 100 or 200 mg/litre; the control fruits were not dipped. Fruits were stored at 18 deg for 11 days. In the first experiment, none of the treatments applied the day before harvest reduced the amount of rotting. Postharvest dipping, however, did reduce fruit rot. The control fruits started rotting after day 3 and, by day 10, >50% of the fruits were rotting. The lowest concentration of pyrrolnitrin delayed rotting by 1 day while the 2 higher concentrations delayed it by 4 days. All 3 rates limited rotting to 10% until day 10. Shelf life was effectively doubled with concentrations of pyrrolnitrin as low as 50 mg/litre.