Effect of temperature, humidity and packaging atmosphere on post-harvest disease of okra [Hibiscus esculentus] pods caused by Alternaria alternata
2001
Suzuki, Y. (Kochi-ken. Inst. of Agricultural and Forest Science, Ino (Japan)) | Okabayashi, H.
The environmental effects of the post-harvest, market disease of Okra pods caused by Alternaria alternata were studied. The results of this study are concluded as follow: 1. The lesions caused by Alternaria alternata were observed in storage at 10 - 30 deg C . The appearance of lesions depended on the storage temperature. The occurrence of lesions were severe during storage at 20 deg C or higher, while they were slight during stotage at 10 deg C, however, later the lesions increased rapidly. The lesiohs decreased remarkably below 6 deg C . However, Okra pods storaged below 6 deg C caused pitting from the cool temperatures and the quality of the Okra pods declined. 2. The lesions increased when the relative humidity was above 95%, while the occurrence of the disease declined below 90% relative humidity. 3. Packaging made with a density of O2 above 2.6% and CO2 below 20.6%, produced many lesions. When the density of O2 was below 0.6%, and CO2 was above 27.9%, the lesion did not occur, but this packaging atmosphere caused pitting and an offensive smell, so the quality of Okra declined.
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