Effect of some pre and postharvest treatments on decay of green mold of satsuma mandarins.
Yildiz, F., Yildiz, M., Kinay, P., Sen, F. and Karacali, I.
ISHS Acta Horticulturae 553: 443-446.
2001
บทคัดย่อ
The effects of some pre- and postharvest treatments on the development of green mould on satsuma mandarin fruits were investigated. Preharvest treatments applied approximately 3 months before harvest included calcium chloride at 2%, benomyl at 60 g per 100 litres, and 2,4-D and gibberellic acid at 10 micro g/ml. For wound healing tests, the following treatments were conducted: inoculation immediately with Penicillium digitatum at 104 spores/ml; exposure to UV-C light for 10 minutes and storage in the dark at 21 deg C for 24 h before inoculation; and storage in polyethylene sheets at 30 deg C for 3 days prior to inoculation. Postharvest treatments included inoculation with P. digitatum, dipping in water at 24 and 54 deg C 24 h after inoculation in the presence of the fungicides, thiabendazole (Tecto Sc, 42.9%) and imazalil (Deccozil, 50%) at 1000 micro g/ml. The fruits were either stored at 25 deg C or at 5 plus or minus 1 deg C, with 85-90% relative humidity. Decay rate was evaluated weekly at 25 deg C storage and monthly at 5 plus or minus 1 deg C storage. Low disease incidence was observed in fruits treated with benomyl. High disease severity was observed in fruits treated with calcium chloride. In wound healing tests, green mould was lower in inoculated fruits kept at 30 deg C than in other treatments. A decrease in decay percentage was observed when fruits were dipped in fungicide solutions at 24 and 54 deg C, particularly with imazalil. However, a phytotoxic effect was observed in the treatment with imazalil and hot water at 54 deg C.