溫水處理對進品蔬菜種子附著菌類之防治效果及對種子發芽之影響

Eradication of Seed-borne Organisms from Imported Vegetable Seeds by Hot-water Treatment

溫水40，50，60，及65℃處理甘藍、白菜、胡蘿葡及萵苣等七種進口蔬菜種子。經吸水紙法培養萵苣種子無菌類附著。溫水處理可減少其他六種種子的附著菌類，且菌類之出現率隨溫度及處理時間之增加而降低。溫水65℃幾乎完全使供試之蔬菜種子不發芽。60℃處理對蔬菜種子之發芽影響極烈。50℃以10分鍾處理種子之發芽無影響，但隨處理時間之增長，種子發芽率及發芽勢係數之減少則愈大。40℃僅以40分鍾之處理，對萵苣種子之發芽略有影響外，對其他蔬菜種子均無影響。

In order to eliminate the seed-borne disease, seven kinds of imported vegetable seeds (cabbage, pakchoi, chinese cabbage, semi-heading chinese cabbage, spinach, carrot and lettuce) were treated by hot-water at 40, 50, 60 and 65°C for 10, 20, 30 and 40 minutes respectively. The seed-borne fungi and seed germination test were examined by using blotter method. In these experiments, the hot-water treatment reduced the percentage of fungi-contaminated seeds However, hot-water treatment was unable to control the seed-borne diseases completely. Not only the germination of all tested seeds were inhibited at 65℃, but the germination rate and the coefficient of velocity were also seriously reduced at 60℃, The treatment at 50℃ for 10 mm. had no detrimental effect on The seed germination, but long-time treatments could reduce the germination rate and the coefficient of velocity. None of the treatment at 40℃ for 40 mm. had detrimental effect on the seed germination except lettuce.