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Lin mark this message contains misinformation
originally written by Lin
茭白筍裡的黑色斑點,就是菰黑粉菌的寄生殘留,如果黑點過多,賣相不好,口感也偏空洞粗糙,農民通常會淘汰不出貨。如果只有少許斑點,對口感不會有太大的影響,可以煮熟後正常食用。

References

https://www.commonhealth.com.tw/article/article.action?nid=77714

茭白筍的黑點是發霉嗎?原來它是「病態」產物 - 康健雜誌

夏天的菜市場裡,白白淨淨的茭白筍,一見就覺得涼爽。不過白色的筍身,切開後竟然會出現黑色斑點,「這是發霉?」、「吃下去會中毒嗎?」、「煮熟就可以吃?」 在搞清楚茭白筍為什麼會帶著黑斑前,要先從茭白筍是怎麼長出來開始說起。又名美人腿的茭白筍,台語叫它「腳白筍」,命名取它白白淨淨像是美女的腿一般,

https://www.commonhealth.com.tw/article/article.action?nid=77714
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