A new problem which arose, as described by plant pathologist Tu Tze-chiang, was that harmful bacteria could penetrate the plastic bags.
據曾任職台灣省農業試驗所的植物病理學家杜自強說，太空包栽培法最大的問題是塑膠袋的密度不夠，外界有害的細菌會侵入，破壞木耳菌絲的發育。