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Piper aduncum (喬木, 灌木)   |
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一般影響
太平洋地區的有害植物，當收割卡瓦作物時，它會混雜在卡瓦作物(卡瓦胡椒)，降低其品質。還會與卡瓦和其他農作物競爭。可能會是卡瓦作物害蟲和病原體的寄主(植物保護處, 2001)。
地點特有的影響：Viti Levu Is. (Fiji) 
傳播疾病: Although not proven, it is believed that P. aduncum has the potential to act as an alternate host for pathogens of kava (P. methysticum).
競爭: Outcompetes other plants, including kava (Piper methysticum).
經濟 /民生: Competition and mixing with harvested kava (Piper methysticum) has the potential to affect export earnings from this product.
農業: May become mixed with kava (Piper methysticum) during harvesting, lowering the quality of the kava. Panama
競爭: Outcompetes other plant species.
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