Phytophthora Blight of Peace Lily in Taiwan
Other Title
台灣白鶴芋疫病
Journal
植物病理學會刊
Journal Volume
9
Journal Issue
4
Pages
145-150
Date Issued
2000-12
Author(s)
Abstract
Phytophthora parasitica (= P. nicotianae) has been detected from the diseased tissues of peace lily (Spathiphyllum kochii) since 1992 in Taiwan. The pathogen caused severe leaf blight, root rot and death of the whole plants of the ornamental plant in many fields. A total of 19 A1 and 8 A2 isolates of P. parasitica were obtained from 7 fields distributing in Taipei, Nantow, Changhua, Chiayi and Tainan. After stored for 3 8 years, 8 of 16 A1 isolates changed to A2 type and 2 to A1 A2 type. However, none of A2 isolates changed. Disease symptoms similar to appearing in the fields were reproduced when plantlets of peace lily were inoculated with zoospore suspension of P. parasitica in pathogenicity tests. Three-month-old plantlets of peace lily showed high susceptibility to the pathogen and more than 80% inoculated plantings were killed within one month. Phytophhtora parasitica was reisolated from all artificially infected tissues. The peace lily isolates of P. parasitica were pathogenic to three of four members of aroids, including Anthurium andreanum, Epiprenmum aureum, Philodendron seandens subsp. Oxycardium, which have been record as hosts of the pathogen in Taiwan and vice versa. The pathogen did not caused disease symptoms on Dieffenbachia amoena. Phytophthora disease of peace lily is reported for the first time in Taiwan.
在台灣，白鶴芋罹患疫病首次於1992年在嘉義發現，病原菌為 Phytophthora parasitica。該菌危害白鶴芋時，造成葉枯與根腐，嚴重時導致全株死亡。自1992至1997年，於台北、南投、彰化、嘉義、台南等地之七處花園中共分離的到27株，包括19株A1與8株A2，經鑑定均為標準型的P. parasitica。菌絲塊經過3-8年不同時間於24°C下保存於無菌水中貯藏，存活的16株A1菌株中，有8株的配對型改變成A2，2株變成A1A2，只有6菌株仍然為A1配對型。然而，存活的8株A2菌株均仍然為A2，配對型未曾改變。白鶴芋幼苗在接種分離得到的P. parasitica疫病菌遊走子懸浮液（105-6zoospores/ml）後，都出現與田間自然發病時相同的病徵。由於白鶴芋幼苗十分罹病，在接種一個月後，80%以上之植株均會死亡，而且相同的疫病菌均可自發病組織回分得到。在病原性測定試驗中，自白鶴芋分離的P. parasitica亦同時可感染火鶴花（Anthurium andreanum）、心葉蔓綠絨（Philodendron scandens subsp. Oxycardium）、及黃金葛（Epiprenmum aureum）等三種天南星科觀賞植物，反之亦然。但該菌不危害夏雪黛粉葉（Dieffenbachia amoena）。白鶴芋疫病為首次在台灣報導。
Subjects
new disease record
phytophthora parasitica
mating type
peace lily (Spathiphyllum kochii)
白鶴芋
疫病
配對型
新紀錄
Publisher
中華民國植物病理學會
Type
journal article