|Title:||臺灣柑橘之疫病||Other Titles:||Phytophthora Diseases of Citrus in Taiwan||Authors:||安寶貞
|Keywords:||柑橘;疫病菌;Citrus, Phytophthora||Issue Date:||Dec-1989||Publisher:||農業試驗所||Start page/Pages:||212-221||Source:||農業試驗所特刊第27號||Conference:||柑橘試驗研究成果專題研討會專集||Abstract:||
自1976年7月至1980年5月，自本省15縣229柑橘園內採集土壤及罹病之果實、葉片及莖部組織。利用葉片誘釣法及配合選擇性培養基分離，疫病菌可自14縣108果園中分得。依疫病菌之分離頻率及重要性，依次如下；A1及A2型的phthora parasitica及P. palmivora分佈於中南部柑橘園中，P. parasitica引起根腐病及鋸腐病，而P. palmivora引起根腐病及褐腐病；A1型的P. citrophthora及P. cinnamomi與同絲性之P. citricola存在於中部以北地區，主要為害根系。以上5種疫病菌均對甜橙有病原性。而P. heave, P. insolita及P. humicola僅自土壤中分得，對甜橙無病原性。在檢定之79種柑橘品種系中，甜橙類對P. parasitica及P. palmivor抵抗力最弱；椪柑、桶柑、檸檬及葡萄柚次之；酸橘、枳橙及廣東檸檬中感；部份柚類中等；酸橙、根殼及紅柚為中抗；金柑類及烏柑刺則具強烈之抗性。
From July 1976 to May 1980 soils and diseased fruit, leaves and stems were collected from 229 citrus orchards in all 15 counties on the island of Taiwan, and assayed for the presence of Phytophthora by baiting with discs of citrus leaves and plating on selective medium. Phytophthora species were isolated from 108 citrus orchard in 14 counties. Based on the frequency of isolation and pathogenicity to citrus, both of A1 and A2 mating types of P. parasitica and P. palmivora were isolated from the central and southern area. P. parasitica was the main pathogen causing foot rot, and root rot, while P. palmivora causing fruit brown rot and root rot. A1 but not A2 types of P. citrophthora and P. cinnamorni, and P. citricola (Homothallism) were mainly distributed on the central and northern regions, causing citrus root rot. All of the 5 species were pathogenic to sweet orange. P. heave, P. insolita and P. humicola infrequently isolated from soils were non-pathogenic to sweet orange.
One to two months old citrus seedling were planted in artifical inoculated-diseased soils for testing of resistance to P. parasitica and P. palmivora. Of 79 citrus and related tested varieties, sweet orange (9 varieties) were most susceptible; ponkan, tankan, lemons and grape fruit were next; sunki, troyer and rangpur lime were susceptible; some of pummelo were morderate; sour orange, trifoliate orange and red pummelo were morderately resistant; while Severinia and Kumquat were high resistant.
|Appears in Collections:||植物病理組|
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