Biological Control of Phytophthora Blight in Periwinkles by Burkholderia gladioli

以Burkholderia gladioli生物防治長春花疫病

歐陽瑋(Wei OuYang) ； 吳文希(Wen-Shi Wu)

《植物病理學會刊》 7卷1期 (1998/03) Pp. 27-32

https://doi.org/10.6649/PPB.199803_7(1).0004

摘要

長春花( Catharanthus roseus (L.) G. Don )在本省以Phytophthora parasitica Dastur所造成之長春花疫病最爲嚴重，亦是夏季長春花產量減少之主因。由土壤中分離出之微生物經篩選後，發現Burkholderia gladioli對於P. parasitica之生長具有明顯之抑制作用，並且於長春花幼苗株高、鮮重與植株存活率之分析上，凡添加B. gladioli之處理均較佳，且與只接種P. Parasitica的對照組呈顯著(P=0.05)之差異。

關鍵字

生物防治 ； 長春花疫病

並列摘要

Periwinkle (Catharanthus roseus (L.) G. Don) blight caused by Phytophthora parasitica Dastur is a serious and wide-spreaded soil-borne disease in Taiwan. Root and stem rots were also observed frequently in humid conditions. Burkholderia gladioli was isolated and identified to be antagonistic to P. parasitica. B. gladioli could not only suppress the growth of P. parasitica in vitro, but decrease the rate of disease development in periwinkles. The hyphae of P. parasitica were collapsed by B. gladioli on the cultural medium. Plant height, fresh weight and the percentage of periwinkle seedling survived were significantly (P=0.05) higher in those treatments applied with B. gladioli compared with the non-treated control.

並列關鍵字

Biological control ； blight ； Phytophthora parasitica ； Burkholderia gladioli