粗肋草細菌性軟腐病的化學及生物防治之初步探討

Preliminary tests for chemical and biological control of bacterial soft rot of Aglaonema

馮靖廷(Feng, C. T.) ； 賴梅瑛(Lai, M. Y.) ； 陳麗玲(Chern, L. L.) ； 何婉清(Ho, W. C.)

《植物保護學會會刊》 50卷3&4期 (2008/12) Pp. 107-115

https://doi.org/10.6715/PPB.200812_50(3_4).0004

摘要

無資料

關鍵字

粗肋草 ； 細菌性軟腐病 ； 軟腐細菌 ； 化學防治 ； 生物防治

並列摘要

Aglaonema bacterial soft rot caused by Pectobacterium chrysanthemi in Taiwan has only been found on cultivar 'Sithiporn' in the field. Under environment conducive to the disease progress, the pathogen was able to infect more than 80 % of the Aglaonema cv. 'Sithiporn' plants in some major nurseries. When isolate ASR-3, a highly virulent strain of P. chrysanthemi isolated from A. cv. 'Sithiporn', was used to inoculate detached leaves of Oncidium sp. and Phalaenopsis sp. it could cause the same soft rot symptoms. This study was conducted to screen for biological control agents and chemicals against bacterial soft rot disease of Aglaonema. Sixteen strains of Trichoderma spp., Psuedomonas fluorescens OFP-7 and Bacillus subtilis (Tai-K Bacillus) were tested by using cellophane paper antibiotic method. Results showed that Trichoderma sp. T1 isolate and the fluorescent pseudomonad OFP-7 were inhibitory to the growth of ASR-3. When culture filtrates or spore suspensions were tested for disease control, OFP-7 and Tai-K Bacillus were able to prevent infection of detached leaves of Aglaonema by ASR-3, but could not stop the disease once infection occurred. Among the agrochemicals tested, none of the three copper chemicals could restrain the growth of ASR-3, but four antibiotics showed inhibitory effects. According to the results of detached leaves tests, thiophanate methyl plus streptomycin (500x and 1000x) showed better protection than other antibiotics. None of the antibiotics were therapeutic to the soft rot disease of Aglaonema.

並列關鍵字

Aglaonema spp. ； bacterial soft rot ； Pectobacterium chrysanthemi ； chemical control ； biological control