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Proceedings of the International Plant Propagator's Society

Vol. 44

Biological Control of Fusarium Wilt of Carnation by Application of Nonpathogenic Fusarium oxysporum

H. Mizuno, T. Komatsu, Y. Fukano and Y. Asakura

pp: 235-238

Fusarium species isolated from the root tissue of carnation were screened for biocontrol activity to fusarium wilt of carnation caused by Fusarium oxysporum f. sp. dianthi. Some isolates showed suppression of fusarium wilt in carnations. The most effective isolate, No 108, was identified as Fusarium oxysporum, and is nonpathogenic to major crops such as tomato, radish, eggplant, and cucumber. No 108 isolate showed a 70% reduction in disease severity 16 weeks after transplanting in field trials. Pre-inoculation with No 108 isolate is considered to be a practical biocontrol agent of fusarium wilt of carnations because it is effective in field trials and nonpathogenic to major crops. Moreover, it showed protective effect when it was inoculated not only just before transplanting, but also at the cutting rooting stage.

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