Biological control of postharvest diseases of apple and pear under semi-commercial conditions using three saprophytic yeasts

被引:91
作者
ChandGoyal, T [1 ]
Spotts, RA [1 ]
机构
[1] UNIV CALIF RIVERSIDE, DEPT PLANT PATHOL, RIVERSIDE, CA 92521 USA
关键词
thiabendazole; Penicillium expansum; blue mold; Cryptococcus laurentii; Cryptococcus infirmo-miniatus; Rhodotorula glutinis; Pyrus communis; Malus pumila;
D O I
10.1006/bcon.1997.0568
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The yeasts Cryptococcus Laurentii (strain HRA5), Cryptococcus infirmominiatus (strain YY6), and Rhodotorula glutinis (strain HRB6) were tested as biocontrol agents of postharvest diseases of apple and pear in semi-commercial and commercial trials, The yeasts effectively controlled decay when applied in a drench or line spray. The yeasts were not adversely affected when treated fruits were stored in a controlled atmosphere consisting of 1% oxygen and 99% nitrogen. In a commercial trial, the most effective treatments for control of blue mold of pear were a combination of C. laurentii and C. infirmo-miniatus (91% control) and the commercially recommended high rate (528 mu g/ml) of thiabendazole (88% control). In the commercial apple trial, the most effective treatments for blue mold were C. infirmo-miniatus combined with 264 mu g/ml thiabendazole (91% control), C. infirmominiatus combined with C. laurentii (84% control), and thiabendazole alone at 528 mu g/ml (79% control). The combination of C. laurentii with 264 mu g/ml of thiabendazole was significantly more effective for control of blue mold on pear than thiabendazole at 528 mu g/ml whenever any thiabendazole-resistant spores were present in the inoculum. (C) 1997 Academic Press.
引用
收藏
页码:199 / 206
页数:8
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