tailieunhanh - Fungicides for Plant and Animal Diseases Part 9

Tham khảo tài liệu 'fungicides for plant and animal diseases part 9', khoa học tự nhiên, công nghệ sinh học phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Biological Control Agents for Suppression of Post-Harvest Diseases of Potatoes Strategies on Discovery and Development 151 Pseudomonas fluorescens S11 P 14 Pseudomonas sp. S22 T 04 and Enterobacter sp S11 P 08 also significantly reduced disease. Lesion size was greater on Russet Norkotah than Russet Burbank tubers and mm respectively but cultivar did not influence antagonist performance. 7. Co-cultivation of strains The next generation As reviewed above Pseudomonas fluorescens strains S11 P 12 P22 Y 05 and S22 T 04 and Enterobacter cloacae strain S11 T 07 have been documented as top strains to suppress four important storage potato maladies dry rot late blight pink rot and sprouting. These strains are known to differ from one another in their range of antibiotic production substrate utilization oxygen requirement and growth temperature optima. They are also known to differ from one another in ability to inhibit sprouting or suppress disease on various potato cultivars and when incited by various pathogens. The variety of characteristics possessed by the individuals suggests that the successful strain mixtures are likely to be more resilient and more apt to provide individuals amenable to colonize potato wounds despite the variety of environments and pathogen strains encountered. Indeed our previous experimental results have shown that certain strain pairs applied in combination allow greater dry rot suppression than do individual strains Schisler et al. 1997 . In subsequent laboratory and field trials we observed that formulations containing multiple strains of our dry rot antagonists performed more consistently than individual strains did when subjected to 32 storage environments varying in potato cultivar harvest year potato washing procedure microflora exposure temperature and storage time Slininger et al. 2001 . Successful biocontrol strain mixtures often contained both Enterobacter cloacae and Pseudomonas fluorescens strains. Several other research .

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