Phytopathology (1996) 86, p. S33 (Smilanick et al.)
J.L. Smilanick, T. Gouin-Behe, D.A. Margosan and C.T. Bull (1996)
Pathogenicity on citrus of Pseudomonas syringae strains that control postharvest green mold of citrus
Phytopathology 86 (11 suppl.), S33-S33
Abstract: Pseudomonas syringae strains (ESC-10 and ESC-11) used for postharvest biological control were compared to strain 485-10 that caused citrus black pit and blast. All strains reduced postharvest green mold of lemons, caused by Penicillium digitatum. Properties studied were tobacco hypersensitive reactions (HR), carbon utilization (Biolog GN), fatty acid profiles, and virulence. HR of ESC-10 and 0485-10 were positive, while that of ESC-11 was negative. Carbon utilization and fatty acid analysis of ESC-10 were closer to 485-10 than ESC-11. Shoots, leaves, and fruit of many cultivars ere inoculated. Only strain 485-10 caused lesions on shoots and leaves, and sunken lesions on citrus fruit. ESC-10 caused wounds on fruit to darken while water or ESC-11 did not. All strains made lesions on lime fruit; they were 2.8, 3.7, and 19.0 mm in dia. 16 d after application 108 cfu/ml of ESC-11, ESC-10, and 485-10, respectively. Virulence was quantified faster on lime fruit than other methods. ESC-11 and ESC-10 were a non-pathogen and a weakly virulent pathogen, respectively, and their use would not be a significant risk to citrus fruit or foliage.
Database assignments for author(s): Joseph L. Smilanick
Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
general biology - morphology - evolution
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Penicillium digitatum | Stored fruits/vegetables | |||
| Penicillium italicum | Stored fruits/vegetables | |||
| Pseudomonas syringae | Citrus (genus) | |||
| Pseudomonas syringae (antagonist) | Penicillium digitatum | Stored fruits/vegetables | ||
| Pseudomonas syringae (antagonist) | Penicillium italicum | Stored fruits/vegetables |
