บทคัดย่องานวิจัย

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Attempts at biological control of postharvest diseases of apple.

Gullino, M. L.; Aloi, C.; Palitto, M.; Benzi, D.; Garibaldi, A.;

Mededelingen van de Faculteit Landbouwwetenschappen, Rijksuniversiteit Gent Year: 1991 Vol: 56 Issue: 2a Pages: 195-202 Ref: 7 ref.

1991

บทคัดย่อ

Attempts at biological control of postharvest diseases of apple.

Over 200 isolates of yeasts and bacteria were obtained from the surface of apples harvested from unsprayed orchards and tested for their in vitro antagonistic activity towards Botrytis cinerea and Penicillium expansum. In general, yeasts (at 106 cells/ml) showed higher activity than bacteria (108 cells/ml). Antagonistic activity was always higher against B. cinerea than P. expansum, although most antagonists active towards the former also showed some activity towards the latter. Two yeasts and 2 bacteria were the most effective antagonists, and were tested on artificially inoculated apple fruits. The yeasts were active at both 25 and 4 deg C, while the bacteria showed a reduced efficacy at the lower temp. A 20 h interval between treatment with the yeasts and inoculation with the pathogens was necessary to reduce rot. Suspending yeast cells in 1 or 2% CaCl2 significantly (P<0.05) increased control efficacy. This paper was presented at the 43rd International Symposium on Crop Protection held in Ghent, Belgium on 7 May 1991.