Home > III International Chestnut Congress > SENSITIVITY TO COPPER AND PHOSPHITE OF PHYTOPHTHORA SPECIES ASSOCIATED WITH INK DISEASES OF CHESTNUT

Articles

SENSITIVITY TO COPPER AND PHOSPHITE OF PHYTOPHTHORA SPECIES ASSOCIATED WITH INK DISEASES OF CHESTNUT

Article number

693_86

Pages

641 – 644

Language

English

Abstract

Phytophthora cinnamomi (23 isolates) and P. cambivora (3 isolates), isolated from chestnut showing ink disease symptoms or from soil near dead roots of chestnut trees were tested to copper and phosphite sensitivity.
Isolates were characterized using an amended agar assay.
EC₅₀ values (copper (or phosphite) concentration inhibiting mycelial growth of the pathogen by 50%) for each isolate were calculated by plotting probit percentage inhibition against log₁₀ active ingredient (a.i.) concentration.
EC50 values of copper ranged from 0.043×10^-3 to 2.025×10^-3 M in P. cinnamomi and 1.970×10^-3 to 4.603×10^-3 M in P. cambivora. EC₅₀ values of phosphite ranged from 2.99 to 172.39 µg ml^-1 in P. cinnamomi and 47.23 to 237.25 µg ml^-1 in P. cambivora. This study may contribute to access the potential utility of these a.i. for managing ink disease of chestnut and to use in the future as benchmark for baseline sensitivity.

Publication

III International Chestnut Congress

Authors

V. Coelho, S. Coutinho, M.E. Gouveia

Keywords

Phytophthora cinnamomi, P. cambivora, ink disease of chestnut

Full text

https://doi.org/10.17660/ActaHortic.2005.693.86

Online Articles (99)

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I. Linhares | A. Martins | O. Borges | C. Guedes | V. Sousa

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J. Gomes-Laranjo | J.P. Coutinho | J. Torres-Pereira | C. Ramos

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