• Corpus ID: 73631385

Degrees of sensitivity to metalaxyl within the Pythium spp. pathogenic to wheat in the Pacific Northwest.

@article{Cook1985DegreesOS,
  title={Degrees of sensitivity to metalaxyl within the Pythium spp. pathogenic to wheat in the Pacific Northwest.},
  author={Robert J. Cook and Bing Zhang},
  journal={Plant Disease},
  year={1985},
  volume={69},
  pages={686-688}
}
sensitive species, including Phytophthora Cook, R. J., and Zhang, B.-X. 1985. Degrees of sensitivity to metalaxyl within the Pythium spp. infestans (10), Pseudoperonospora pathogenic to wheat in the Pacific Northwest. Plant Disease 69:686-688. cubensis (11), and Pythium aphanidermatum (13). In addition, resistance to A minimum of 20-25%, and in some cases more than 80%, of Pythium colonies selected at random metalaxyl has been induced to Phytophfrom soil-dilution plates of a Pythiumi-selective… 

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References

SHOWING 1-4 OF 4 REFERENCES

metalaxyl - resistantstrainsofPhytophthora 4 758 86 Induction of fungal resistance to metalaxyl by infestans in Dutch potato fields . Neth . J . Plant 5 628 86 ultraviolet irradiation

  • Phytopathology Pathol .
  • 1982

The role of Pythium in transfer of an agar block from a colony 4

  • 1971

account for response of wheat to root rot : A barrier to yield of Pacific Northwest CGA 48988 , a novel fungicide for the control of wheat

  • Wash . State Coll . Agric . Res . Bull
  • 1977