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Mycopathologia et mycologia applicata

, Volume 50, Issue 3, pp 257–260 | Cite as

Soil temperatures and inoculation techniques affect emergence and reisolation of sclerotinia Sclerotiorum from soybean

  • J. F. Nicholson
  • O. D. Dhingra
  • J. B. Sinclair
Article

Abstract

Emergence of “Amsoy” soybean (Glycine max) seed inoculated withSclerotinia sclerotiorum was significantly reduced below noninoculated seed at soil temperatures of 25, 30 and 35 °C, but not at 20 °C.S. sclerotiorum was readily·reisolated from wound-inoculated stems of seedlings and nearly mature plants above the point of inoculation below to the crown area, but not from roots. The fungus was recovered from stems but not roots of seedlings grown in sterile soil for 15 days before infestation of the soil surface with a suspension of mycelium and sclerotia and assayed at 15 days after soil infestation. When compared to healthy, seed infected withS. sclerotiorum were characterized by appearing flattened.

Keywords

Glycine Soil Surface Soil Temperature Mature Plant Sterile Soil 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Chamberlain, D. W. (1951) Sclerotinia stem rot of soybeans.Plant Dis. Reptr. 35:490–491.Google Scholar
  2. 2.
    Hildebrand, A. A. (1948) Soybean diseases in Ontario.Soybean Digest. 10:16–17.Google Scholar
  3. 3.
    Hine, R. B. &Wheeler, J. E. (1970) The occurrence of some previously unreported diseases in Arizona.Plant Dis. Reptr. 54:179–180.Google Scholar
  4. 4.
    Nicholson, J. F., Dhingra, O. D. &Sinclair, J. B. (1972) Internally seedborneSclerotinia sclerotiorum andPhomopsis sp. and their effects on soybean seed quality.Phytopathology 62: in press.Google Scholar

Copyright information

© Dr. W. Junk B.V. 1973

Authors and Affiliations

  • J. F. Nicholson
  • O. D. Dhingra
  • J. B. Sinclair
    • 1
  1. 1.Department of Plant PathologyUniversity of IllinoisUrbana

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