Summary
The relative resistance to late blight in the field of potato varieties Pontiac, Sebago, and Ostbote was asssociated, in most greenhouse tests, with numbers of infections, size of lesions, and abundance of sporulation. This was not true of the variety Cobbler which in the greenhouse appeared to be resistant, although actually the most susceptible of the four in the field.
Abundance of sporulation was not correlated with size of lesions.
Plants of Pontiac, Sebago, and Cobbler grown in the field and transplanted to pots in the greenhouse were much more susceptible to blight than those planted at the same time but grown continuously in the greenhouse. The field-grown plants had more and larger lesions under standard conditions of inoculation and incubation.
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Literature Cited
Black, W., C. Mastenbroek, W. R. Mills, and L. C. Peterson. 1953. A proposal for an international nomenclature of races ofP. infestans and of genes controlling immunity of Solanum demissum derivatives. Euphytica 2: 173–178.…
Deshmukh, M. J., and H. W. Howard. 1956. Field resistance to potato blight (Phytophthora infestans) Nature 177: 194–195.
Guzman, J., H. D. Thurston, and L. E. Heidrick 1960. Naturaleza de la resistencia parcial de tres clones de papa allPhytophthora infestans. Agricultura Tropical 16: 88–99.
Kammerman, N. 1951. Undersökninger rörande Potatisbladmöglet,Phytophthora infestans (Mont.) de Bary II. Sanbaneet mellan Potatisbladsaftens peroxidasaktivitet och Phytophthora resisten. Medd. Vaxskyddsanst, Stockholm 58, 32p. Rev. Appl. Mycol. 31: 78.
Muller, K. O. and J. C. Haigh. 1953. Nature of ◂field resistance” of the potato toPhytophthora infestans deBary. nature 171: 781–783.
Niederhauser, J. S., J. Cervantes, and L. Servin. 1954. Late Blight in Mexico and its implications. Phytopathology 44: 406–408.
Schaper, P. 1951 Die Bedeutung der Inkubationzeit für die Zuchtung krautfäuleresistenter Kartoffelsorten. Z. Pflanzenzucht. 30: 292–299. Rev. Appl. Mycol. 31: 139.
Thurston, H. D. 1957. The culture ofPhytophtora infestans Phytopathology 47: 186.
Van der Zaag, D. E. 1956. Overwintering en epidemiologie vanPhytophtora infestans, tevens enige nieuwe bestrijdingsmogelijkheden. Tijdschr. PIZiekt. 62: 89–156. Rev. Apl. Mycol. 36: 118–120.
Additional information
Paper No. 4739, Scientific Journal Series, Minnesota Agricultural Station, St. Paul 1, Minnesota. This work was supported, in part by Regional Research Funds from the NC-35 Technical Committee.
Formerly Department of Plant Pathology and Botany, Institute of Agriculture, University of Minnesota, St. Paul. Now Department of Plant Pathology, University of Idaho Branch Experiment Station, Aberdeen, Idaho.
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Knutson, K.W. Studies on the nature of field resistance of the potato to late blight. American Potato Journal 39, 152–161 (1962). https://doi.org/10.1007/BF02867139
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DOI: https://doi.org/10.1007/BF02867139