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Journal
Phytopathology
Scopus
ISSN 0031-949X · American Phytopathological Society · 2 articles in the index
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Journal Article Full text
An Improved Grading System for Measuring Plant Diseases
Heretofore, in recording severity of plant diseases by grading, the grades have been assigned equal values in percentage. According to the Weber-Fechner law, the human eye distinguishes according to the logarithm of the light intensity. Hence, the grades should be based on equal ability to…
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Journal Article Full text
The Influence of Ectotrophic Mycorrhizal Fungi on the Resistance of Pine Roots to Pathogenic Infections. I. Antagonism of Mycorrhizal Fungi to Root Pathogenic Fungi and Soil Bacteria
Antagonism of ectotrophic mycorrhizal fungi to Phytophthora cinnamomi, other root pathogenic fungi, and soil bacteria was examined. In agar plate tests, Laccaria laccata, Lactarius deliciosus, Leucopaxillus cerealis var. piceina, Pisolithus tinctorius, and Suillus luteus inhibited growth of nearly…