By The American Phytopathological Society.
Links for Plant Microbiology:
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http://www.apsnet.org/edcenter/intropp/topics/Pages/PlantDiseaseDiagnosis.aspx
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By Colorado State University Extension, Fort Collins, Colorado, U.S.A..
http://www.ext.colostate.edu/mg/Gardennotes/331.html -
Familiarity with the way plant diseases are visually identified can help you diagnose problems. By Michigan State University Extension, East Lansing, Michigan, U.S.A..
http://msue.anr.msu.edu/news/signs_and_symptoms_of_plant_disease_is_it_fungal_viral_or_bacterial -
By Bob Augé, Department of Plant Sciences, Institute of Agriculture, University of Tennessee.
http://mycorrhiza.ag.utk.edu/ -
By the University of Florida, Gainesville, Florida, U.S.A..
https://edis.ifas.ufl.edu/topic_series_guidelines_to_identification_and_management_of_plant_disease_problems -
Plant pathology by Wikipedia, the free encyclopedia.
https://en.wikipedia.org/wiki/Plant_pathology