Apple Scab by Agriculture Victoria, Victoria State Department, The State of Victoria, Australia.
Links for What is Apple Scab Disease?:
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http://agriculture.vic.gov.au/agriculture/pests-diseases-and-weeds/plant-diseases/fruit-and-nuts/pome-fruit-diseases/apple-scab
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Apple Scab by The American Phytopathological Society, St. Paul, Minnesota, U.S.A..
https://www.apsnet.org/edcenter/disandpath/fungalasco/pdlessons/Pages/AppleScab.aspx -
Apple Scab by The Integrated Pest Management Program, Department of Extension, University of Connecticut, Storrs, Connecticut, U.S.A..
http://ipm.uconn.edu/documents/raw2/Apple%20Scab/Apple%20Scab.php?aid=251 -
Apple Scab by eXtension, an interactive learning environment delivering knowledge from land-grant universities across America.
https://articles.extension.org/pages/60346/apple-scab -
Scab of Apple by Ohioline, Ohio State University Extension, Columbus, Ohio, U.S.A..
https://ohioline.osu.edu/factsheet/plpath-fru-23 -
Apple Scab by The Ontario Ministry of Agriculture, Food and Rural Affairs, Guelph, Ontario, Canada.
http://www.omafra.gov.on.ca/english/crops/facts/apscab.htm -
Apple Disease - Apple Scab by PennState Extension, The Pennsylvania State University, University Park, Pennsylvania , U.S.A..
https://extension.psu.edu/apple-disease-apple-scab -
Venturia inaequalis - Apple Scab by Tom Volk's Fungi, University of Wisconsin-La Crosse, La Crosse, Wisconsin,U.S.A..
https://botit.botany.wisc.edu/toms_fungi/sep2002.html -
Apple Scab Fact Sheet by The Univeristy of New Hampshire Extension, Durham, New Hampshire, U.S.A..
https://extension.unh.edu/resource/apple-scab-fact-sheet -
Apple scab by Wikipedia, the free encyclopedia.
https://en.wikipedia.org/wiki/Apple_scab
