Knowledgebase
Infected plum tree #878298
Asked July 22, 2024, 3:15 PM EDT
Delaware County Pennsylvania
Expert Response
https://chemung.cce.cornell.edu/resources/black-knot-disease-of-cherry-and-plum
https://extension.umaine.edu/ipm/ipddl/publications/5091e/
https://ohioline.osu.edu/factsheet/plpath-fru-31