Hello. Are Newport Plums and cistena plums susceptible to black knot fungus?

Asked March 16, 2017, 11:40 AM EDT

Hello. Are Newport Plums and cistena plums susceptible to black knot fungus?

Warren County Ohio

1 Response

Hello. Thank you for your question.

Here are a few articles on Black Knot. I highly recommend reading them.

http://extension.psu.edu/pests/plant-diseases/all-fact-sheets/black-knot-of-prunus

http://msue.anr.msu.edu/news/your_plum_trees_versus_black_knot

http://www.extension.umn.edu/garden/yard-garden/trees-shrubs/black-knot/

http://www.ct.gov/caes/lib/caes/documents/publications/fact_sheets/plant_pathology_and_ecology/black_knot_of_ornamental_plum_and_cherry_4-02-08r.pdf

Some list the susceptibility level of different varieties.

Purple leaf sand cherry (prunus cisterna) is less susceptible to black knot.

I also recommend asking your local Extension office (find your office by clicking on the link below) or a local reputable nursery for the variety that will grow well in your area.

Hope this helps!