black knot

Controlling Black Knot – #AskUConnExtension

What is Black Knot? Black Knot, is a disease commonly found on plums and Prunus┬áspecies. The fungus causes the plant to produce unusual galls which eventually grow to girdle twigs and branches, restricting water supply and killing portions of the canopy. It is spread to other plants via wind and water. Control Manage the disease […]

Black Knot of Plum & Cherry: Prune Now!

By Joan Allen Originally published by the UConn Home & Garden Education Center Black knot of plum and cherry, caused by the fungus Apiosporina morbosa, may be overlooked during the growing season when the leaves are hiding the galls, but this time of year they are hard to miss, especially when they are as abundant […]