plum tree branches infected? - Knowledgebase Question

Brooklyn, Ne
Question by annieconyers
May 8, 2010
where can i take a piece of a plum tree to diagnose the hundreds of tiny balls that are on the branches

Answer from NGA
May 8, 2010


You can take a sample to your local cooperative extension office (Cornell Cooperative Extension, Eisenhower Park, East Meadow, NY 11554 phone (516) 228-0426) but I'm willing to bet the little balls are scale insects. If you squish them a fluid will come out. Scale insects firmly attach themselves to the bark and stems of trees and shrubs and feed by sucking out the fluid. They can be controlled with a dormant horticultural oil spray. It will suffocate the scales and they will remain until they weather away but at least they won't be feeding on your tree. The oil spray needs to be applied when the tree is dormant because the oil will kill the leaves. Look in the garden section for fruit tree dormant oil sprays and apply according to label directions. Best wishes with your plum tree.

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