Rake and dispose of fallen leaves to reduce the chance of infection in the following season. Fertilize trees in the spring and water during dry weather to maintain tree vigor. Since this disease is usually not a serious problem for the health of the trees, chemical controls are usually not necessary. This disease can be extremely severe on Lombardy poplar. A fermentation odor may be noticeable.
Branches die, and entire trees often die prematurely.
There are no known controls. Insect Problems Aphids. Several species of aphids occur on poplar. All aphid species can be controlled with imidacloprid applied as a systemic to be taken up by the roots. Non-gall forming species can also be controlled by spraying with acephate or insecticidal soap, which are among the compounds registered for use against this pest in Connecticut.