Biology and Control of the Mealy-Oak Gall    (View PDF)

David L. Morgan and Gordon W. Frankie

Abstract: Galls are commonly found on urban trees. Induced by oviposition of insects and other arthropods, galls develop from woody tree tissues, forming shelters for developing larvae. Few galls are physiologically harmful to the tree. Some, like the mealy-oak galls on live oak, are not only harmless but may harbor beneficial arthropods long after the gall-maker has departed. Because chemicals will not penetrate the gall, and the activities of the gall-formers are extended over time, the use of chemical pesticides to control gall-making is unreliable. The preferred use of resistant trees is discussed.

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https://doi.org/10.48044/jauf.1982.051