There is no such thing as a plum that a curculio will not puncture if it has a mind to. At times a tree may be neglected because the insect has found enough fruit elsewhere in which to deposit its eggs, or it may have deposited eggs that did not hatch - for even beetle's eggs, like any other, are "addled" sometimes. In the latter case the marks are left but the plum does not rot finally as when the egg gives up its " worm." As for the Chickasaw varieties being " proof," the Editor has seen wild trees in North Carolina as badly punctured as any in a cultivated state.