I have a plum tree which is producing fruit for the first time. But all the small plums have sores that are probably from plum curculio. I think I should probably pick all those plums and dispose of them to keep the larvae from maturing and spreading in my yard. But what to do the rest of the year and next spring to keep the infestation from happening again? I had a plum tree many years ago that was killed by borers in the trunk of the tree and the insects I saw on the trunk looked like mature plum curculio insects. Don't want that to happen again. Are there effective ways to deal with this pest without chemical sprays or are sprays needed and can be used without hurting too many beneficial insects.