Silver maples....I have three on my lot, planted by the builder 26 years ago. Here, Silver maples are considered "trash trees" because they grow quickly but die after 15-20 years. All three of mine are sickly (but big!) and a bore magnet. I'm constantly spraying something on them and picking up dropped branches. I've never understood their relation to sugar maples.
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paul, texas KD5IVP