Fruit tree leaves
Thanks for writing. If your compost heated up properly as the leaves decomposed, it should kill most insect eggs or larvae and weed seeds.
For leaf miners in particular, you should be safe as the larvae overwinter in the soil, not in the foliage. And many leaf miner species prefer to mine a certain plant --- so if they bothered your apple trees, for example, that same species will ignore delphiniums or daisies.
---Justin, Senior Garden Editor, BHG.com
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