Nothing I have read seems to believe so. You should be alright as long as you keep your compost balanced with organic materials.
OK thanks. I have 3 trees in my yard & someone told me I shouldn't composed them. I mix organic matter in with them so I guess I should be fine. Thanks again!
Pecan leaves from trees growing in acidic soil may tend to be slightly acidic, just as leaves from trees from alkaline soils may tend the other way. In either case, the amounts are negligible and should have no impact on a balanced compost, as Dee says.
Pecan leaves are no more acidic than most other hardwood leaves. They are a great source of minerals as well.