5. Common lemon tree pests Citrus bugs, scale and aphids can affect the health of the lemon and its leaves. Seeing ants along the stems is a sign that the tree has pests. Aphids appear on new ...

One suggests that red leaves are a form of "sunscreen" for a tree, protecting it from sun damage. The other maintains that red leaves keep away insects that could harm the tree.

Calgary Yellow leaves signs of hot, dry conditions rather than 'early signs of fall': arborist City spokesperson says Calgary would need another few drought years before major impact to urban canopy ...