The answer to 'why is my tree pests' is that your tree may be infested with insects, fungi, or other pests that are damaging its health and growth. Common tree pests include aphids, borers, scale insects, mites, and fungal diseases like leaf scorch or canker. Signs of a pest problem include discolored or wilting leaves, holes in the bark, and overall decline in the tree's vigor.
In many cases, you can treat minor pest issues yourself by pruning affected branches, applying insecticidal sprays, or improving the tree's growing conditions. However, for severe or recurring infestations, it's best to consult a certified arborist or professional tree care service. They can diagnose the specific problem and recommend the most effective treatment to protect your tree.