Triệu chứng A large number of outgrowths (the so-called galls) appear on the leaves. Leaf margins may thicken, depending on the gall mite species. The excessive growth of hairs produces a velvety fur grows on the underside of the leaves. The colors of the galls can range from yellow to
Gall Mite
Nhện
Triệu chứng
A large number of outgrowths (the so-called galls) appear on the leaves. Leaf margins may thicken, depending on the gall mite species. The excessive growth of hairs produces a velvety fur grows on the underside of the leaves. The colors of the galls can range from yellow to red. Shoots appear stunted and buds may enlarge. Feeding of the mites results in the development of hard raised structures on the leaf surface. Trees may feature a proliferation of shoots which appears like “witches’ brooms”. A bronzening of leaves is also possible.
