Willow Leaf Beetle
Willow leaf beetles commonly attack willow and poplar trees in Bucks and Montgomery areas. The adults are dark metallic black to greenish-blue and are visible in May. The eggs from these pests are oval, glossy, pale yellow and found on the undersides of leaves in May, June, and August. The small, black larvae chew notches out of the leaves, beginning in May and June. During heavy infestations these leaves can be completely devoured, leaving behind only the veins. There can be two to three generations of willow leaf beetles in one year. The adults beetles overwinter under loose bark or piles of leaves at the base of the tree.
Depending on the amount of infestation, the size of the host tree, and the time of year, there are foliar spray and soil injected pesticides, which provide acceptable control of this pest.
Contact Plant Health Solutions for proper diagnosis and to develop a treatment plan.