Hawthorn: Apple-and-thorn skeletonizer categories: Hawthorn Hawthorn Insects Ornamental trees Ornamentals last review date: 2026-05-15 11:29 Apple-and-thorn skeletonizer caterpillar feeding on leaf Photo by: A.L. Antonelli Biology The adult of the apple-and-thorn skeletonizer is a small dark-brown moth. It overwinters as an adult, laying eggs in the spring. The caterpillars are yellow green in color with […]
Hawthorn: Hawthorn aphid categories: Hawthorn Hawthorn Insects Ornamental trees Ornamentals last review date: 2026-05-15 08:29 Green peach aphid closeup Photo by: Unknown Biology Hawthorn aphids are yellow green to pinkish, soft-bodied insects typically found on the leaves in the spring. Aphid feeding causes young leaves to curl tightly and turn purplish. Older leaves are crinkled […]
Hawthorn: Pear slug categories: Hawthorn Hawthorn Insects Ornamental trees Ornamentals last review date: 2026-05-15 09:08 Pear slug and damaged leaf from feeding Photo by: R.D. Akre Biology Pear slugs, or pear sawflies, are insect larvae which resemble a small greenish or black slug. They are typically 1/4″ to 1/2″ long, tadpole shaped. and produce large […]
Hawthorn: Scale insects categories: Hawthorn Insects Ornamental trees Ornamentals last review date: 2026-05-18 07:06 Lecanium scales on twig Photo by: R.S. Byther Biology Several species of scales may be found on hawthorn. In general, scales are approximately 1/16″ to 1/8″ in diameter, dull or shiny, and grayish to dark in color. They are typically found […]
Hawthorn: Spider mites categories: Hawthorn Hawthorn Insects Ornamental trees Ornamentals last review date: 2026-05-18 07:12 Spider mites under microscope Photo by: L.K. Tanigoshi Biology Spider mites are tiny, eight-legged and variably colored from yellow or green to red or brown. When viewed through a hand lens, they appear as tiny moving dots. Spider mites typically […]