Hawthorn: Apple-and-thorn skeletonizer categories: Hawthorn Hawthorn Insects Ornamental trees Ornamentals revision date: 2023-12-02 09:17 Apple-and-thorn skeletonizer caterpillar feeding on leafPhoto 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 black spots and […]
Hawthorn: Hawthorn aphid categories: Hawthorn Hawthorn Insects Ornamental trees Ornamentals revision date: 2023-04-04 12:00 Green peach aphid closeupPhoto 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 and deformed. Feeding […]
Hawthorn: Pear slug categories: Hawthorn Hawthorn Insects Ornamental trees Ornamentals revision date: 2022-11-22 03:33 Pear slug and damaged leaf from feedingPhoto 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 amounts of slime. […]
Hawthorn: Scale insects categories: Hawthorn Insects Ornamental trees Ornamentals revision date: 2023-04-04 12:00 Lecanium scales on twigPhoto 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 on the […]
Hawthorn: Spider mites categories: Hawthorn Hawthorn Insects Ornamental trees Ornamentals revision date: 2022-11-22 02:43 Spider mites under microscopePhoto 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 feed on […]