Walnut: European fruit lecanium categories: Tree Fruits Walnut Walnut Insects revision date: 2023-04-04 12:00 Lecanium scales on twigPhoto by: R.S. Byther Biology The European fruit lecanium is a shiny brown scale insect found on twigs. Adults are 1⁄8″ to 1⁄4″ in diameter and roughly turtle-shaped. They may have light markings or appear somewhat waxy. Crawlers […]
Walnut: Walnut aphid categories: Tree Fruits Walnut Walnut Insects revision date: 2023-04-04 12:00 Green peach aphid closeupPhoto by: Unknown Biology Walnut aphids are small, pale yellow, pear-shaped insects. They are typically found on the undersides of leaves. A second aphid species common on walnuts is the dusky-veined aphid, a grayish aphid found on upper leaf […]
Walnut: Walnut blister mite categories: Tree Fruits Walnut Walnut Insects revision date: 2022-12-05 12:00 Walnut blister mite damagePhoto by: R.S. Byther Biology The walnut blister mite is an eriophyid mite. These tiny, whitish, sausage-shaped mites cause raised green to yellowish blisters on the upper leaf surfaces. Beneath the blister, on the underside of the leaf, […]
Walnut: Walnut husk fly categories: Tree Fruits Walnut Walnut Insects revision date: 2023-04-04 12:00 Walnut husk fly damagePhoto by: A.L. Antonelli Biology Adult walnut husk flies are slightly smaller than a house fly. They are brown with a yellow mark on the back, and the otherwise clear wings are marked with dark bands. Females lay […]
Walnut: Walnut twig beetle categories: Tree Fruits Walnut Walnut Insects revision date: 2022-12-05 12:00 Walnut twig beetle adultPhoto by: S. Valley, ODA Biology The walnut twig beetle (WTB) is a small bark-boring beetle (Pityophthorus juglandis) believed to be native to the southwestern US. Not a great deal is known about the beetle’s life cycle, but […]