Filbert: Bacterial blight Categories: Filbert Filbert Diseases Tree Fruits Last review date: 2026-08-28 02:29 Last edit date: Canker on twig caused by filbert bacterial blight Photo by: Unknown Biology Bacterial blight of filbert may attack buds, leaves, twigs, branches, and the trunk. Infected buds may be killed before leafing out. Leaves initially develop pale green, […]
Filbert: Eastern filbert blight Categories: Filbert Filbert Diseases Tree Fruits Last review date: 2026-08-28 02:29 Last edit date: Eastern filbert blight pustules on twig Photo by: R.S. Byther Biology Eastern filbert blightis a fungal disease found on both cultivated and wild filberts. The disease typically infects via wounds caused by mechanical or insect damage. Buds […]
Filbert: Powdery mildew Categories: Filbert Filbert Diseases Tree Fruits Last review date: 2026-05-14 08:44 Last edit date: Powdery mildew fungal structures on filbert leaf Photo by: R.S. Byther Biology Powdery mildew is a fungal disease found on leaves and succulent shoots of hazelnut. A characteristic powdery white growth occrs on the underside of leaves and […]
Filbert: Apple mealybug Categories: Filbert Filbert Insects Tree Fruits Last review date: 2026-05-05 11:47 Last edit date: Apple mealybugs and nests on twigs Photo by: E.H. Beers Biology Apple mealybugs are gray, flat, scale-like insects found on trees during winter and spring. They are typically found in cottony clusters on twigs and the underside of […]
Filbert: Brown marmorated stink bug Categories: Filbert Filbert Insects Tree Fruits Last review date: 2026-08-29 08:17 Last edit date: Brown marmorated stink bug adult Photo by: M. Bush Biology The brown marmorated stink bug (BMSB) is an introduced pest species from Asia that is spreading quickly across the United States. Nymphs and adults feed on […]
Filbert: Filbert aphid Categories: Filbert Filbert Insects Tree Fruits Last review date: 2026-08-29 09:05 Last edit date: Aphid colony on leaf Photo by: A.L. Antonelli Biology Filbert aphids are small, yellowish-green, pear-shaped insects typically found on the leaves. Aphids are often found in colonies on the tender new growth. Heavy aphid feeding may result in […]
Filbert: Filbert bud mite Categories: Filbert Filbert Insects Tree Fruits Last review date: 2026-05-14 07:46 Last edit date: Swollen filbert bud from mite feeding Photo by: R.S. Byther Biology Filbert bud mites are tiny eriophyid mites which feed in the leaf and flower buds. The mites are yellowish and sausage-shaped and are difficult to see […]
Filbert: Filbert leafroller Categories: Filbert Filbert Insects Tree Fruits Last review date: 2026-05-14 07:53 Last edit date: Filbert leafroller larva causing damage on leaf Photo by: K. Grey Biology The filbert leafroller is a greenish caterpillar with a light to dark brown head. The caterpillars are about 3⁄4″ long at maturity. They feed inside webbed […]
Filbert: Filbertworm Categories: Filbert Filbert Insects Tree Fruits Last review date: 2026-05-14 07:59 Last edit date: Nut damaged by filbertworm larva Photo by: K. Grey Biology The filbertworm is the larval stage of a gray to reddish moth. The adult moth has copper- to gold-colored bands across the forewings and a wingspread of approximately 1⁄2″. […]
Filbert: Lecanium scale Categories: Filbert Filbert Insects Tree Fruits Last review date: 2026-08-29 09:11 Last edit date: Lecanium scales on twig Photo by: R.S. Byther Biology Lecanium scales are shiny brown insects found on twigs. Adults are 1/8″-1/4″ in diameter and roughly turtle-shaped. They may have light markings or appear somewhat waxy. Crawlers (immature scales) […]