Pine: Coneworms Categories: Conifers Ornamentals Pine Pine Insects Last review date: 2025-10-14 02:51 Pine coneworm damage Photo by: L.J. du Toit Biology Coneworms attack trees by boring into green cones. They also may bore into shoot tips or stems, especially around wounds. Tip dieback may result from coneworm feeding. Injured twigs often can be distinguished […]
Pine: Eriophyid mites Categories: Conifers Ornamentals Pine Pine Insects Last review date: 2025-11-13 03:19 Pine eriophyid mite damage Photo by: R.S. Byther Biology Eriophyid mites are tiny, wormlike, whitish or tan mites which feed under bud scales or in the needle sheaths, often between the needle bases. Symptoms of eriophyid mite infestations include yellowing, distortion, […]
Pine: European pine shoot moth Categories: Conifers Ornamentals Pine Pine Insects Last review date: 2025-07-31 02:43 European pine shoot moth larva Photo by: E.P. Breakey Biology The larvae of the European pine shoot moth feed on tips of branches, boring first into needles or bud bases, then into the shoots. Infested tips are covered with […]
Pine: Mountain pine beetle Categories: Conifers Ornamentals Pine Pine Insects Last review date: 2025-07-31 02:44 Bark beetle larval galleries Photo by: A.L. Antonelli Biology The mountain pine beetle attacks pine trees (trunks and branches) 4″-5″ in diameter or larger. The adults and larvae mine the bark, weakening and girdling trees. Heavily infested trees may decline […]
Pine: Pandora moth Categories: Conifers Ornamentals Pine Pine Insects Last review date: 2025-07-31 02:44 Pandora moth adult Photo by: Unknown Biology Pandora moth larvae are brownish- to yellowish-green, spiny, and about one inch long at maturity. The larvae feed on the needles of pines, especially ponderosa, Jeffrey, and lodgepole. The stubs of eaten needles remain […]
Pine: Pine aphid Categories: Conifers Ornamentals Pine Pine Insects Last review date: 2025-10-14 02:51 Woolly pine aphid Photo by: R. Portman Biology Pine aphids are long-legged dark green or brown aphids covered with a white, woolly material. They are found in colonies on the needles. The aphids produce large amounts of honeydew (a sweet, sticky […]
Pine: Pine bark adelgid Categories: Conifers Ornamentals Pine Pine Insects Last review date: 2025-10-15 12:21 Pine bark adelgid Photo by: A.L. Antonelli Biology Pine bark adelgids form woolly or cottony white masses on the trunk, branches, or twigs. Heavy infestations can look like snow on the trunks of trees. Seedling and young trees may have […]
Pine: Pine butterfly Categories: Conifers Ornamentals Pine Pine Insects Last review date: 2025-07-31 02:48 Pine butterfly Photo by: Unknown Biology The larva of the pine butterfly is a dark green caterpillar with white stripes on the sides and a black head. The caterpillars feed on the needles, hatching out when new needles begin to appear. […]
Pine: Pine needle scale Categories: Conifers Ornamentals Pine Pine Insects Last review date: 2025-07-31 02:49 Pine needle scale Photo by: K. Grey Biology Pine needle scales are elongate, pure white scales which feed on the needles. Heavily infested trees may appear “flocked”. Infested needles turn yellow, then brown. Twigs and branches may be killed. Repeated […]
Pine: Pine needle sheathminer (Pine sheath miner) Categories: Conifers Ornamentals Pine Pine Insects Last review date: 2025-07-31 02:50 Pine sheath miner Photo by: R.S. Byther Biology Pine needle sheathminers are orange to tan larvae that feed on the needles. Young larvae mine inside needles, while older larvae feed at the base of needles inside the […]
Pine: Sequoia pitch moth Categories: Conifers Ornamentals Pine Pine Insects Last review date: 2025-07-31 02:52 Sequoia pitch moth Photo by: S.J. Collman Biology The larvae of the sequoia pitch moth feed by boring into branches or trunks. At the point where the larva enters the wood, small to large masses of white to pinkish pitch […]
Pine: Spider mites Categories: Conifers Ornamentals Pine Pine Insects Last review date: 2025-07-31 02:53 Spider mites under microscope Photo by: L.K. Tanigoshi Biology Spruce spider mites feed on older needles, causing yellowish to gray stippling (tiny spots) and needle chlorosis or yellowing. Fine webbing is usually present on infested needles and twigs. The mites are […]
Pine: White pine weevil Categories: Conifers Ornamentals Pine Pine Insects Last review date: 2025-07-31 02:54 White pine weevil damage Photo by: A.L. Antonelli Biology White pine weevils are brown beetles with light blotches on the highly curved back. Adults grow to about 1⁄4″ long and feed on shoots and needles of pines and spruces. The […]
Pine: Armillaria root rot Categories: Conifers Ornamentals Pine Pine Diseases Last review date: 2025-07-31 02:57 White fungal mat of Armillaria root rot infecting trunk Photo by: C.R. Foss Biology Armillaria root rot is a fungal disease transmitted between plants by root contact or through infected soil. Armillaria is often found in newly cleared soils or […]
Pine: Dwarf mistletoe Categories: Conifers Ornamentals Pine Pine Diseases Last review date: 2025-07-31 03:08 Dwarf mistletoe in conifer Photo by: R.S. Byther Biology Dwarf mistletoe is a parasitic plant that grows on the branches of a host tree. It is yellow-green, olive-green, or somewhat orange in color and grows in clusters to about four inches […]
Pine: Elytroderma needle cast Categories: Conifers Ornamentals Pine Pine Diseases Last review date: 2025-07-31 03:09 Elytroderma needle cast Photo by: R.S. Byther Biology Trees infected with Elytroderma needle cast often display clusters or flags of red-brown needles in the spring. The diseased twigs turn up at the tip. The bases of affected needles often remain […]
Pine: Lophodermella needle cast Categories: Conifers Ornamentals Pine Pine Diseases Last review date: 2025-07-31 03:11 Lophodermella needle cast Photo by: R.S. Byther Biology Lophodermella needle cast is a fungal disease that infects current-season needles, but symptoms are not found until the following spring. Infected needles turn reddish-brown and later become yellow or straw-colored. Shallow dimples […]
Pine: Lophodermium needle cast Categories: Conifers Ornamentals Pine Pine Diseases Last review date: 2025-07-31 03:27 Pine Lophodermium needle cast Photo by: R.S. Byther Biology Lophodermium needle cast is a fungal disease infecting the needles of pines. There are 19 Lophodermium species in the Pacific Northwest. One species of concern, L. seditiosum, infects current-season needles, which are […]
Pine: Phytophthora root rot Categories: Conifers Ornamentals Pine Pine Diseases Last review date: 2025-07-31 03:30 Phytophthora root rot damage to trunk Photo by: R.S. Byther Biology Phytophthora root rot is usually a problem only in areas with poor drainage or where flooding occurs. The fungus attacks the roots, which rot and die. The infection moves […]
Pine: Western gall rust Categories: Conifers Ornamentals Pine Pine Diseases Last review date: 2025-08-16 12:25 Western gall rust Photo by: R.S. Byther Biology Western gall rust affects primarily two- and three-needle pines, including shore, lodgepole, mugo, Scotch, Austrian, and ponderosa pines. This fungal disease causes small to large round or pear-shaped galls on infected twigs, […]