Pine: Coneworms categories: Ornamentals Pine Pine Insects revision date: 2023-02-07 12:00 Pine coneworm damagePhoto 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 by the presence […]
Pine: Eriophyid mites categories: Conifers Ornamentals Pine Pine Insects revision date: 2023-02-07 12:00 Pine eriophyid mite damagePhoto 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, and stunting […]
Pine: European pine shoot moth categories: Conifers Ornamentals Pine Pine Insects revision date: 2023-04-04 12:00 European pine shoot moth larvaPhoto 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 pitch-covered webbing, […]
Pine: Mountain pine beetle categories: Conifers Ornamentals Pine Pine Insects revision date: 2023-02-07 12:00 Bark beetle larval galleriesPhoto 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 or die. […]
Pine: Pandora moth categories: Conifers Ornamentals Pine Pine Insects revision date: 2023-02-07 12:00 Pandora moth adultPhoto 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 on the […]
Pine: Pine aphid categories: Conifers Pine Pine Insects revision date: 2023-04-04 12:00 Woolly pine aphidPhoto 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 material) which is […]
Pine: Pine bark adelgid categories: Conifers Ornamentals Pine Pine Insects revision date: 2023-02-07 12:00 Pine bark adelgidPhoto 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 adelgids at […]
Pine: Pine butterfly categories: Conifers Ornamentals Pine Pine Insects revision date: 2023-04-12 12:00 Pine butterflyPhoto 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. Young larvae […]
Pine: Pine needle scale categories: Conifers Ornamentals Pine Pine Insects revision date: 2023-02-07 12:00 Pine needle scalePhoto 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 infestations may […]
Pine: Pine needle sheathminer (Pine sheath miner) categories: Conifers Ornamentals Pine Pine Insects revision date: 2023-02-07 12:00 Pine sheath minerPhoto 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 needle sheath. […]
Pine: Sequoia pitch moth categories: Conifers Ornamentals Pine Pine Insects revision date: 2023-02-07 12:00 Sequoia pitch mothPhoto 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 accumulate. The […]
Pine: Spider mites categories: Conifers Ornamentals Pine Pine Insects revision date: 2023-02-09 12:00 Spider mites under microscopePhoto 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 tiny and […]
Pine: White pine weevil categories: Conifers Ornamentals Pine Pine Insects revision date: 2023-02-07 12:00 White pine weevil damagePhoto 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 larvae feed […]
Pine: Armillaria root rot categories: Conifers Ornamentals Pine Pine Diseases revision date: 2023-02-07 12:00 White fungal mat of Armillaria root rot infecting trunkPhoto 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 soils which […]
Pine: Dwarf mistletoe categories: Conifers Ornamentals Pine Pine Diseases revision date: 2023-02-07 12:00 Dwarf mistletoe in coniferPhoto 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 high. The […]
Pine: Elytroderma needle cast categories: Conifers Ornamentals Pine Pine Diseases revision date: 2023-02-07 12:00 Elytroderma needle castPhoto 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 green. In […]
Pine: Lophodermella needle cast categories: Conifers Ornamentals Pine Pine Diseases revision date: 2023-02-07 12:00 Lophodermella needle castPhoto by: R.S. Byther Biology This fungal disease 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 or depressions can be found on all […]
Pine: Lophodermium needle cast categories: Conifers Ornamentals Pine Pine Diseases revision date: 2023-02-07 12:00 Pine Lophodermium needle castPhoto 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 killed by […]
Pine: Phytophthora root rot categories: Conifers Ornamentals Pine Pine Diseases revision date: 2023-02-07 12:00 Phytophthora root rot damage to trunkPhoto 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 up into […]
Pine: Western gall rust categories: Conifers Ornamentals Pine Pine Diseases revision date: 2023-02-07 12:00 Western gall rustPhoto 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, branches, or […]