Hemlock: Coneworms categories: Conifers Hemlock Hemlock Insects Ornamentals revision date: 2023-01-31 12:00 Coneworm larvae on pinePhoto by: K. Grey Biology Coneworms attack trees by boring into green cones, shoot tips, stems, and trunks. They are particularly attracted to wound sites. Coneworm feeding results in the dieback of affected twigs. Injured twigs often can be distinguished […]
Hemlock: Hemlock scale categories: Conifers Hemlock Hemlock Insects Ornamentals revision date: 2024-04-08 11:46 Hemlock scalePhoto by: R. Van Denburgh Biology Hemlock scales feed on the needles of Eastern hemlock (Tsuga canadensis) and spruces (especially Colorado blue). Adult scales are round to oval, dark gray or black in color, and about 2 mm (1⁄10″) in diameter. […]
Hemlock: Hemlock woolly adelgid categories: Conifers Hemlock Hemlock Insects Ornamentals revision date: 2023-01-31 12:00 Hemlock woolly adelgidPhoto by: R.S. Byther Biology Hemlock adelgids are aphid-like insects. They appear as white, woolly tufts on the bark and needles. Trees with severe infestations may be stressed, predisposing them to other insect and disease problems. Needles drop prematurely, […]
Hemlock: Annosus root rot categories: Conifers Hemlock Hemlock Diseases Ornamentals revision date: 2023-01-31 12:00 Annosus root rot decayed wood with black flecksPhoto by: B.M. Johnson Biology Annosus root rot is caused by the fungus Heterobasidion annosum. This native soil pathogen is often in large old tree stumps. It can live several decades as a saprophyte […]
Hemlock: Phytophthora root rot categories: Conifers Hemlock Hemlock Diseases Ornamentals revision date: 2023-01-31 12:00 Dieback on creeping hemlock due to Phytophthora root rotPhoto 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. Phytophthora root […]