Black pineleaf scale
42 host plants
Last updated
Data Coverage 1 of 6 dimensions
Inspect pine needles closely for tiny black or dark brown scales clustered densely on surfaces, particularly lodgepole pine and western species. Heavy infestations make needles appear blackened or sooty. Look for scale populations building gradually over seasons, with damage more apparent on interior, lower canopy needles.
Prune and remove heavily infested branches; this is most practical control on landscape trees where chemical intervention is undesirable. Apply horticultural oil in March before new growth begins, coating thoroughly. If populations persist, repeat oil application in June during crawler stage when scales are mobile and vulnerable. Avoid broad-spectrum insecticides.
Quick Reference
Host Plants
42
Cultural Controls
- biological control Larvae of green lacewings and other insects are aggressive predators of scale.
- A number of parasitic wasps will attack scale insects.
- However, biological control does not necessarily prevent significant scale infestations.
- Management-cultural control Scale can be rubbed off plants by hand with a glove or toothbrush.
- Major infestations can be pruned off.
- Tanglefoot, \"stickem,\" or a similar adhesive can be applied around infestations of adult scales to catch the crawler stage....
Host Plants (42)
Pinus albicaulis Whitebark Pine, Scrub Pine, White Pine Pinus aristata Bristlecone Pine, Rocky Mountain Bristlecone Interior Bristlecone Pinus attenuata Knobcone Pine Pinus banksiana Jack Pine, Scrub Pine, Banksian Pine, Hudson Bay Pine Pinus bungeana Lacebark Pine, Whitebark Pine, Baipi Song Pinus canariensis Canary Island Pine Pinus cembra Swiss Stone Pine Pinus contorta Lodgepole Pine Pinus contorta var. contorta Shore Pine Pinus contorta var. latifolia Rocky Mountain Lodgepole Pine Pinus coulteri Coulter Pine, Bigcone Pine Pinus densiflora Japanese Red Pine Pinus edulis Pinyon Pine, Piñón Pine, Two-needle Pinyon Colorado Pinyon Pinus elliottii Slash Pine, Swamp Pine Pinus flexilis Limber Pine, Rocky Mountain White Pine Pinus halepensis Aleppo Pine, Jerusalem Pine Pinus heldreichii Bosnian Pine, Snakeskin Pine Pinus jeffreyi Jeffrey Pine, Western Yellow Pine, Bull Pine Pinus kwangtungensis Kwangtung Pine, Guangdong Pine Pinus lambertiana Sugar Pine Pinus leucodermis Bosnian Pine Pinus monophylla Singleleaf Pinon Pine, One-leaved Pine Pinus monticola Western White Pine Pinus mugo Mugo Pine Pinus mugo var. pumilio Mugo pine, Dwarf Mugo pine Pinus nigra Austrian Pine Pinus parviflora Japanese White Pine Pinus parvifola Pinus parvifola Pinus pinaster Maritime Pine, Cluster Pine, Turpentine Pine Pinus pinea Italian Stone Pine, Umbrella Pine Pinus ponderosa Ponderosa Pine, Western Yellow Pine Pinus pumila Japanese Stone Pine, Dwarf Siberian Pine Pinus radiata Monterey Pine Pinus resinosa Red Pine Pinus sabiniana Gray Pine, Foothill Pine Pinus strobiformis Southwestern White Pine, Mexican White Pine, Chihuahua White Pine Pinus strobus Eastern White Pine Pinus sylvestris Scots Pine, Scotch Pine Pinus thunbergii Japanese Black Pine Pinus virginiana Virginia Pine, Scrub Pine, Jersey Pine Pinus wallichiana Himalayan Pine, Bhutan Pine Pinus yunnanensis Yunnan Pine