ForesTree - A Guide to Tree Health

Pest and Disease Information

Jeffrey Pine
  • Pinus jeffreyi - Resistant to Texas Root Rot and Verticillium. Susceptible to Aphids, Jeffery Pine Beetle, California Flathead Borer and Beetle Borers, Oak Root Rot, Black Stain, Phytophthora Root Disease, Oak Root Rot, Mistletoe, Western Gall Rust, Needle Cast and Root Rot. Additional and expanded information listed below.

  • For further tree information:
       SelecTree (1052) | Silvics of North America
11 Records Found
Disease or Pest NameDescription of Disease or Pest

Black stain
Leptographium wageneri

Leptographium_wagneriDuring the early stages of black stain terminal growth is reduced and older needles become chlorotic. As the disease progresses older needles are shed prematurely, new needles are stunted and yellow, lat...

Dwarf Mistletoe
Arceuthobium campylopodum

Arceuthobium_campylopodumSmall, yellow, leafless parasitic flowering plants. Reduces tree vigor (yellowing foliage) and can lead to mortality.

Needle Cast
Elytroderma deformans

Elytroderma_deformansThis needle cast causes premature shedding of conifer needles and can cause witches' brooms. In severe infections it can lead to death, especially on Jeffrey Pine.

Phytophthora root disease
Phytophthora cinnamomi

Phytophthora_cinnamomiP. cinnamomi causes a general plant decline. Plants can be killed quickly causing them to retain dead leaves for a long period. Plant symptoms include leaf and twig dieback, bleeding through bark cracks,...

Pitch Canker
Fusarium circinatum

radiataPitch canker causes cankers/necrotic areas of bark on the main stem and lateral branches of affected trees. Pitch may stream from cankers. The cankers cause top kill and branch dieback. Flagging of branch...

Western Gall Rust
Endocronartium. harknessii

Endocronartium_harknessiiWestern gall rust forms globose to fusiform galls form on the branches or trunk of infected trees. On large trees this results in a hip-canker. The fungus produces powdery yellow-orange spores on surface ...

Black pineleaf scale
Nuculaspis californica

Nuculaspis_californicaOutbreaks of black pineleaf scale are often associated with smog and dust. The insect feeds only on the needles and is yellowish-brown to black and broadly oval in outline. The injured needles turn yello...

California flatheaded borer
Melanophila californica

Melanophila_californicaThe California flatheaded attacks trees in rocky soil and fringe stands where soil moisture is limiting. It also attacks old and unhealthy trees. Healthy trees are not immune, but less susceptible. Adul...

Carpenter ant
Camponotus spp.

adultCarpenter ants tunnel in the wood of stumps, logs, and standing dead trees. They are black or black and red and are 7 to 15 mm long. They do not eat the wood, feeding mostly on other insects. They have ...

Jeffrey pine beetle
Dendroctonus jeffreyi

dendroctonus_jeffreyiThe Jeffrey pine beetle is the most destructive bark beetle on Jeffrey Pine, its only host. It often attacks trees weakened by fire, drought, dwarf mistletoe, rust, or smog, or trees that are mature and ...

Red turpentine beetle
Dendroctonus valens

Dendroctonus_valens_frassThe red turpentine beetle most often attacks trees are weakened by fire, drought, dwarf mistletoe, rust, or smog. It can attack freshly cut logs and stumps. Often attacks trees in campgrounds and around ...