|*These beetles are often vectors of disease organisms, e.g. black stain root disease.|
|Hylastes nigrinus||Hosts: Conifers||Damage:Adults feed on fine roots
of large, dead trees, and on roots of small weakened trees, occasionally
killing trees through girdling. Eggs are laid on roots.
|Hylurgops porosus||Hosts: Conifers||Damage: Common throughout the west. Breeds in lower bole and root collar.|
|Hylurgops subcostulatus||Hosts: Conifers||Damage: Attacks pines throughout
the west. Some species called "sour sap beetles", due to their habit of
breeding under the bark of wet, fermenting conifers, e.g. roots or tree
boles in contact with the ground.
|Fir root beetle,||Hosts: Abies spp.||Damage: Breeds in lower bole and root collar of Abies spp. Can cause mortality when it occurs with P. sericeus. Often associated with Armillaria ostoyae.|
root collar weevil,
|Hosts: Pine and spruce||Damage: Occurs throughout Canada.
Very common around Prince George. Larvae feed at the root collar and on
roots on pines and spruce, causing characteristic black, crusty pitch masses
in the soil. When scraped these turn white. Mortality is rare, but importance
may increase with increased plantations. Possibly associated with root
disease, e.g., tomentosus
root disease. Adults are flightless. A similar species, Hylobius
pinicola, is less common, and has well developed hind wings, and a
more northern distribution in the west. Other species of Hylobius
(particularly H. congener and H. pales) are important pests
of regenerating conifers in eastern and central North America.
|Pissodes schwarzi||Hosts: Pine and spruce||Damage: Throughout the west. Breeds
in root collar and roots of weakened immature pine and spruce. Very similar
in appearance to P. terminalis.
Rough strawberry root weevil,
Black vine weevil,
|Hosts: Hardwoods, conifers and ornamental plants||Damage: Flightless, parthenogenetic
weevils with short snouts. The larvae of all three species are damaging
in nurseries, but also in horticultural and agricultural crops. Larvae
feed initially on fine roots, and later on larger roots and the root collar.
See also Seedling Insects
|*Tenlined June beetle,||Hosts: Conifers||Damage: The larvae, known as white
grubs, can cause extensive damage to young plants. Can be particularly
numerous in grassy areas. The larvae of other scarab beetles may also damage
roots of seedlings.
See also Seedling Insects
|Homoptera||These insects have sucking mouth parts. They feed by sucking the juices from plant cells.|
|Cicadas||Hosts: Conifers||Damage: Nymphs feed on roots of plants.|
|Root aphids (many species)||Hosts: Conifers or hardwoods||Damage: All life stages feed on roots.|