Insects Flashcards
5 insect forms, 3 wingless
All 5 forms of this species are female
Reproduce via parthenogenesis
Cone like galls on end of shoots
Spruce Gall Adelgid
IAG
Drought stressed birch
Dead branch or top extremeties
D shaped exit holes
Bronze Birch Borer and Birch Dieback
ISA
Large messy pitch mass on bole or larger branches
Old pitch masses remain on trees for many years
Larvae feeding underneath
Sequoia Pitch Moth
ISQ
Small pinholes in sapwood. Hole stained dark from ambrosia fungi
Ambrosia Beetle
Large piles of boring dust at the base of tree
Honeycomb-like chambers in affected wood
Don’t consume wood, just make home/nest in it
Carpenter Ants
Windthrow, felled trees, weakened trees
All species potential host
Snake-like larval galleries uner bark that end at an entrance to sapwood
Adult exit holes on outside of bole
Woodborers
Frass in bark crevices
Woodpecker activity
Larvae with 2 anal shields
Spruce Beetle
Dendroctonus rufipennis
IBS
Red terminal leader on Pl
Puncture holes
Pupae in pith
Lodgepole Pine Terminal Weevil
Pissodes terminalis
IWP
Hits young, vigorous trees, warm sites
Dead tops (2 years growth)
White Pine Weevil on Spruce
Pissodes strobi
IWS
J shaped main gallery - adult, larvae branch off from there
Pitch tubes in lower bole
Frass at base of tree
Mountain Pine Beetle
Dendroctonus ponderosae
IBM
Attracted by aggregation phenomones
Frass/boring dust at base of tree
Pitch tubes on upper bole
Western Balsam Bark Beetle
Dryocoetes confusus
IBB
Red frass at base of tree and on bark
J shaped main gallery with many galleries extending laterally
Veiled polypore
Douglas-fir Beetle
Dendroctonus pseudotsugae
IBD
Reddish frass at base of tree and on bark
Pitch tubes mid-bole
Serpentine gallery pattern
Woodpecker common as soon as larvae are large
Western Pine Beetle
Dendroctonus brevicomis
IBW
Weakened, standing live Py (Pl), prefers larger, older Py, will attack Py stumps
Largest of dendroctonus spp
Very large frass filled pitch tubes at base of tree
Large, wide gallery patterns
Red Turpentine Beetle
Dendroctonus valens
IBT
Needle death starting from the tips, scorched appearance
Chewed needles
Small moth, 10mm wingspan
Defioliates tree, reduces growth
Larch Casebearer
IDC
Transmitted by adults flying to new host
Light-coloured frass at base of tree and on bark
Pitch “stream” in upper bole
Lateral main gallery pattern “engraved” into sapwood
Also associated with veiled polypore
Hits true firs (primarily Bg). Fd and Sx also possible hosts
Pole sized to mature
Slash and windthrow
Normally on trees that have been weakened by root disease and/or other agents
Fir Engraver Beetle
Scolytus ventralis
