Balsam Wooly Adelgid Flashcards
Balsam Adelgid damage? What about susceptibility?
Grand fir the highest damage, Amabilis second, subalpine third.
Susceptibility is opposite, due to the elevation range. Adelgid usually introduced by ppl, and has been in Bg for longer.
Is it native?
Introduced from Europe
How does wooly Adelgid reproduce?***
Parthenogenesis *****
Girls girls girls
Char’s of feeding
Very long stylette with two grooves
One for injecting toxins from salivary gland, causing abnormal cell growth and increasing nutrient uptake.
Dispersal
L1 crawls up bark toward light where new bark is. (Also AIDS dispersal)
Wingless and sessile
Wind dispersal
Movement of logs and seedlings by humans
Reproduction
2-4 generations per year
OW as nymph
Signs and Symptims
Gout
White wooly tufts on bark
On Bg, Creates a silhouette with a flat top.
Damage
A killer
reduced increment
Deformity and top kill
Loss of B as preferred species
3 letter code
IAB
Insect - Aphid/Adelgid - Balsam
Management
Predators and insecticides are ineffective
SERIES of treatments required to grow Abies and permit required in quarantine zone.
Established quarantine zone, where live trees cannot moved out of.
Movement of cut trees restricted Jan 31-Nov 1**
Fall and burn in winter/ Debark logs prior to transport
FG criteria
No gouting (IAB kills once infection is set in)
Balsam wooly Adelgid host and range
True fir host.