Balsam Woolly Adelgid
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| a.k.a. Motley Woo(l) |
Girls, Girls, Girls = parthenogenesis
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Dirt??! Hey, that's not funny! And you can't call it dirt. It's SOIL!
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... and now back to our regularly scheduled lecture ...
Hosts & Range
 | introduced from Europe, discovered
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| Bl most susceptible, then Ba then Bg ... but thus far | ||||||||
| Bg most damaged, then Ba then Bl (difference is a matter of where established first and environmental conditions that disfavor the bug) |
Biology
| parthenogenesis (Girls, Girls, Girls) |
| gradual life cycle, sucking mouth parts |
| first instar is a crawler and is mobile, crawls towards light (i.e. up / out on crown to newer growth) then finds a feeding site (thin bark) becomes sessile |
| wingless, lay 100-200 (248?) eggs, may have 3 (2-4) generations per year (hey, how many offspring could one aphid produce in a single season?) |
| OW in nymph form, near/under bud scales |
S&S
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gout ("swelling of the knuckles") - anticoagulant secreted by bug causes host tissue to swell |
| crown thinning & flattened top |
| white woolly tufts on bark (purple smear!) |
Damage
| reduced increment |
| mortality |
| deformity |
| loss of B as a preferred (managed) species in some areas |
Mgmt
| predators - tried, no work |
| do not promote B as preferred species for regeneration in some areas |
| regulation / quarantine - your homework! |