jeffrey pine trees killed by the jeffrey pine beetle – little valley, near reno, nv 1998
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Jeffrey pine trees killed by the Jeffrey Pine Beetle – Little Valley, Near Reno, NV 1998
Mark McGregor, USDA Forest Service
Pitch tubes:Jeffrey pine beetle attackingJeffrey pine tree
Pine engraver beetle, Ips piniColonizing Jeffrey pine log
JH treated male D. jeffreyiantisense probe to HMG-R
crop Ventriculus (midgut)
rectum
Hall
Pheromone production occursIn midgut of bark beetles
Pheromone-Biosynthetic Gene Expression Profiles:
Induced by feeding or JH treatment
Males-7-6-5-4-3-2-10123456
0 5 10 15 20 25 30 35
Time (h)
Thiolase HMG-SHMG-R DecarboxylaseIsomerase GPPSFPPS
-2
-1
0
1
2
3
4
5
6
7
8
9
10
AACT
HM
G-S
HM
G-R
MK
MPD
C
IPPI
GPP
S
FPPS
log
2(R
elati
ve E
xpre
ssio
n) (+
SE)Basal expression levels
higher in males than females
Localized to anterior midgut
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