EFFECTIVE ATTRACTION RADIUS: A Method ... - Chemical Ecology

754 BYERS ET AL.
Hylurgops pallia/us
m
a11.5]
Passive 1110.31 Attractive
n=86 9 9.1i n=29
9
7 . 9 i
mm 6.7i
m 5.5i
i 4.3 i=
i
3 . 1 1 i
1 . 9 i
.7i
i i i i i = i i i i
40 20 0 0 20 40
Trypodendron domest/cum
m
11.5
Passive 10.3 Attractive
n=17 9.11 n=5
7.91
6.71
5.51
4 . 3 i
IBm . 7 8
f I I I I I I I I I
40 20 0 0 20 40
Pityogenes chaloographus
m
mm 11.5|
Passive 9 Attractive
n=84 B 9.1in=22
7.9=
mm 6.7i
m ~ 5,5i
m 4,3~
BiB 3,1i
m 1.9~
.7i
i i i i i i i i i i
40 20 0 0 2O 40
PERCENT OF TOTAL CATCH
Cryphalus abie Pus
m
| 11.5 I
Passive I 10.3 I Attractive
n=242 I
m
m
m
i
i i i i I
40 20 0
9.1 a n=98
7.9m
6.7l
5.5a
4.3m~
3 , 1 B
1 . 9 B
.7mmm
I ! I I I
0 20 40
Pityogenes b/denta tus
m
11.5
Passive 10.3 Attract
n=23 9.1
7.9
me 6.7
9 5.5
I I I I I
40 20 0
4.3
n=6
3.1
1.9 mmmmmmm
.7
ive
I I I I I
0 20 40
Pityogenes quadridens
m
t 11.5
BB
Passive = 10.3 = Attractive
n=50 ii 9.1 II n=24
= 7.9 mmmimmm
mm 6.7 9
i 5.5
mm 43__
3.1
1.9
BB
I I I I I
40 20 0
.7
I I I I I
0 20 40
PERCENT OFTOTALCATCH
FIG. 1. Height of flying bark beetles as percent of total catch on passive sticky-screen
traps or "attractive" sticky-screen traps releasing host monoterpenes at each level [(+)-
c~-pinene, (-)-a-pinene, (+)-3-carene each at 10-20 mg/day and 3-5 mg/day of terpinolene].
Passive traps at each height on three 12-m poles were spaced 50 m away from
a central active trap pole in Scots pine forest (May 1, 1984).