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needles
which has caused widespread dest
r uce
p
gall
a re also exte
r k
ba
beetles
d estructive insects
a nd are perhaps more d r eaded than any ot h er forest insects
of
urope
pruce is also much infested by f
attacked by
of them in nurseries
become yellow and succumb
is produced in t
white rot by
green rot by
species of minor impo
Y
r uce woods r equire watching
oung sp
willow should settle in t
P
a nc h es
br
the Operation being generally followed by a falling
h t growth
in heig
removed
in many cases it improves the quality of the timber
r ably
con side
they should be light
years
This i s necessary
r ing this pe r iod
du
of the cover
heavi
r
PI
IT
A
The specific gravity of
higher than that of the
fairly firm
I
M
N
chief devourer
h is
p
si
ely hollowed out
They specially follow caterpillar attacks
P
Y
oung plants up to a few y
and
h e r oot and the stem by
P
P
r tance
h em and inj u r e the
pruce does no t stand the p
and dry rot
a lly comm ence at the age of
gener
and f
followed by a considerable interruption
ft
r the age of
H
I
N
It has in
u
IT KA
however
cripples the shoots
and its alli
h ich kills large patches
w
owing to
attack the roots
and
r equently rep
as snow brea k age may occur
years the thinnings may be
M
N
timber is given as
or
ay spruce
r ope the same value
PRU
h e
is t
r ucti on
s
Y
oung seedli
P
and
r e many other
There a
lest birch
pruce
r uning of green
r anc h es may be
b
to
ated up to the age of
I
ITK A
The timber i s soft
that of the
The
which
T he
are most
gs
r s old
a
rot
a spen
a nd
years
U
R
or slightly
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