510 
Round-Headed Apple Tree Borer. Larva 
Fig. 1. 
(After Chittenden) 
and female beetle. 
Spotted Apple Tree Borer 
Saperda cretata Newm. 
Related to the round-headed borer and 
similar in appearance except that it has 
two white spots on each wing case. 
The species is quite widely distributed 
having been found from Michigan to 
Texas. 
Remedies the same as for round-headed 
borer. 
Bronze Apple Tree Weevil 
Magdalis aenescens Lec. 
HH: FF. WILSON 
Like many of the common insects found 
in Oregon, this insect appears to be a 
native of the Northwest, and has only 
been reported from Oregon, Washington 
and British Columbia. When first no- 
ticed, it was reported as destroying whole 
apple orchards, but later observations 
show that most of the feeding occurs in 
the bark. In many instances the bark 
appears to be dead before the weevils 
Fig. 1. The Bronze Apple Tree Weevil; show- 
ing egg cells in bark of apple. (Original) 
ENCYCLOPEDIA OF PRACTICAL HORTICULTURE 
make their egg punctures, but it has also 
been noticed that healthy bark affords 
suitable places for egg deposition and 
several growers in the Willamette valley 
report serious injury to apple trees. 
If one notices the egg cells, as shown 
in Fig. 1, and cuts away the bark, the 
larval galleries can be easily traced to 
‘where the larvae are feeding. 
The egg cells are made by the female 
weevil, which eats out circular burrows 
to a depth of .08 inch. The eggs are 
then deposited singly in a few of the 
pits and the young white larvae hatch 
from these in a week or two. They feed 
and develop in these burrows until fall, 
when the larvae hibernate over, pupate 
in the spring and change to adults. 
The adult insect is an elongate bronze 
black beetle, measuring about one-fifth 
inch in length. 
Methods of Control 
Careful examination of trees in locali- 
ties where this insect is found and cut- 
ting out the infested areas appears to be 
the most satisfactory method for combat- 
ing this pest. 
Brown Tail Moth 
Euproctis chrysorrhoea Linn. 
H. F. WILson 
Accidently introduced into this country 
along in the nineties on nursery stock 
imported from Holland; the brown tail 
moth has become one of our worst insect 
enemies of orchard, forest, ornamental 
and shade trees. . 
Not now present in the Northwest but 
over wintering nests have been brought 
in on nursery stock and there is danger 
of its becoming a pest. 
The eggs hatch during August and the 
larvae live over winter in nests of leaves 
drawn together by silken threads. The 
eggs are globular in shape and quite 
small; they are laid in masses on the 
under side of the leaves along in late 
July and early August. Each mass con- 
tains approximately 300 eggs, is brown 
in color and covered with numerous 
brown hairs taken from the body of the 
moth. * The egg masses measure two- 
thirds of an inch in length by one-fourth 
