APPLE PESTS 
entirely ineffective and Paris green is not 
much better. Contact sprays seem to be 
mefficient and there temain but two 
methods that offer any great chance of 
success; one is to collect or to destroy the 
egg masses. 
Second, by placing sticky bands on the 
trees and then jarring the trees. These 
may be made of tangle foot or some tar 
compound. Jarring the trees will cause 
the larvae to drop to the ground and 
when the trees are banded they cannot 
get past the bands as long as they remain 
fresh. 
White Dotted Apple Worm 
Balsa malana 
In early fall and continuing until late 
autumn may sometimes be found a rather 
stout, cylindrical, light-green worm, about 
an inch long and marked with five white 
longitudinal lines and numerous whitish 
dots. hese worms are in the habit of 
feeding solitary and alone on the under- 
side of the leaves, from the margins of 
which they eat regular notches or holes 
into the middle. This caterpillar is 
known as the white dotted apple worm. 
When full grown, the caterpillar draws 
together a portion of the leaf with silken 
threads to form a hollow tube. This is 
lined with a thin layer of silk and the 
caterpillar then passes into the pupal 
stage. The chrysalis remains in the fallen 
leaf until the next spring, when it issues 
as an ashy gray moth with three irregu- 
lar black lines crossing the front wings. 
There are two broods. 
H. A. Gossarn, 
Wooster, Ohio. 
Witt Bure.—See Apple Wilt Bug, this 
section. 
Wootty ApHiIs.—See Aphids. 
A Japanese Formula for Destroying the 
Woolly Aphis 
Mr. T. Machida of Japan has recently 
found a very satisfactory wash formula 
which has been found to be of much value 
in the control of the woolly apple aphis. 
His recommendations for the various in- 
gredients to be used are as follows: 
Rane-seed oi] .... ..... 31/3 pints 
Sulphur oe ee 11/2 ounces 
Turpentine ... . 11/3 ounces 
545 
The rape seed oil should be boiled alone 
for a very short time followed by adding 
the turpentine slowly, stirring continually 
until they are thoroughly mixed. Stir in 
the required amount of well crushed sul- 
phur. Use a strong fire and allow to cool, 
when the mixture assumes a darkish 
color. Paint the attacked parts of fruit 
trees. This wash can also be recom- 
mended for use in the control of other 
aphids and the destruction of their eggs. 
S. NAKAYAMA, 
Stanford University. 
California Com Hort, Tl, No 2. 
Yellow-Necked Datana 
D. ministra 
Often conspicuous and quite injurious 
in September. Most of the caterpillars are 
well grown before the middle of the 
month and are ravenous feeders upon ap- 
ple and other orchard and forest trees. 
The full-grown caterpillar is about two 
inches long with a black head and a yel- 
low neck. A black stripe extends down 
the middle of the back and three stripes 
of the same color, alternating with four 
yellow strips, extend along each side. The 
body is quite hairy. The caterpillars are 
gregarious and collect together in large 
numbers out towards the ends of the 
twigs. If the branch is jarred or the cat- 
erpillars are in any way disturbed, they 
cling for support with their four middle 
pairs of legs, and elevate both ends of 
their bodies in the air at right angles to 
their support. Some time in September, 
they all descend to the earth and burrow 
beneath the surface from two to four 
inches, where they pupate. When the col- 
onies are young, they are confined to a 
single small branch, which may be cut off 
and burned. After they become more ma- 
ture, resort to hand-picking or spray the 
trees on which they are feeding, if not 
carrying fruit, with arsenate of lead, 5 
pounds in 50 gallons of water. Kerosene 
emulsion may be diluted with 12 to 15 
parts of water and sprayed directly on 
them. Make oil sprayings only on dry, 
sunshiny days so as to avoid all danger of 
injury to the foliage. The raincrows or 
cuckoos feed quite freely on these hairy 
