8 
Bulletin 71. 
Remedies .—The same as for the following species except that it is not 
practical to collect the eggs which are deposited upon the leaves. 
tent caterpillar. (Clisiocampa fragilis) 
This insect also hatches as soon as the leaf buds open, and 
builds small webs in the forks of the branches. A large number of 
caterpillars inhabit a web or tent, which is increased as necessity 
requires. See Plate I., Fig. 1. 
Remedies .—While the foliage is off, collect the large egg-clusters which 
are stuck to small limbs. They are covered with a dark, spongy material and are 
quite readily seen, appearing as galls or swellings of the limbs. If this remedy 
has been neglected, spray with the arsenical mixtures (4, 3, 6, 8, 5). While the 
tents are small they may be cut out and burned if on small limbs. If on large 
limbs they may be burned out with a torch. 
APPLE FLEA-BEETLE. (Halticd Sp.) 
The apple flea-beetle is a small metalic-green insect, about an 
eight of an inch in length, which jumps or drops from the foliage 
when disturbed. It is most abundant on young trees or nursery 
stock or sprouts. 
Remedies .—Any of the arsenical mixtures (3 to 8) are effectual in destroy¬ 
ing this insect or driving it from the foliage. It can usually be driven from the 
leaves by the application of dry substances, such as lime, ashes, plaster, 
etc. (32, 33). 
brown mite. (Bryobia pratensis.) 
The brown or clover mite is extremely small and its presence 
is usually first detected by the faded, sickly appearance of the 
foliage. See Plate III., Fig. 1. The trees appear to need more 
water. The mites feed upon the leaves but deposit their rust-colored 
eggs upon trunk and limbs. When very abundant, these eggs color 
the bark red, which is most often noticed during winter. 
Remedies .—To destroy the eggs while the trees are dormant (during 
winter), use lime, salt and sulfur mixture (21); kerosene emulsion (14), quad¬ 
ruple strength; whale-oil soap (12), quadruple strength, or crude petroleum (16). 
To kill the mites during summer use kerosene emulsion or whale-oil soap of ordi¬ 
nary strengths. It is far better to treat the eggs. 
APPLE PLANT LOUSE. (Aphis TYiali.) 
A green aphis curling the leaves of apple trees, most abundant 
late in the season, after the middle of July. See eggs on apple 
twig, Plate III., Fig. 4. 
Remedies —For the destruction of the eggs, proceed as for the destruction 
of the eggs of the brown mite above. To destroy the lice, apply kerosene 
emulsion (14), or whale-oil soap (12), thoroughly and in a manner to bring the 
liquid in contact with the bodies of the lice. 
SCALE INSECTS. 
For the treatment of scale insects it is advisable, in each case, 
to write to the Experiment Station for specific directions. Specimens 
