i6 
THE COLORADO EXPERIMENT STATION 
» 
PEAR-TREE SLUG. (Eriocampoides limacina) 
Slimy dark-colored larvae with the head end much the 
larger, somewhat resembling 
snails, resting upon the up¬ 
per surface of the leaves, 
which they skeletonize. See 
Fig. 9. Two broods each 
year. 
Remedies.—Apply white hel¬ 
lebore (9) or any of the arse¬ 
nical mixtures (3-8), by dusting 
or by spraying. Freshly 
slacked lime (20)or wood ashes 
(29) freeley dusted upon the 
larvae will kill most of them. 
This is an easy insect to 
control and should not be 
allowed to continue its seri¬ 
ous injuries to the pear, 
Fig. 9.—Pear-tree Slug: a, adult fly; 6, larva fLic 
or slug with f-limy covering removed; c, plum and CUerry in tills 
same as preceding in natural condition; d , fof oc dnincr 
leaves showing slugs and their injuries. State as it na;> uccn 
(Marlatt, Circular 26, Second Series, U. S. vear? 
Dep, of Agr., Div. Entomology.) Ine P aSL iew y Ccllb - 
PEAR LEAF BLISTER (Phytoptus pyri ). 
Small dark spots upon the leaves, sometimes very abundant 
and involving the greater portion of the surface. The diseased 
portion is thickened also and at first is green like the rest of the 
leaf. The leaves often fall prematurely. 
Fig. 10-Plum Gouger: a, plum pit 
showing hole for exit of gouger; 6, 
gouger; c, side view of head of 
gouger showing beak and antenna. 
(Riley & Howard, Insect Life, Vol. 
II., U. S. Dep. of Agr., Div. of En¬ 
tomology.) 
Remedies .—Spray the trees while 
dormant with kerosene emulsion (14), 
treble strength; whale-oil soap (12), 
one pound to two gallons of water; or 
with lime and sulfur mixture. Gather 
and burn as many of the fallen leaves 
as possible. 
HOWARD’S SCALE. 
(Aspidiotus howardi.) 
This scale is too common in 
Colorado orchards. It is a close 
relative of the pernicious, or San Jose 
scale, but so far, has been most com¬ 
mon upon plum and pear. Pears, or 
any fruit affected with scales/should 
be reported promptly to the Experi¬ 
ment Station. See Plate I., Fig. 6. 
Remedies.—The same as for San 
Jose scale mentioned under apple in¬ 
sects. 
