INSECTS AND INSECTICIDES 
By C. P. GILLETTE and GEO. M. LIST 
INTRODUCTION 
The purpose of this bulletin is to furnish brief information re¬ 
garding the insects that are most frequently found doing destructive 
work on small fruits, orchards, shade trees and shrubs of this State. 
The aim has been to give a concise description of the insects 
and the treatments that have been found to be most successful in 
controlling them. The arrangement is not according to the scien¬ 
tific classification of the insects, but according to their host plants. 
Part Two, on The Preparation and Use of Insecticides has been 
made as brief as possible and only the formulae that are in accord¬ 
ance with the best practice are given. Throughout the first part, 
the insecticides are referred to by number, for sake of brevity. 
If you are in doubt as to the pest that is annoying you, feel free 
to write the Experiment Station and send specimens for identifica¬ 
tion. Place the insects in a box, along with some of their food, and 
then write us wliat information you cnn as to their work and habits. 
PART I. 
INSECTS INJURIOUS TO TREES, SHRUBS AND SMALL 
ERUITS. 
APPLE AND PEAR 
Eruit 
Codling Moth .—This insect probably does more damage to the ap¬ 
ples and pears of the State than all other insects combined. Most orchard 
men are very familiar with the flesh-colored larva that eats into the apple 
and causes the wormy fruit, but few are familiar with the moth that 
lays the egg from which this larva hatches. It is a sm'all grayish- 
brown moth resembling the color of the apple bark and has a wing 
expansion of from one-half to three-fourths of an inch. It flies 
mostly in the twilight and is not attracted by light. It flies with a 
zig-zag motion and does not remain long on the wing. 
The larvae pass the winter in tough silken cocoons under the 
rough bark, in crotches of the tre^s, in cellars and packing houses, 
in fruit boxes, and in rubbish on the ground. The moths begin to 
emerge as the blossoms fall from the trees, and soon begin to lay 
their eggs upon the upner surface of th^ leaves n^ar the small fruit. 
Later in the season, when the fruit is larger and the fuzz has been 
rubbed off, many eggs are placed directly noon the fruit. Our 
records show that about 65 percent of the little larvae of the first 
