8 
Colorado Experiment Station 
The second spray should be applied as soon as the eggs begin 
to hatch, and the larvae to enter the fruit. This will be about three 
weeks after the first spray is applied. The hatching of the first brood 
eggs continues over a considerable period of time, and most growers 
' find that it pays to direct still another application against them. This 
should follow about two weeks after the other spray. 
If the orchard has been badly infested, or is near one that is 
badly infested, it will pay to spray for the second brood. If a sec¬ 
ond brood spray is applied, it should follow about nine weeks after 
the first. If the worms are numerous, another treatment may be 
made in two weeks. All sprays after the first are to cover the surface 
of the fruit with poison. 
Remedy No. 29, that of using bands, is a great help in keeping 
this pest under control. 
Fruit-Tree Leaf Roller. —This pest often blemishes and even 
destroys much fruit early in the season. The little larvae begin to 
feed freely about the time the apples begin to form. Entire clusters 
of fruit may be destroyed then, or be so blemished that they will be 
of no value. See Plate 2. 
Eor remedies, see under Foliage. 
Green Fruit Worm .—This is a large green caterpillar witn a 
narrow cream-colored stripe down the middle of the back, and a wide 
but less distinct line down each side. When fully grown, the larvae 
are from one to one and a half inches long. There is but one brood 
in a season. The moths appear in the spring and'lay their eggs upon 
the fruit trees. The larvae hatch out and feed upon the leaves and 
fruit. The blemished fruit will often remain on the tree until pick¬ 
ing time, but will show the scars. This worm feeds upon most of the 
tree fruits, but is most often found on the apple and pear. It feeds 
during May and early June. 
Remedies .—The fruit worm very seldom gets numerous enough 
to demand attention. Spraying for the codling moth aids in keeping 
it in check. Any of the arsenicals will be found effective if applied 
while the larva is small. 
Plum Curculio. —The plum curculio often does serious damage to 
apoles, and will attack pears, but is not as serious on these as on stone 
fruits.^ The damage comes from the feeding and egg-laying punctures. 
This insect has never b-^en reported in Colorado. Eor. description and 
remedies see under Plum. 
Apble Curculio. —This is very similar to the plum curculio and is 
often taken for it. It is a reddish brown snout-beetle about one-quarter 
inch in length with a snout or beak one-half as long as the body. It 
