G8 Bureau of Farmers' Ijststitutes. 



particularly if the application is timely, but conditions are not 

 always such that spraying is practicable. Sometimes when the 

 caterpillars are present in very large numbers and the poison has 

 not been applied till late, the trees may be stripped in spite of the 

 insecticide, but under ordinary conditions there need be little 

 fear of the poison proving ineffective. Where spraying is not 

 done, it will probably be wise to supplement the destruction of 

 eggs and caterpillars by collecting and burning the cocoons. The 

 village of Glens Falls, and several others, paid school children 10 

 cents per quart for collecting the cocoons in 1899, and excellent 

 results were obtained. At Glens Falls 1350 quarts of cocoons 

 were destroyed. Whenever this is done to any great extent, it 

 would be well to put the cocoons in boxes covered with a wire 

 netting, about 3-16 inch mesh, so as to allow the smaller parasites 

 to escape and jet to confine the moths. When the caterpillars 

 are present in large numbers nothing but the most vigorous meas- 

 ures will prevent severe injuries to the infested trees. 



Codling moth. — One of the most important orchard insects to- 

 day is the common codling moth or apple worm, Carpocapsa 

 pomonella. The wormy apple, well represented at figure 1, on 

 plate 3, is familiar to most of us. Were we to go into the orchard 

 in winter and look under partly loosened bark scales, we would 

 find a condition very much as represented at figure 2, on plate 3. 

 Under the loose bark there is a silken cocoon and within it a 

 partly curled, whitish worm or caterpillar, which is represented 

 much larger at figure 1, plate 4. The winter is passed in this 

 condition. In the spring the transformation to the pupa occurs 

 and about the time the apple trees blossom, the moths (plate 3, 

 figures 3, 4) come forth. About a week later the eggs are laid on 

 the leaves or sides of the young fruit and in about two weeks from 

 blossoming the young caterpillar or apple worm emerges from the 

 egg and usually enters the fruit at the blossom end. This habit 

 renders the control of the pest by spraying comparatively easy, 

 provided it is done thoroughly and at the right time. Any time 

 after the white petals have fallen and before the green calyx lobes 

 have closed is the proper time to spray for this pest. Figure 3 on 



