290 



APPLE. 



insects infesting other trees and shrubs, provided the fruit, if 

 any, be not more than half-grown." 



"For the CodKn Moth trees should be sprayed with this 

 mixture for the first time just after the bloom has fallen. The 

 second application should follow in about ten days or two 

 weeks ; and the third about ten days after the second. This 

 late application may safely be dispensed with, however, if the 

 season be dry, and few showers fall during the periods between 

 applications, or soon after the second. Only enough of the 

 mixture should be used to wet the foliage without drenching it, 

 as it has been found that, with this amount, enough of the 

 poison will become lodged in the calyx of the apple to destroy 

 the young worm as soon as it hatches and partakes of its first 

 meal. Great caution must be exercised to keep this poison 

 well mixed, as, being heavier than water, it sinks rapidly to 

 the bottom of the vessel, and there is danger of some of the 

 mixture thereby becoming too weak to be effective, and some 

 of it so strong as to kill the foliage. No attempt should be 

 made to spray the trees after the apples have changed their 

 position and the stem end is upward, as the poison will only 

 collect and settle in the cavity about the stem, and render the 

 use of the fruit dangerous to human life."* 



For further references regarding proportions of Paris-green 

 which it might be prudent to begin trials with, at 5- a lb. 

 rather than 1 lb. to 150 gallons of water ; also for cautions in 

 use of this poison, especially as to non-inhaling the powder in 

 mixing ; and for information regarding engines or apparatus 

 for distributing, see paper on "Paris-green " and references in 

 Index. 



"Blue Head" Caterpillar of Figure-of-8 Moth. 



Diluba caruleoccphala, Liim. 



qi^ 



Figure-of-8 Moth, and-(" blue-head") caterpillar. 



Specimens of this fine caterpillar are now regularly sent 

 yearly amongst samples of the various kinds which are doing 



* " Insecticides and their Application," by Prof. F. M. Webster, extracted from 

 Indiana Horticultural Eeport.' 



