38 



2ml. If the moths are prevented from ascending the 

 tree, th(!y will deposit their eggs below the obstruction, and 

 for the most part near to it. These egg.s can be deatroyed 

 by a single application of kerosene oil. 



3id. If the moths are not prevented from a.scending 

 the tree, they will deposit their eggs mostly upon the 

 under-side of the .scales of bark on the upper part of the 

 trunk and larger branches. Many of these can be destroyed 

 by scraping off and burning the scales. i /. i 



4th. If all these precautions have been neglected, and 

 the eggs allowed to hatch as soon as the worms are large 

 enough to be easily seen, jar them from the trees, and sweep 

 them away with a pole as they hang by their threads, and 

 burn or otherwise destroy them. 



5th. If the worms have matured and gone into the 

 g-'ound for winter quarters, plough the ground late in the 

 fi so as to expose the pupee to frost and to the action of 

 their natural enemies. 



APPLE TREE PLANT LOUSE (APLUS.) 



Aplirdes or plant lice frequently infest the leaves of the 

 apple, pear, cherry. When they appear in vast numbers 

 they retard growth, and injure the trees by sucking the 

 juices. They may be destroyed by the use of whale oil 

 soap, or an emulsion 3f kerosene. 



Prof. Fletcher, Ottawa, gives the following formula for 

 soap emulsion : 



Kerosene 2 gallons. 



Rain water i gallon. 



Common, or whale oil soap yi ft. 



Heat the solution of soap, and add it boiling hot to the 

 kerosene. Churn the mixture until it forms a cream which 

 thickens on cooling, and should adhere without oiliness to 

 the surface of glass. Dilute, before using, one-part of the 

 emulsion with nine parts of cold wate:*. The above formula 

 gives about three gallons of emulsion, and makes, when 

 diluted, thirty gallons of wash. 



SPRAYING WITH ARSENITES. ' 



. One of the most important discoveries in the use of 

 . insecticides within ihe last few years is the use of arsenical 

 poisons as a remedy for the canker worm, codling moth, 

 caterpillar, and other insects that destroy the foliage. For 

 this purpose Paris green has been much more extensively 

 used than any other compound. It is a compound of arsenic 

 - , 3 



