66 



The Canadian Horticulturist. 



The above description will enable fruit growers to recognize this enemy, 

 should they be unfortunate enough to get their orchards infested with it. 



Remedies. 



With regard to remedies, we have the advantage of all the experience of 

 Californian experiments and the careful work of the Division of Entomology at 

 Washington, as well as of Prof. J. B. Smith, of New Jersey, during the past year. 

 There are three methods which have proved effective in fighting the San Jose 

 Scale. In cases of severe attack it is recommended to cut down the infested 

 trees and burn them. The other methods are, spraying with insecticidal washes, 

 or fumigating the trees with poisonous gases. The insecticidal washes may be 

 divided into summer washes, which can be applied while the trees are in leaf, 

 and winter washes of a stronger nature, which would injure the foliage but will 

 do no harm to the trees during the winter, when they are in a dormant condi- 



d 



Fig. 724. 

 San Jos6 Scale 



Fig. 725. 

 (Part of infested branch, life. size. 



tion, and yet will have the effect of destroying the scale insect. Of the summer 

 7vashes, the ordinary kerosene emulsion (Riley-Hubbard formula) and a resin 

 wash [resin 20 lbs., caustic soda (70 per cent, strength) 5 lbs., fish oil 3 pints, 

 water 100 gallons[ were recommended by Mr. Howard, and used with success 

 during the past summer. On peach trees, owing to the susceptibility of the 

 foliage to injury, the stock kerosene emulsion was diluted with fifteen times its 

 volume of water, instead of nine times, the usual strength advised for mo?t other 

 plants. It was found advisable to repeat the spraying at intervals of about a 



