190 TREES AS GOOD CITIZENS 



Kerosene 2 gallons 



Fish-oil soap (or laundry soap) yi pound 



Water 1 gallon 



(One quart of soft soap may be used instead of the soaps 

 specified above.) 



Boil the water and soap together until the soap dis- 

 solves. This mixture should then be removed from the 

 fire, the kerosene added and the mixture stirred briskly 

 for five minutes, or until it has the consistency of cream. 



This concentrated mixture must be diluted with water 

 at the time of spraying. For use in summer, when the 

 trees are in leaf, the dilution should be at the rate of 5^3 

 gallons of water to each gallon of the mixture. For use 

 in winter, when the trees are dormant, the rate should be 

 \ 2 /i to 3 gallons of water to each gallon of the mixture. 

 The concentrated mixture will keep for some time in its 

 original form, but the diluted mixture should be used as 

 soon as prepared. 



Creosote Oil. This is used for the destruction of tus- 

 sock moth egg masses, especially when they cannot be 

 removed successfully. It is applied by daubing with a 

 mop. The oil thickens in cold weather, in which case it 

 requires thinning with turpentine. 



Miscible Oils. There are various miscible oils, which 

 are mixtures to be bought ready-made. Their use is 

 effective in controlling the scale insects. The mixtures are 

 sold under various trade names, and since they vary in 

 strength, careful attention must be paid to the directions 

 for dilution as printed on the labels. These oils are apt 

 to injure foliage if applied during the leaf season, and for 

 this reason they are usually employed as winter sprays. 

 In addition to this factor, winter spraying has the added 

 advantages that the absence of foliage makes it possible 

 to use stronger solution, and also makes it easier to reach 

 the insects with the spray. 



