Attack by Oiling 



167 



fuel oil used in Panama, about 20° Baum6, pro- 

 vided five per cent, to ten per cent, by volume of 

 larvacide is added. 



The advantages of its use are that oil may be 

 applied properly on the water surface wherever 

 desired from one to twenty feet from the operator. 



Regular Bordeaux. Bordeaux Special 



Spray nozzles. 



He pumps with one hand and directs the oil-stream 

 or spray with the other. The work is less tiring 

 than using a watering can, and while traveling over 

 rough ground the laborer has both hands free. No 

 oil is spilled or wasted by too rapid application. 



It is not necessary to have the spray as fine or 

 its particles of liquid as minute as those used in the 

 application of insecticide. All that is desired is 

 that the oil should spread rapidly upon the water 

 and form a thin film. 



