146 PLANTING IN UGANDA 



gallons of water. This wash is much used in 

 America, against scale. It would be harmless to 

 Coffee trees. It should be very cautiously used on 

 Cocoa leaves. 



A spray we have used with good effect on Coffee 

 attacked with scale is a kerosene emulsion, made 

 as follows : Dissolve 1 Ib. of soft soap in a gallon 

 of boiling water. Add slowly, whilst continually 

 stirring, 1 gallon of kerosene. The mixture should 

 then be thoroughly churned with a syringe until 

 an emulsion is formed. For spraying, dilute with 

 water, using ten parts of the latter to one of the 

 mixture. The spraying should always be done in 

 the early morning. 



We think it right to say that we should hesitate 

 very much about recommending the use of this 

 mixture for Cocoa. Cocoa leaves being soft and 

 tender, are easily damaged by strong insecticides. 

 The leaves of Coffee will stand very strong mix- 

 tures. 



Fruit Flies. Several species of these attack 

 both Coffee and Cocoa. But we have so far ob- 

 served only the Coffee fly. The eggs are laid by the 

 fly under the skin of ripening fruits. The larvae, 

 when hatched, burrow into the fruit, and feed on 



