MEALY BUGS. 



247 



necessary also on fruit trees. The only other simple remedy is to 

 spray them with an insecticide. 

 Kerosene emulsion is a good 

 mixture for the softer woolly 

 ones ; rosin wash for the hard 

 scale-bearing species. Crude oil 

 emulsion or McDougaFs insecti- 

 cide are also good mixtures 

 and can be obtained ready 

 made. The insecticide must be 

 applied with some form of 

 spraying machine, not simply 

 thrown on with a syringe. In 

 gardens where many plants 



FIG. 297. 

 Coffee Mealy Bug. (Magnified.} 



are grown, the use of such 



insecticides is imperative if valuable plants are infested. 



