MEALY BUf!R. 



247 



noeessary ali^o on hmi ivoofi. Tlio only olliov Rim])lo vomody is \o 

 spray them willi an insecticide. 

 Kerosene emulsion is a g-ood 

 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 



Fig. 297. 

 gardens where many plants ^^^^^ ^^^^^^ ^.^^^^ (ATa^niJied.) 



are grown, the use of such 



insecticides is imperative if valuable plants are infested. 



