5O ROSES 



powder or tobacco dust, or they must be hit 

 with an oil, a soap, or a tobacco spray. 

 Kerosene emulsion, a strong tobacco decoc- 

 tion, or whale-oil soap (one pound in six to 

 eight gallons of water), will kill all that are 

 wet with the spray, but it is practically impos- 

 sible to hit them all with one application, and 

 they develop so rapidly that usually it is 

 necessary to repeat the dose several times 

 during the season. Either of these sprays 

 will doubtless kill any slugs that may be at 

 work at the same time. 



WATER AND POISONS AS REMEDIES 



If a strong water pressure is available, one 

 can often master all of these serious enemies 

 of the garden rose bush with the hose and 

 a coarse spray nozzle, by simply knocking off 

 the insects with a spray every few days. 



In trying poisons, remember that rose 

 foliage is tender and may be injured by strong 

 mixtures. 



Very common is the bark louse, which sur- 

 vives the winter and is usually found on old 

 wood. It can best be treated before growth 

 begins in the spring and can be removed by 

 scrubbing with a tooth-brush and a plentiful 



