88 



ROSES 



damping down the house generally; (2) 

 admission of air. With full air on and ordi- 

 nary conditions the desired effect is main- 

 tained by using the hose under the benches 

 and on the walks. Above all things during 

 the summer stage avoid letting the house 

 get too warm. Sudden changes of temper- 

 ature are most inimical and are sure pre- 

 cursors of disease. Although it may not be 

 safe to syringe during dull days, we must at 

 the same time watch for red spider, applying 

 the remedy — water — at once if discovered. 



MILDEW PREVENTION 



As a preventive of mildew (one of the 

 worst enemies during summer and autumn), 

 if sulphur was not used in the whitewashing 

 of the benches and cannot be used on the 

 pipes it may be put on sheets of tin suspended 

 from the roof. This is easier and much 

 cheaper and more cleanly than dusting. But 

 the best preventive of mildew during summer 

 is abundance of air applied with judgment. 

 When sulphur is dusted on the plants they 

 should not be syringed for two or three days, 

 and the temperature during daytime in that 

 period run up to 85 and 90 degrees. 



