ESSAY ON ROSE GROWING. 95 



MILDEW. 



Roses, when grown under glass, with proper attention 

 to temperature and moisture, are not usually attacked by 

 mildew ; but as a preventive it is well to paint the hot- 

 water pipes once every two or three weeks with a mixture 

 of sulphur and lime or sulphur and guano, made of the 

 consistency of whitewash, (the guano or lime is merely to 

 make the sulphur stick better to the pipes.) The fumes 

 of sulphur, as diffused by the heated pipes, is a never- 

 failing means of destroying the germs of mildew or any 

 other fungoid growth, and also holds in check, to some 

 extent, the Red Spider insect, often so troublesome to 

 the Rose. 



ROSE BUG. 



For the Rose Bug, so destructive to success in Rose 

 growing under glass, there seems no remedy except the 

 slow and unsatisfactory one of catching and killing the 

 insect as soon as it is seen on the leaves. It is not easily 

 observed, as it gets under the leaves and close to the 

 shoots of the plants. Its presence is known by the bitten 

 leaves showing where it is feeding; but even with the 

 greatest diligence enough will usually escape to deposit 

 their eggs in the soil, which, when hatched out to the 

 grub or pupa state, rapidly begin the work of destruction 

 by feeding on the roots. In this stage, all attempts to 

 destroy them have thus far, I believe, failed. 



The only safety, when the Rose Bug is known to be 

 present in sufficient numbers to injure, is to throw out 

 the plants and start with young ones. I have, for three 

 years past, adopted the plan of growing the plants 

 only one year old from cuttings rooted during the fall or 

 winter months, and have since then had no trouble what- 



