180 MILDEW OX THE EOSE. 



ground, into a strong young shoot, and is not dis- 

 covered till July or August, when we see its 

 efifects from the dropping of the top of the young 

 shoot. As soon as this is noticed, cut off about 

 twelve inches of it, and the little grub will be 

 found in its centre, which, if allowed to remain, 

 will come out under a leaf, near the top, drop into 

 the ground, and live again to renew its depreda- 

 tions the followino: season. 



MILDEW OX THE EOSE. 



UxDER artificial culture, this disease is fre- 

 quently observed, or, as some writers term it, the 

 effects of the disease ; very few agree as to its 

 origin or character. From our observation, it 

 appears to be most common where extremes of 

 temperature prevail ; even in the open air this is 

 plainly seen ; in July or August, we occasionally 

 have a few cold nights, succeeded by rain and warm 

 weather, and as certainly as that kind of weather 

 occurs, as certainly does the mildew follow. It is 

 rarely seen in our collection of roses, few of which 

 are kept in high temperatures, and, when it 

 appears, a few syringings of sulphur water are 

 applied, which destroys it. AVe prepare sulphur 



