30 HOW TO GROW ROSES 



Insects 



Probably our worst enemy to roses is the ROSE CHAFER 

 ("Rose Bug"), which is particularly severe on sandy soils. 

 For this, handpicking into a vessel of kerosene is effective, or 

 a half pound of arsenate of lead in twelve gallons of water, 

 or bordeaux mixture (one ounce to one and a half gallons 

 of water). Spray on every two weeks through June and 

 July as a preventive. This is also a good remedy for the 

 ROSE-SLUG, which skeletonizes the leaves. It works from 

 the under side of the foliage so when going after it, turn the 

 foliage down side up and spray it thoroughly. 



APHIDES, or GREEN FLIES, attack the plants during May 

 and June, and, if not dispatched, they multiply rapidly, and 

 suck the life-blood from the leaves. A vigorous spraying of 

 Thompson's rose nicotine or whale-oil soap will settle them. 

 SCALE seldom bothers any except old, neglected shrub roses. 

 Use scalecide or lime-sulphur wash. 



Diseases 



Of the fungous diseases, POWDERY MILDEW is by far the 

 worst and most difficult to overcome. It will be recognized 

 as a white mold appearing on the foliage, which, if not 

 checked, will spread. 



This is most likely to occur in warm, damp weather, and 

 certain varieties, such as Crimson Ramblers, are more sub- 

 ject to its attacks. Bordeaux mixture, applied at fortnightly 

 intervals, is a good preventive (see formula above). As a 

 cure, flowers of sulphur dusted on the foliage is recom- 

 mended, also "grape dust." For BLACK-SPOT, RUST, and 

 other fungous diseases, follow the same course. Also 

 promptly remove and burn foliage thus affected. 



BUD-ROT. Outer petals turn brown and buds fail to 

 open. No satisfactory remedy is known. 



The beginner need not be dismayed at the above array of 

 troubles that may happen; if they do, these hints are offered 

 as a "first aid to the injured." As a matter of fact, not all the 

 above pests are likely to appear in the same garden. It is 

 not so complicated or difficult as might appear. 



