INSECTS, DISEASES AND SPRAYING 63 



the direction toward the tip of the cane. It 

 is not unusual for a diseased plant to send up 

 apparently healthy shoots from near the base 

 of the stem, but these become infested in turn. 



Roses whose foliage has a sickly colour, and 

 whose leaves fall, especially from the tips of 

 the canes, prematurely, may be suspected of 

 being victims of the anthracnose. A hand 

 lens should be sufficient to assist in finding 

 pinkish blotches upon the leaves, particularly 

 those that lie upon the moist earth beneath the 

 half-defoliated plant. Similar, but better 

 defined pimples usually occur upon some 

 portion of the cane. 



The multitude of spores produced in pim- 

 ples upon canes and fallen leaves, the ease 

 with which they are transported by water, 

 the rapidity of germination — all these factors 

 combine to render this fungous enemy of the 

 rose highly contagious. 



A coating of the Bordeaux mixture upon 

 the leaves and stems prevents in large degree 

 the entrance of the germs. All plants that 

 are nearly leafless from this cause should be 

 either cut down close to the soil or thrown 

 bodily into the burn-heap. 



The Rose-Leaf Spot. — Somewhat similar 



