Pomaceous Fruits 



49 



structive in regions of exces- 

 sive humidity, particularly 

 in the deep mountain valleys 

 of the Appalachians, where 

 whole orchards are some- 

 times seriously affected. 



Owing to the entirely su- 

 perficial nature of the fungus 

 which causes the disease, 

 and its habit of hibernating 

 upon the twigs, the trees 

 should be sprayed with a 

 strong cleansing mixture, 

 Bordeaux or bluestone, be- 

 fore the buds open, and 

 again just before the blos- 

 soms open. 



Pink-rot ^^ {Cephalothe- 

 cium roseum Cda.). — This 

 rot is known in many states. 

 It follows apple or quince 

 scab and may be recognized 

 by the white, mildew-like 

 growth which appears in 

 conjunction with the scab 

 which it soon after entirely 

 overgrows and turns to a 

 pink color. 



While the decay is really 

 caused by Cephalothecium, 

 a rupture made in the skin 

 by the scab fungus is the 

 usual place of entrance. The 

 decayed spot is shallow and 

 slow-growing as compared 

 with other rots. It is ac- 

 companied by a bitter taste 



Fig. 23. — H3^ochnose, showing 

 sclerotia on twig at left and rhi- 

 zomorphic strands on twig at 

 right. Original. 



