120 



DISEASES OF ECONOMIC PLANTS 



which spreads the spores and furnishes moisture enough to 



allow them to germinate, followed by a dry spell, best 



favors the development of this disease. 



The use of the Bordeaux mixture 

 has proved very satisfactory. Apply 

 about every ten days during the early 

 growing season; more frequently if 

 necessary to replace any poison 

 washed off by the rain. 



Wood rot (Schizophyllum commune 

 Fr.). — Small white specks, the sporo- 

 phores, appear upon the limbs and 

 trunic in early summer.' In the au- 

 tumn they are well developed and 

 abundant; white and very hairy, 1-3 

 cm. in diameter, usually attached on 

 one side with the margins incurved. 

 The gills are white, woolly, branched, 

 deeply split along the edge, and 

 revolute. 



The affected wood is brittle and 



penetrated by black lines. Apparently this disease starts 



in roots injured by tools during cultivation. 



Fig. 53. — Schizophyllum 

 commune, frequently the 

 causal fungus of wood rot 

 of cherry and other trees. 

 After Atkinson. 



PEACH 



Brown rot, mold (Sclerotinia frudigena (Pers.) Schrcet.). 

 • — Probably no other disease is so destructive to peaches, 

 plums, and cherries as is the brown rot, which attacks 

 the fruits as they approach maturity, turning them 

 brown, soft, and useless. Aside from injuring the mature 



1 Heald, F. D., Neb. Agr. Exp. Sta. Rpt. 19, p. 29. 



