338 



DISEASES OF ECONOMIC PLANTS 



Fia. 144. — Corn mold caused by 

 Fusarium. After Burrill & Barrett. 



of this pest. Practically, this 

 means to take out of the field 

 and destroy all rot-infected 

 ears and to cut infected stalks 

 low and haul them away or 

 burn them. It is still better 

 to practice such rotation that 

 corn will not follow corn 

 within two years. Badly in- 

 fected fields or spots in fields 

 should never be planted to 

 corn without rotation. 



Dry rot, fusariose (Fusa- 

 rium). — Upon the ears this 

 disease appears as a dense, 

 felted, white mycelium, ex- 

 tending between the kernels 

 to the cob. The kernels are 

 killed and their starch partly 

 consumed. 



A second fusarium disease 

 is characterized by a deep 

 pink to red color noted on the 

 ear when the husks are re- 

 moved. The kernels are brit- 

 tle and the starchy portion 

 ' powdery. 



A third fusarium disease 

 causes less complete destruc- 

 tion of the ear than the pre- 

 ceding; often only a few 



