104 DISEASES OF THE SWEET PEA 



similar. The fungus attacks the phloem 

 or food tracts and makes its way into the 

 parench3ana cells as well as to the epider- 

 mal cells. The effect produced is loss of 

 turgidity, wilting, and early collapse of 

 the host. 



Growers should not fail to recognize 

 Rhizoctonia root rot in its initial stage. 

 To allow this fungus to get a foothold 

 would mean the ruin of an otherwise prom- 

 ising crop. 



CHiETOMIUM ROOT ROT 



Chcetomium spirochczte Patt. 



In the autumn of 1912, Professor A. C. 

 Beal of Cornell University sent me for 

 diagnosis diseased specimens of green- 

 house sweet peas. The trouble was read- 

 ily located in the roots. A fungus was 

 found invading the interior tissues of the 

 roots, but no fruiting stage of any kind to 



