142 



DISEASES OF CHOPS. 



Cure. — See those already described for destroying P. 

 infestans (the potato-disease fungus). 



The Fusisporium of Cabbages {Fusisporium 

 aurantiacum) has a similar life-history to F. solani 



Fig. 47. — White Ensi Fungus or Cabbages {Cystopus candidus). 



A. Mycelium bearing couidia. x 195. 



B. Conidiuni (zoosporangium) producing zoospores, x 4^5. 



C. Oogoniom (1) and antheridium (2). x 195. 



D. Oospore (resting-spores). x 196. 



E. Inner membrane of oospore containing zoospores, x 195. 



F. Zoospores, x 405. 



b and /, Zoospores germinating. 



{Magnifications according to Zeiss.) 



already described. It infests the leaves and steins of 

 the host-plant. 



The W^hite Rust of Cabbages {Cystopus candidus, 

 Fig. 47) causes no inconsiderable amount of damage, in 

 certain seasons, to cabbages, cauliflowers, and allied crops. 

 This disease is known by the swollen leaves, stems, etc. 



