PHOMA 



409 



Phoma solani (Halsted) causes a 'damping off' of egg- 

 plants. The disease attacks the seedlings at the base of the 

 stem, the fruit of the fungus appearing as exceedingly minute 

 dots on the diseased part. 



Halsted, New Jersey Agric. Exp. Sta. Rep., 1891. 





Fig. 127. Phoma sanguinolenta. i, diseased carrot ; 

 2, diseased carrot flowering stem ; 3, portion of a 

 diseased spot showing penthecia with the conidia 

 escaping as a viscid tendril ; 4, section of a perithecium 

 with the conidia oozing out in a tendril. Figs. 1 and 2 

 reduced ; remainder mag. 



Phoma solanicola (Prill, and Del.) attacks the haulm of the 

 potato, forming large, oblong, whitish or clear yellow spots, 

 which eventually become dotted over with the minute, 

 blackish perithecia of the fungus. When the lateral branches 

 are attacked the leaves soon wither, and when several 

 branches are attacked the plant does not obtain the required 



