Diseases of Plants 



materials. Their growth is 

 favored by an abundance 

 of moisture and warmth. 



The prevention of damp- 

 ing off depends largely on 

 the use of proper methods in 

 growing seedlings. Do not 

 use soil so rich that the plants 

 are forced too rapidly. Give 

 the seedlings space, both by 

 proper sowing and by prompt 

 thinning and transplanting. 

 Supply water only according 

 to the needs of the plants; 

 mix sand with the soil to 

 help the drainage ; regulate 

 the temperature and venti- 

 late the frames to harden 

 the seedlings. With such 

 precautions, damping off will 



Seldom be SerioUS. 



R. F. Poole, N. J. Expt. Sta. 



If it TIG. 169. Portion of a corn plant 

 badly infected with corn smut. The 

 diseased parts or the entire diseased 



anr>psrQin flat* HkrarH the badly infected with corn smut. The 

 natS > a ' diseased parts or the entire di 



entire flat and plant new plants should be cut off and de- 

 seeds in less rich soil, or 



select healthy plants from uninfected parts of the flat 

 and transplant them to a new flat with fresh earth less 

 rich in humus. 



CORN SMUT 



One can readily detect the presence of this fungus, be- 

 cause of the prominent and sometimes enormous swell- 



