PLATE XLV 



Fig. I. — Potato tubers showing shriveling and a silvery appearance caused by 

 Spondylocladium atrovirens. 



Fig. 2. — Tuber nattu"ally infected by 5. atrovirens, showing the segregated area 

 type of infection, a condition developing in some cases later in the storage season. 



Fig. 3. — Immature potato tuber artificially inoculated with conidia of 5. atrovirens, 

 July, 1913, at Houlton, Me. Infected area covered with dark-brown tufts of 

 conidiophores and conidia. Infection was effected in a moist chamber at room 

 temperature. 



