'558 Journal of Agricultural Research voi. xv, no. 10 



25) Spaulding, Perley. 



1907. A BUGHT disease; OP YOUNG CONIFERS. In Science, n. s. v. 26, no. 659, 

 p. 220-221. 



(26) 



1914. THE DAMPiNG-OFP OF CONIFEROUS SEEDLINGS. In Phytopathology, v. 4, 

 no. 2, p. 73-88, 2 fig., pi. 6. Bibliography, p. 85-87. 



(27) TuBEuF, C. von. 



1901. FusoMA-iNPEKTiONEN. In Aih. Biol. Abt. Land u. Fosrtw., Bd. 2, 

 Heft I, p. 167-168, 2 fig. 



(28) 



1914. HITZETOT UND EiNSCHNURUNGSKRANKHElTEN DER PPLANZEN. In 



Nattirw. Ztschr. Forst u. Landw., Jahrg. 12, Heft i, p. 19-36, 4 fig. 



PLATE B 



1. Noi-mal damping-off on western yellow pine; caused usually by Corticiumvagum, 

 Fusarium spp., or Pythium debarymiuni. Natural size. 



2, 3. Blacktop damping-off on jack pine; probably caused by Trichoderma sp. X 2. 

 = location of surface of soil. 



4. Whitespot injury, common type, on western yellow pine; usually due to ex- 

 cessive heat at soil siuiace. Natural size. 



5. Whitespot lesion, one-sided type, on western yellow pine; due to heat. Natural 

 size. 



6. Late damping-off resulting from inoculation with Pythium debaryanuni on red 

 pine more than 5 weeks old. X iK- = location of surface of soil. 



7. Wind injury to jack pine. This seedling had fallen over and was propped up 

 for drawing purposes. X 2 . 



Drawn by Maybell S. Hartley. 



