New York Agricultural Experiment Station. 257 



Fig. 9. (Plate VIII) — Pycnidia of Cryptosporella viticola. 



A. On Concord cane. 



(No. 3232. Lamberton, N. Y. Aug. 10, 1909.) 



B. On Niagara trunk. 



No. 3225. Romulus, N. Y. June 9, 1909.) 



C. On Worcien cutting, causing its death. 

 (Twice natural size. Photograph made July 10, 1910.) 



D. On Concord arm. 



(No. 2983. Westfield, N. Y. Collected and photographed May 1, 1904, by H. H 



Whetzel.) 



Fig. 10. (Plate IX) — Photomicrograph of Pycnidia on Trunk of Concord 

 Vine Showing Relative Position. 

 The cavity in such pycnidia is usually much convoluted. 



Fig. 11. (Plate IX) — Photomicrograph of Three Pycnidia in a R,otten Berry 

 Showing Relative Position. 

 Pycnidia on the fruit are usually simple. 



Fig. 12. (Plate IX) — Drawing of Cross-section of Simple Pycnidium from 

 Fruit of Niagara Grape. 

 Spore-bearing area only partially filled in. Both pycnospores and scoleco- 

 spores are shown. 

 (Outlined with aid of camera lucida from stained section, by C. T. Gregory.) 



Fig. 13. (Plate X) — Artificial Infection on Trunk of Worden Vine. 



Inoculation made July 12, 1909. Point of inoculation may be seen 



near margin. 

 Infection has occurred but fungus has not spread rapidly. 

 (No. 3229. Photograph made July 19, 1910.) 



Fig. 14. (Plate X) — Artificial Infection on Cane of Worden Vine. 

 Inoculation made July 9, 1909. 

 (No. 3216. Photograph made Sept. 24, 1710.) 



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