40 



THE RUSTS OF GRAINS IN THE UNITED STATES. 



Table III. — Summary of experiments to determine the vitality of successive uredo genera- 

 tions of various grain rusts — Continued. 



PUCCINIA SIMPLEX ON BARLEY-Continued. 



PUCCINIA CORONATA ON OATS. 



A.. 

 B.. 

 C... 

 D3. 

 E... 

 F... 

 G.. 

 H.. 

 I... 

 J... 

 K.. 

 L... 

 M.. 

 N.. 

 Qs. 

 P... 

 Q.. 

 R.. 



S... 



T... 

 U.. 

 V... 



W3 



X.. 



Y.. 

 Z... 

 AA. 

 BB. 

 CC. 

 DD 

 EE. 

 FF. 

 GG. 



29 



9 

 9 

 10 

 10 

 10 

 8 

 10 

 10 

 10 

 10 

 10 



(.') 



10 



8 



10 



9 



10 



10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 8 

 10 



a... 

 b.. 

 c... 



d3. 

 e... 

 f... 



10 m. 



n.. 

 qs. 

 p.. 

 q.. 

 r.. 



t... 

 u... 

 v. . 



W3. 

 X. . 



y--- 



z. .. 



aa.. 

 bb. 

 cc. 

 dd. 

 ee.. 

 ff... 

 gg-- 



1907. 

 Feb. 6 

 Feb. 19 

 Mar. 5 

 Mar. 21 

 Apr. 17 

 May 8 

 May 27 

 June 11 

 Jime 24 

 July 8 

 July 24 

 Aug. 9 

 Aug. 24 

 Sept. 11 

 Sept. 28 

 Oct. 17 

 Oct. 31 

 Nov. 20 



Dec. 12 



1908. 

 Jan. 7 

 Jan. 25 

 Feb. 15 

 Mar. 3 

 Mar. 30 

 Apr. 13 

 Apr. 28 

 May 13 

 May 26 

 June 12 

 June 25 

 July 10 

 July 28 

 Aug. 13 



1 Experiments discontinued. 



2 Pustules vigorous. 



3 Series sent from Washington, D. C, to Minneapolis, Minn. 

 * Inoculations made from muUjrial from dried loaves. 



'^ Series sent from Minneapolis, Miim., to Wasliington, D. C. 

 « Several. 



216 



