36 



THE EUSTS 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 GRAMINIS AVENAE ON OATS. 



Capital letter series. 



Series 

 letter. 



A 



n 



c 



D6 



E 



F 



G 



H 



I 



J 



K 



L 



M 



N 



09 



P 



Q 



R 



T.... 

 U.... 



v.... 



Wii. 

 X... 

 Y.... 

 Z... 

 AA.. 

 BB.. 

 CC... 

 DD.. 

 EE.. 

 FF.. 

 GG.. 



MM. 



NN.. 

 00.. 

 PP.. 

 QQ- 

 RR.. 

 SS... 

 TT.. 

 UU.. 

 VV.. 

 WW. 

 XX. 

 YY.. 



Date of 



inociila- 



tiou. 



Number 

 of leaves 

 inocu- 

 lated. 



HH 



II 



JJ 



KK 



LL 



1907. 

 Feb. li 

 Feb. 19 

 Mar. 5 

 Mar. 25 

 Apr. 17 

 May 8 

 May 27 

 June 11 

 Jinie 24 

 July S 

 July 22 

 Aug. 7 

 Aug. 22 

 Sept. 9 

 Sept. 26 

 Oct. 17 

 Oct. 31 

 Nov. 20 



Dec. 12 



1908. 

 Jan. 7 

 Jan. 25 

 Feb. 15 

 Mar. .3 

 Mar. 30 

 Apr. 12 

 Apr. 28 

 May 13 

 May 2(i 

 June 12 

 June 25 

 July 10 

 July 28 

 Aug. 13 



Sept. 17 

 Oct. 2 

 Oct. 22 

 Nov. 6 

 Nov. 20 



Dec. 12 



1909. 

 Jan. 10 

 Feb. 7 

 Feb. 23 

 Mar. 14 

 Mar. 30 

 Apr. 12 

 Apr. 27 

 May 20 

 June 14 

 June 2{') 

 July 7 

 July 21 



10 

 9 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 



10 



10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 9 



H4 



10 

 10 

 10 

 10 

 10 



10 



9 

 10 

 10 

 10 

 10 

 10 



9 

 10 

 10 

 10 

 10 

 10 



Date 

 matured 



1907. 

 Feb. 19 

 Mar. 5 

 Mar. 25 

 Apr. 4 

 May 7 

 May 26 

 June 10 

 June 23 

 July 8 

 July 21 

 Aug. 6 

 Aug. 21 

 Sept. 8 

 Sept. 25 

 Oct. 8 

 Oct. 29 

 Nov. IS 

 Dec. 10 



1908. 

 Jan. 7 



Jan. 25 

 Feb. 15 

 Mar. 3 

 Mar. 19 

 Apr. 12 

 Apr. 28 

 May 13 

 May 26 

 Juiie 12 

 June 25 

 July 10 

 July 28 

 Aug. 12 



Oct. 2 

 Oct. 22 

 Nov. 6 

 Nov. 20 

 Dec. 12 



1909. 

 Jan. 10 



Feb. 7 

 Feb. 23 

 Mar. 14 

 Mar. 30 

 Apr. 12 

 Apr. 27 

 May 20 

 June 14 

 Jime 26 

 July 7 

 July 21 

 (") 



Number 

 of leaves 

 pustuled. 



19 



20 

 39 



9 



6 10 



10 

 10 

 10 

 10 

 M 

 8 10 

 10 

 10 

 10 



(10) 



10 



10 



9 



10 



10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 



12 



16 10 



10 



10 



9 



9 



9 



5 

 10 

 10 

 10 



8 

 10 



9 



10 

 10 

 10 

 10 



(") 



Lower-case letter series. 



Series 

 letter. 



a... 

 b... 

 c... 

 d^.. 

 e... 

 f... 

 g-- 

 h... 



i 



i... 

 k... 

 1... 

 m. . 

 n... 



9.. 



p... 

 q... 

 r... 



s... 



t... 

 u... 

 y... 

 wii 



X... 



y--- 



z. . . 

 aa.. 

 bb. 

 cc. . 

 dd. 

 ee. . 

 ff... 

 gg- 

 gg-- 

 hb. 

 ii... 



jj--- 



kk. 

 11... 



mm 



nn. 



00.. 



pp. 

 q.. 

 rr.., 



SS... 



tt... 

 uu.. 



VV.. 

 WW . 

 XX. . 



yy-- 



Number 

 of leaves 

 pustuled. 



('") 



CO 



1 4 



1 2 



<9 



7 



69 



10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 



10 



10 



8 



10 



10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 



13 



3 



10 



10 



9 



9 



9 



4 

 10 

 10 

 10 



5 

 10 



9 



10 

 10 

 10 

 10 



(.7) 



' Pustules vigorous. 



2.\ccidental inft^clion by Puccinia coronata: plants discarded. 



3 Slightly mixed with Puccini coronata. 



* Mixed with J'uccinia coronata. 



s Series sent from Wa.sliington, D. C, to Minneapolis, Minn., .\.pril 8, 1907. 



6 Inoculations made from material from dried leaves. 



' IJadly mixed with Puccinia coronata. 



8 Inoculations made from j. 



9 Series .sent from Minneapolis, Minn., to Washington, D. C, October 8, 1907. 

 •0 Several. 



"Series sent from Washington, D. 0., to Minneapolis, Minn., March 19, 1908. 

 12 Failure due to extreme lieat in greenhouse. 



" Five leaves pustuled with Puccinia coronata, accidental infection. Failure of Puccinia graminis duo 

 to extreme heat in greenhouse. 

 " Inoculated from EE. 

 '5 Not recorded. 

 16 Inoculated from gg. 

 " Experiment discontinued. 



216 



