36 



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 GRAMINIS AVENAE ON OATS. 



Capital letter series. 



Lower-case letter series. 



Series 

 letter. 



Date of 

 inocula- 

 tion. 



Number 

 of leaves 

 inocu- 

 lated. 



Date 

 matured. 



Number 

 of leaves 

 pustuled. 



Series 

 letter. 



Date of 

 inocula- 

 tion. 



Number 

 of leaves 

 inocu- 

 lated. 



Date 

 matured 



Number 

 of leaves 

 pustuled. 



A.. 

 R.. 

 C 

 Da. 

 E.. 

 F... 

 G.. 

 EL. 

 I... 

 J.. 

 K.. 

 L... 

 M.. 

 N.. 



09 

 P... 



Q- 

 R.. 



T.... 

 U.... 

 V.... 



W". 

 X... 

 Y.... 

 Z.... 

 AA.. 

 BB.. 

 CO... 

 DD.. 

 EE.. 

 FF.. 

 GG.. 



HH. 

 II.. 

 JJ.. 

 KK. 

 LL. 



MM. 



NN.. 

 00.. 

 PP.. 

 QQ-. 

 RR.. 

 SS... 

 TT.. 

 UU.. 

 W.. 

 WW. 

 XX. 

 YY.. 



1907. 

 Feb. 6 

 Feb. 19 

 Mar. 5 

 Mar. 25 

 Apr. 17 

 May 8 

 May 27 

 June 11 

 June 24 

 July 8 

 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 26 

 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 26 

 July 7 

 July 21 



10 

 Ki 

 10 

 L0 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 9 

 144 



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. 18 

 Dec. 10 



1908. 

 Jan. 7 



Jan. 25 

 Feb. 15 

 Mar. 3 

 Mar. 19 

 Apr. 12 

 Apr. 28 

 May 13 

 May 26 

 June 12 

 June 25 

 July 10 

 July 28 

 Aug. 12 



Oct. 2 



Oct. 22 



Nov. 6 



Nov. 20 



Dec. 12 



1909. 



Jan. 10 



Feb. 

 Feb. 

 Mar. 



Mar. 30 

 Apr. 12 

 Apr. 27 

 May 20 

 June 14 

 June 26 

 July 7 

 July 21 



(17) 



20 



39 



9 



6 10 



10 

 10 

 10 

 10 

 M 



»10 



10 

 10 

 10 



(10) 



16 10 



10 

 10 



(17) 



a 



b.„. 



c 



d*.. 



e 



f.... 

 g~- 

 h.... 



i 



j.--. 

 k..., 

 1... 

 m. . 

 n.... 

 o 9 .., 

 p.... 

 q... 

 r.. . 



s... 



t... 

 u... 

 v.... 

 wn 



X... 



y— . 



z... 

 aa... 

 bb. 

 cc. . 

 dd. 

 ee. . 

 ff... 

 gg— 

 gg— 

 hti. 

 ii... 

 jj— 

 kk. 

 11... 



mm 



nn. 

 oo.. 

 pp. 

 q.. 

 rr.., 

 ss... 

 tt... 



UU., 



w., 



w. 



XX., 



yy- 



1907. 

 Feb. 6 

 Feb. 19 

 Mar. 5 

 Mar. 25 

 Apr. 17 

 May 8 

 May 27 

 June 11 

 June 24 

 July 8 

 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 26 

 June 12 

 June 25 

 July 10 

 July 28 

 Aug. 12 

 Sept. 1 

 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 26 

 July 7 

 July 21 



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. 18 

 Dec. 10 



1908. 

 Jan. 7 



Jan. 25 



Feb. 15 

 Mar. 3 

 Mar. 19 

 Apr. 12 

 Apr. 28 

 May 13 

 May 26 

 June 12 

 June 25 

 July 10 

 July 28 

 Aug. 12 

 Sept. 1 

 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 26 

 July 7 

 Julv 21 



(17) 



(10) 



14 



1 2 

 49 



7 



69 



10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 



10 



10 



(15) 



10 



10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 



13 



3 



10 



JO 



(17) 



1 Pustules vigorous. 



2 Accidental infection by Puccinia coronata; plants discarded. 



3 Slightly mixed with Puccini coronata. 



4 Mixed with Puccinia coronata. 



5 Series sent from Washington, D. C, to Minneapolis, Minn., April 8, 1907. 



6 Inoculations made from material from dried leaves. 



7 Badly mixed with Puccinia coronata. 



8 Inoculations made from j. 



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



10 Several. 



11 Series sent from Washington, D. C, to Minneapolis, Minn., March 19, 1908. 



12 Failure due to extreme heat in greenhouse. 



13 Five leaves pustuled with Puccinia coronata, accidental infection. Failure of Puccinia graminis due 

 to extreme heat in greenhouse. 



» Inoculated from EE. 



15 Not recorded. 



is Inoculated from gg. 



I? Experiment discontinued. 



216 



