38 



THE BUSTS 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 GRAMLNIS SECALIS ON RYE. 



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 



B 



1907. 

 Feb. 6 

 Feb. 19 

 Mar. 5 

 Apr. 4 

 Apr. 17 

 May 8 

 May 27 

 June 14 



1909. 

 Julv 7 

 July 21 

 Aug. 2 



10 

 10 

 10 

 4 



10 

 6 

 5 

 4 



10 

 10 

 10 



1907. * 

 Feb. 19 

 Mar. 5 

 •Mar. 25 

 Apr. 8 

 May 7 

 May 26 

 June 13 

 June 26 



1909. 

 July 21 

 Aug. 2 



17 

 4 

 8 

 8 

 4 



( 4 ) 



( 4 ) 



50 



10 

 8 



( 7 ) 



a 



b 



c 



d2 



e 



f 



fc:::::; 



aa« 



bb 



cc 



1907. 

 Feb. 6 

 Feb. 19 

 Mar. 5 

 Mar. 25 

 Apr. 17 

 May 8 

 May 27 

 June 14 



1909. 

 July 7 

 July 21 

 Aug. 2 



10 



10 



10 



5 



39 



10 



6 



9 



10 

 10 



10 



1907. 

 Feb. 19 

 Mar. 5 

 Mar. 25 

 Apr. 8 

 May 7 

 May 26 

 June 13 

 June 26 



1909. 

 July 21 

 Aug. 2 



4 



4 



C 



5 



D2 



E 



3 



2 



F 



( 4 ) 

 <«) 



60 



10 



8 

 ( 7 ) 



G 



H 



AA6 



BB 



CC 









PUCCINIA RUBIGO-VERA TRITICI ON WHEAT. 



A 



1907. 

 Feb. 6 

 Feb. 19 

 Mar. 5 

 Mar. 26 

 Apr. 17 



10 

 10 

 10 

 10 



1907. 

 Feb. 19 

 Mar. 5 

 Mar. 21 

 Apr. 8 



17 

 8 

 ( 4 ) 







a 



b 



c 



d2 



e 



1907. 

 Feb. 6 

 Feb. 19 

 Mar. 5 

 Mar. 26 

 Apr. 17 

 May 8 

 May 29 

 June 14 

 June 27 

 July 10 

 July 24 

 Aug. 9 

 Aug. 22 

 Sept. 11 

 Sept. 28 

 Oct. 16 

 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. 12 

 Sept. 1 



10 

 10 

 10 

 10 

 37 



10 

 9 

 10 

 10 

 10 

 10 

 10 

 11 6 

 9 

 10 

 8 

 10 

 10 



10 



10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 



7 

 10 

 10 

 10 



9 



1907. 

 Feb. 19 

 Mar. 5 

 Mar. 21 

 Apr. 8 

 May 7 

 May 28 

 June 13 

 June 26 

 July 9 

 July 23 

 Aug. 8 

 Aug. 21 

 Sept. 10 

 Sept. 27 

 Oct. 8 

 Oct. 29 

 Nov. 18 

 Dec. 10 



1908. 

 Jan. 7 



Jan. 25 

 Feb. 15 

 Mar. 3 

 Mar. 19 

 Apr. 13 

 Apr. 28 

 May 13 

 May 26 

 June 12 

 June 25 

 July 10 

 July 28 

 Aug. 12 

 Sept. 1 

 Sept. 17 



UO 



B 



C 



18 

 ( 4 ) 



7 

 7 



D2 



E8 . 



F 









f 



I.::::::: 



j 



9+5 



G.. . 











9+5 



H 











9+5 



I 











3 



J..... 











10 



K 



L 



July 24 

 Aug. 9 

 Aug. 22 

 Sept. 11 

 Sept. 28 

 Oct. 24 

 Nov. 9 

 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. 12 

 Sept. 1 



10 



8 

 11 6 

 5 

 9 

 8 

 7 

 9 



10 



10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 6 

 5 

 3 



Aug. 8 

 Aug. 21 

 Sept. 10 

 Sept. 27 

 Oct. 8 

 Nov. 8 

 Nov. 20 

 Dec. 10 



1908. 

 Jan. 7 



Jan. 25 

 Feb. 15 

 Mar. 3 

 Mar. 19 

 Apr. 13 

 Apr. 28 

 May 13 

 May 26 

 June 12 

 June 25 

 July 10 

 July 28 

 Aug. 12 

 Sept. 1 

 Sept. 17 



107 

 

 5 

 5 

 ( 4 ) 

 3 

 7 

 9 



10 



10 

 10 

 10 

 10 

 10 

 7 



10 

 10 

 10 

 10 

 10 

 8 

 2 

 1 

 ( 4 ) 



k 



1 



1 



m 



ni2 







P 



q 



r 



s 



t 



u 



V 13 



\V 



X 



y 



z 



aa 



bb 



cc 



dd 



ee 



ff 



gg 



(14) 



10 

 



L 



5 



M 



Ni2 



O 



P., 



9 

 ( 4 ) 



8 

 10 



Q 



R 



S. . 



10 

 10 

 10 



T 



10 



U 



V 13 



w. '.".... 



X 



Y 



Z 



10 

 10 

 10 

 10 

 10 

 10 



AA 



BB 



CC 



DD 



EE 



FF 



GG 



(14) 



10 

 10 



7 



10 

 5 

 7 

 ( 4 ) 



1 Pustules vigorous. 



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



3 Inoculations made from material from dried leaves. 

 * Several. 



5 Very hot when inoculations were made, hence no infection. 



6 Not successive to preceding inoculations; material obtained directly from the field. 



7 Failure due to extreme beat in greenhouse. 



8 Material from D destroyed in transit. 



9 Plus sign signifies "more than;" i. e., exact number of leaves pustuled not noted. 

 i° Inoculations made from j. 



11 Inoculations made from K and k. 



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



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



14 Letters HH and hh were omitted in the series. 



216 



