38 



THE RUSTS OP 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 SECALIS ON RYE. 



PUCCINIA RUBIGO-VERA TRITICI ON WHEAT. 



A... 

 B.. 

 C... 

 D2. 



E8. 



F.. 

 G.. 

 H.. 

 I... 

 J... 

 K.. 

 L... 

 L... 

 M.. 



N12. 



C. 

 P... 

 Q-- 



R. 



S... 

 T... 

 U... 



V13 



w..' 



X... 



Y... 

 Z... 



A A. 

 BB. 

 CC. 

 DD. 



EE. 

 FF. 

 GG. 



(14) 



1907. 

 Feb. 6 

 Feb. 19 

 Mar. 5 

 Mar. 26 

 Apr. 17 



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 

 Juno 12 

 Jimo 25 

 July 10 

 July 28 

 Aug. 12 

 Sept. 1 



10 

 10 

 10 

 10 



10 

 8 

 " 6 

 5 

 9 

 8 

 7 



10 



10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 6 

 5 

 3 



1907. 

 Feb. 19 

 Mar. 5 

 Mar. 21 

 Apr. 8 



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 



17 



(') 



0) 



10 7 

 

 5 

 5 



(') 



3 



7 

 9 



10 



10 



10 



10 



10 



10 



7 



10 



10 



10 



10 



10 



8 



2 



1 



a.. 



b... 



c. 



dK 



e.. 



f.. 



h... 

 i. . . 



j--- 

 k... 

 1... 

 1... 

 m. . 

 ni2. 



o... 

 p... 

 q... 



s... 

 t... 

 u.. . 



V '3. 

 w. . 

 .x 



y... 

 z. .. 



bb. 

 cc. 

 dd. 

 ee.. 

 ff... 



(H) 



10 

 10 

 10 

 10 



37 



10 



9 



10 



10 



10 



10 



10 



"6 



9 



10 



8 



10 



10 



10 



10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 



7 

 10 

 10 

 10 



9 



Pustules \igorous. 



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



Inoculations made from material from dried leaves. 



Several. 



Very hot when inoculations were made, hence no infection. 



Not sucfRssive to preceding inoculations: material obtained directly from the field. 



Failure due to extreme heat in greenhouse. 



Material from D destroyed in transit. 



i'lus sign signifuw "more than;" i. e., exact number of leaves pusttiled not noted. 



Inoculalions itiadi^ from j. 



Inoculations mado from K and k. 



Series sent from Minneapolis, Minn., to Washington, D. C, Oct«ber 8, 1907. 



Series sent from Wasliington, I). ('., to Minneapolis, Minn., March 19, 1908. 



Letters 1111 jind hh were omitted in the series. 



0) 



J 10 



18 



7 



7 



9+5 



9-)-5 



9+5 



3 

 10 

 10 

 

 5 

 9 



{') 



0) 



8 



iq 

 10 



10 



10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 10 

 7 



10 



216 



