42 



THE RUSTS OF GRAINS IK THE UNITED STATES. 



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

 tions of various grain rusts — Continued. 



PUCCINIA RUBIGO-VERA SECALIS ON RYE— Continued. 



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. 



EE 



FF 



GG 



1908. 

 July 10 

 July 28 

 Aug. 13 

 Sept. 1 

 Sept. 17 

 Oct. 2 

 Oct. 22 

 Nov. 6 

 Nov. 20 



Sec. 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 



6 

 9 

 8 

 10 

 10 

 10 

 10 

 8 

 7 



10 



7 



10 

 10 

 10 

 10 

 10 

 10 

 10 



8 

 10 

 10 

 10 



1908. 

 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 

 ( 4 ) 



6 

 i 1 



5 

 ( 2 ) 

 10 

 10 

 10 



8 



4 



8 



4 

 10 

 10 

 10 

 10 

 10 

 10 

 10 



8 

 10 



9 



ee 



ff 



gg 



1908. 

 July 10 

 July 28 



4 

 6 



1908. 

 July 28 

 Aug. 12 



4 

 i 



HH 



II 



JJ 



KK 



LL 



MM 



NN 



00 



PP 



QQ 



RR 



SS 



TT 



UU 



VV....... 



WW 



XX 



YY 



ZZ 



hi 



ii 



JJ 



kk 



11 



mm 



nn 



00 



PP 



qq 



rr 



ss 



tt 



UU 



VV 



WW 



XX 



yy 



ZZ 



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 



39 



10 

 10 

 10 

 10 

 9 



10 



10 

 8 

 10 

 10 

 10 

 10 

 10 

 10 

 8 

 10 

 10 

 8 



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 



( 2 ) 

 10 

 10 

 10 

 10 

 9 



10 



5 



8 

 10 

 10 

 10 

 10 

 10 

 10 



8 

 10 



8 

 ( 4 ) 



PUCCINIA GRAMINIS TRITICI ON BARLEY FROM WHEATS 



Original inoculation made Nov. 13, 1906. 



Original inoculation made Nov. 22, 1906. 



Date of inocu- 

 lation. 



Number 

 of leaves 

 inocu- 

 lated. 



Date 

 matured. 



Number 

 of leaves 

 pustuled. 



Date of inocu- 

 lation. 



Number 

 of leaves 

 inocu- 

 lated. 



Date 



matured. 



Number 

 of leaves 

 pustuled. 



1907. 

 Apr. 17 



10 

 10 

 10 

 10 

 10 

 10 

 9 

 8 

 8 

 10 

 10 

 9 

 10 

 10 



6 



97 



1907. 



May 7. 



May 29 



June 11 



June 26 



July8 



Julv21 



Aug. 6 



Aug. 21 



Sept. 8 



Sept. 25 



Oct. 8 7 



Oct. 29 



Nov. 18 



Dec. 10 



1908. 

 Jan. 8 



Mar. 3 



68 



10 



10 



10 



6 



6 



8 



8 



8 



10 



10 



9 



10 



10 



6 



7 



1907. 



Apr. 17 



May8 



May 27. 



June 11 



June 26 



July 8 



July 22 



Aug. 7 



Aug. 22 



Sept. 9 



1907. 



10 J May 7 



10 I May 26 



10 June 11 



10 June 26 



10 i July 8 



10 ! Julv21 



10 | Aug. 6 



10 ! Auer. 21 



6 10 



10 



May 29 



June 11 



June 26 



July 8 



10 

 10 

 10 

 10 



July 22 



Aug. 7 



10 

 10 



Aug. 22 



Sept. 9 



Sept. 26 



10 

 10 . 



Sept. 8 



Sept. 25 



10 

 10 



Oct. 17 



Oct. 31 



Oct. 17 



Oct. 31 



Nov. 20 



Dec. 12 



1908. 

 Feb. 15 



84 

 10 

 10 



6 



96 



Oct. 29 



Nov. 18 



Dec. 10 



1908. 

 Jan 8 



3 



10 



Nov. 20 



Dec. 12 



10 

 6 



1908. 

 Feb. 15 



Mar. 3 



6 



1 Extreme heat in greenhouse. 



2 Several. 



3 Inoculations made from GG. 

 * Experiments discontinued. 



5 The original material was obtained from wheat November 13 and 22, 1906. It was transferred to barley 

 and was kept on barley continuously from that time. Notes on the inoculations from November 13 and 

 22, respectively, to March 30, 1907, have been mislaid or lost; but six series of successful inoculations were 

 made in each case at Washington, D. C, and on March 30 the successfully inoculated plants were sent to 

 Minnesota. The table gives the results from inoculations from this material, beginning with April 17, 1907. 



6 Pustules vigorous. 



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



8 Inoculations made from material pustuled September 25, 1907. 



9 Inoculations made from material pustuled January 8, 1908. 



216 



