THE ^CIDIAL, STAGE OF RUSTS. 



35 



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

 tions of various grain rusts. 



PUCCINIA GRAMINIS TRITICI ON WHEAT. 



Capital letter series. 



Lower-case letter series 



Series 

 letter. 



Date of 

 inocula- 

 tion. 



Number 





of leaves 



Date 



inocu- 



matured. 



lated. 







1907. 



10 



Feb. 19 



10 



Mar. 5 



10 



Mar. 21 



10 



Apr. 8 



3 10 



May 7 



10 



May 27 



10 



June 13 



10 



June 25 



10 



July 8 



10 



July 23 



10 



Aug. 6 



10 



Aug. 21 



10 



Sept. 8 



10 



Sept. 25 



10 



Oct. 8 



7 



Oct. 29 



9 



Nov. 18 



10 



Dec. 10 





1908. 



10 



Jan. 7 



10 



Jan. 25 



10 



Feb. 15 



5 



Mar. 3 



10 



Mar. 19 



10 



Apr. 13 



10 



Apr. 28 



10 



May 13 



10 



May 26 



10 



June 12 



10 



June 25 



10 



July 10 



10 



Julv 28 



10 



Aug. 12 



10 



Sept. 1 



10 



Sept. 17 



10 



Oct. 2 



10 



Oct. 22 



10 



Nov. 6 



10 



Nov. 20 



10, 



Dec. 12 





1909. 



10 



Jan. 10 



10 



Feb. 7 



8 



Feb. 23 



9 



Mar. 14 



10 



Mar. 30 



10 



Apr. 12 



10 



Apr. 27 



4 



May 20 



10 



June 14 



10 



June 2(5 



10 



July 7 



10 



July 21 



10 



Aug. 2 



10 



(10) 



Number 

 of leaves 

 pustuled. 



Series ! P ate ? f 

 letter! mocula " 



Number 

 of leaves 

 inocu- 

 lated. 



Date 

 matured 



Number 

 of leaves 

 pustuled. 



A.. 

 B.. 

 C... 



D2. 



E.. 

 F... 

 G.. 

 H.. 

 I... 

 J... 

 K.. 

 L.. 

 M.. 

 N.. 



6. 

 P... 



Q- 

 R.. 



S. 



T... 

 U... 

 V... 

 W.. 

 X.. 

 Y... 

 Z... 

 AA. 

 BB. 

 CC. 

 DD. 

 EE. 

 FF. 

 GG. 

 HH. 

 II... 

 JJ.. 

 KK. 

 LL. 

 MM. 



NN. 



OO... 

 PP... 

 QQ... 

 RR... 

 SS.... 

 TT... 

 UU... 

 V'V... 

 WW. 

 XX.. 

 YY... 

 ZZ.... 

 AAA. 



1907. 

 Feb. 6 

 Feb. 19 

 Mar. 5 

 Mar. 26 

 Apr. 17 

 May 8 

 May 28 

 June 14 

 June 25 

 July 8 

 July 24 

 Aug. 7 

 Aug. 22 

 Sept. 9 

 Sept. 26 

 Oct. 16 

 Oct. 31 

 Nov. 20 



Dec. 12 



1908. 



Jan. 

 Jan. 

 Feb. 

 Mar. 

 Mar. 

 Apr. 

 Apr. 

 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. 14 

 Apr. 27 

 May 20 

 June 14 

 June 26 

 July 7 

 Julv 21 

 Aug. 2 



U0 



110 



110 



10 



5 



6+5 



6+5 



6+7 



10 



6 



10 



10 



10 



10 



10 



6 



9 



10 



10 



10 



4 



5 



10 



5 



10 



10 



10 



7 



10 



10 



75 



6 



10 

 10 

 10 



( s ) 



(10) 



n H ... 

 JJ--. 

 kk.. 

 11.... 

 mm. 



WW. 



xx. 



yy- 



1907. 

 Feb. 6 

 Feb. 19 

 Mar. 5 

 Mar. 26 

 Apr. 19 

 May 8 

 May 28 

 June 14 

 June 25 

 July 8 

 July 24 

 Aug. 7 

 Aug. 22 

 Sept. 9 

 Sept. 26 

 Oct. 22 

 Nov. 9 

 Nov. 20 



Dec. 12 



1908. 

 Jan. 7 

 Jan. 25 

 Feb. 15 

 Mar. 3 

 Mar. 28 

 Apr. 13 

 Apr. 28 

 May 13 

 May 26 

 June 12 

 June 25 

 July 10 

 July 28 



Sept. 17 

 Oct. 2 

 Oct. 22 

 Nov. 6 

 Nov. 20 



Dec. 12 



1909. 

 Jan. 10 

 Feb. 7 

 Feb. 23 

 Mar. 14 

 Mar. 30 

 Apr. 14 

 Apr. 27 

 May 20 

 June 14 

 June 26 

 July 7 

 July 21 

 Aug 2 



10 



10 

 10 

 10 



4 10 



10 

 10 

 10 



8 

 10 

 10 

 10 

 10 

 10 

 10 



9 

 10 



1907. 

 Feb. 19 

 Mar. 5 

 Mar. 21 

 Apr. 8 

 May 7 

 May 27 

 June 13 

 June 25 

 July 8 

 July 23 

 Aug. 6 

 Aug. 21 

 Sept. 8 

 Sept. 25 

 Oct. 9 

 Nov. 8 

 Dec. 2 

 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 



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 

 Aug. 2 



(10) 



17 



18 



i 10 



10 



9 



5 +5 



5 +5 



5 +7 



8 



4 



10 



10 



10 



10 



10 



(10) 



i Pustules vigorous. 



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



3 Inoculations made from material from dried leaves. 



* Three leaves inoculated from dried material, two from fresh. 



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



e Series sent from Minneapolis, Minn., to Washington, D. C. 



7 Greenhouse excessively hot. 



8 Several. 



9 Inoculated from HH. 



io Expsriment discontinued. 



216 



