THE ^CIDIAL STAGE OE RUSTS. 



37 



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

 tions of various grain rusts — Continued. 



PUCCINIA GRAMINIS HORDEI ON BARLEY. 



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. 





1907. 





1907. 







1907. 





1907. 





A 



Feb. 6 

 Feb. 19 

 Mar. 5 

 Mar. 25 



10 

 10 

 10 



7 



Feb. 19 

 Mar. 5 

 Mar. 25 

 Apr. 4 



1 7 

 10 

 10 

 6 



a 



b 



c 



d2 



Feb. 6 

 Feb. 19 

 Mar. 5 

 Mar. 25 



10 

 10 

 10 

 10 



Feb. 19 



Mar. 5 

 Mar. 25 

 Apr. 4 



8 



B 



8 



C 



10 



D2 



10 



E 



Apr. 17 



3 10 



May 7 



7 



e 



Apr. 17 



7 



Mav 7 



8 



F 



May 7 

 May 26 



10 

 8 



May 25 

 June 13 



10 

 H-5 



f 



g 



Mav 7 

 May 26 



10 

 8 



May 25 

 June 13 



10 



G 



4+5 



H 



June 14 



10 



June 25 



4 +5 



n 



June 14 



10 



June 25 



4 +5 



I 



June 26 



10 



July 9 



5 2 



l 



June 26 



9 



Julv 9 



68 



J... 



July 10 

 July 22 



5 



July 21 

 Aug. 6 



3 





July 10 



9 



Julv 21 



7 



K 



10 



10 



k 



July 22 



10 



Aug. 6 



10 



L 



Aug. 7 



10 



Aug. 21 



10 



1 



Aug. 7 



10 



Aug. 21 



10 



M 



Aug. 22 



10 



Sept. 8 



10 



rn 



Aug. 22 



10 



Sept. 8 



10 



N 



Sept. 9 



10 



Sept. 25 



10 



n 



Sept. 9 



10 



Sept. 25 



10 



07 



Sept. 26 



10 



Oct. 8 



( 8 ) 



O ' 



Sept, 26 



10 



Oct. 8 



( s ) 



P 



Oct. 22 

 Nov. 9 



11 



10 



Nov. 8 

 Nov. 20 



11 

 10 



P 



<1 



Oct. 16 

 Oct. 31 



9 



7 



Oct. 29 

 Nov. 18 



9 



Q 



7 



R 



Nov. 20 



9 



Dec. 10 



1908. 



5 



r 



Nov. 20 



9 



Dec. 10 



1908. 



8 



S 



Dec. 12 



10 



Jan. 7 



10 



s 



Dec. 12 



10 



Jan. 7 



10 





1908. 











1908. 









T 



Jan. 7 

 Jan. 25 



10 

 10 



Jan. 25 

 Feb. 15 



9 10 



10 8 



t 



u 



Jan. 7 

 Jan. 25 



10 

 10 



Jan. 25 

 Feb. 15 



ioiO 



U 



9 



V 



Feb. 15 



10 



Mar. 3 



10 



V 



Feb. 15 



10 



Mar. 3 



10 



wn 



Mar. 3 



10 



Mar. 19 



10 



W 11 



Mar. 3 



10 



Mar. 19 



10 



X 



Mar. 27 



10 



Apr. 13 



7 



X 



Mar. 27 



10 



Apr. 13 



6 



Y 



Apr. 13 



10 



Apr. 28 

 May 13 



4 



y 



Apr. 13 



10 



Apr. 28 



3 



z 



Apr. 28 

 May 13 



10 



10 



z 



Apr. 28 



10 



May 13 



5 



AA 



10 



May 26 



8 



aa 



May 13 



6 



Mav 26 



5 



BB 



May 26 



10 



June 12 



8 



bb 



May 26 



10 



June 12 



5 



CC 



June 18 



10 



Julv 10 



12 



cc 



June 18 



10 



July 10 



1 













dd 



Julv 10 



7 



Julv 28 



3 













ee 



July 28 



7 



Aug. 12 



1 













ff 



Aug. 12 



10 



Sept. 1 



8 













gg 



Sept. 1 



10 



Sept. 17 



( s ) 



HH 



Sept, 17 



10 



Oct. 2 



13 10 



hh 



Sept, 17 



10 



Oct. 2 



8 



II 



Oct. 2 



10 



Oct. 22 



10 



n 



Oct. 2 



10 



Oct. 22 



10 



JJ 



Oct. 22 



10 



Nov. 6 



10 



J.1 



Oct. 22 



10 



Nov. 6 



10 



KK 



Nov. 6 



10 



Nov. 20 



10 



kk 



Nov. 6 



10 



Nov. 20 



10 



LL 



Nov. 20 



10 



Dec. 12 



1909. 



8 



11 



Nov. 20 



10 



Dec. 12 

 1909. 



8 



MM 



Dec. 12 

 1909. 



10 



Jan. 10 



9 



mm 



Dec. 12 

 1909. 



8 



Jan. 10 



5 



NN 



Jan. 10 



5 



Feb. 7 



1 



nn 



Jan. 10 



10 



Feb. 7 



3 



00 



Feb. 22 



5 



Mar. 14 



3 



00 



Feb. 22 



6 



Mar. 14 



2 



PP 



Mar. 14 



10 



Mar. 30 



10 



pp. 



Mar. 14 



10 



Mar. 30 



10 



QQ 



Mar. 30 



10 



Apr. 12 



9 



qq 



Mar. 30 



10 



Apr. 14 



6 



RR 



Apr. 12 



10 



Apr. 27 

 May 20 



10 



rr 



Apr. 12 



10 



Apr. 27 



10 



SS 



Apr. 27 



10 



7 



ss 



Apr. 27 



4 



Mav 20 



4 



TT 



Mav 20 



8 



June 14 



7 



tt 



May 20 



10 



June 14 



9 



UU 



June 14 



10 



June 26 



8 



UU 



June 14 



10 



June 26 



8 



W 



June 26 



10 



July 7 



10 



vv 



June 26 



10 



July 7 



10 



WW 



July 7 



10 



July 21 



7 



WW 



July 7 



10 



July 21 



10 



XX 



Julv 21 



10 



Aug. 2 



10 



XX 



July 21 



10 



Aug. 2 



10 



YY 



Aug. 2 



10 



(") 



(14) 



yy 



Aug. 2 



10 



(14) 



(14) 



i Pustules vigorous. 



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



3 Three inoculations were made from material from dried leaves, 7 from fresh material shipped in pots. 



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

 s Slugs destroyed 8 plants. 



6 Slugs destroyed 1 plant. 



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



8 Several. 



9 Pustules not as vigorous as usual. 

 i° Pustules not vigorous. 



n Series transferred from Washington, D. C, to Minneapolis, Minn., March 19, 1908. 



12 Failure due to extreme heat in greenhouse. 



13 Inoculated fromgg. 



" Experiment discontinued. 



216 



