364 



Reed: The mildews of the cereals 





TABF.E XII. 



— Rfsults 



WITH 



Horde tan 



Zeocrtton 



L.i 





iber of 

 riment 





1 



M 





ated 



1 



Results 



Date 



Source of conidia 





u,3 







« 











1 





4) ^~' 



°8 



d C 







• 



Date 



Inoc, 



Controls 



Z 8 



i 







tUQ 



S- 









plants 







1908 i 









1908 





77C 



Feb. 10 



Hordenni 



distich on 



9 



4 



3 



Feb, 17 



4 + + 





79a 



'< 10 



a 



a 



9 



4 



2 



<i jj 



+++ 



— 



87a 



*' 22 



€i 



ti 



9 



3 



2 



'* 29 



+++ 



M 



88c 



'* 22 



1907 



4 



a 



9 



5 



3 



«' 29 

 1907 



+++ 





7b 



Dec. 16 



1908 



Hordeum 



71 lid 11 m 



9 



1 



3 



5 



Dec. 23 



1908 



+++ 



^^^^ 



85c 



Feb. 2 1 

 1907 



tt 



i i 



8 



1 



4 



5 



Feb. 29 



1907 



+++ 



^m- ' ' 



2a 



Dec, 9 Ilordeuni 



vtilgme 



8 



2 



4 



Dec. 16 



++i- 





3c 



" 9 



<< 



<c 



8 



4 



4 



*' 16 



+^+ 



1 



4b 



" 9 



(« 



• < 



8 



2 



4 



" 16 



+++• 







8a 



" 16 



ci 



<c 



9 



3 



3 



" 23 



+++ 



1 a 



9b 



" 16 



1 



(( 



« ( 



9 



2 



! 

 1 



2 



" 23 



1908 



+++ 





20c 



" 31 



t( 



ti. 



10 



3 



2 



Jan, 7 



+++ 





2la 



" 31 



(< 



<c 



10 



3 



2 



<< 7 



+++ 



w 



22a 



" 31 



(( 



10 



1 

 1 



2 



2 



tt n 



+++ 





23a 



" 31 



(( 



C( 



10 



2 



2 



tt m 



+++ 





24a 



" 31 



tt 



<c 



10 



2 



2 



tt 7 



+++ 





25a 



1 



^ 1 



C( 



10 



3 



3 



tt *j 



+++ 



— 



1 

 1 



1908 









^ 











47a 



Jan. 18 



«< 



(t 



14 



3 



3 



" 24 ++4- 



+^ 



48b 



" 18 



<< 



<( 



14 



23 



3 



i* 24 ^ + 4- 





65a 



.^^ ^ ^ ^ 



Feb. 3 



<< 



(< 



10 



2 



I 



Feb. 10 +-r + 





68b 



'* 3 



tt 



(C 



10 



I 



I 



** 10 



+++ - 



68c 



'* 3 



tt 



(( 



10 



I 



2 



'' 10 



+++ 



6a 



1007 



Dec. 16 



Hordeum 



Zeocriton 



■1 



9 



3 



2 



1907 

 Dec. 23 



+++ 





42b 



igo8 

 Jan. 17 



I Tritictim 



vtil^are 



13 



3^ 



3 



1908 

 Jan. 24 





i 



* Considered by Hackel to be a form of Hordeum sativum dlstichon, 

 '^ A small infected area on two of the control plants. 

 ^ The second green leaf of each plant inoculated. 



It \s to be noted that In two of my experiments (44^ and 45^, 

 TABLE I), the leaves inoculated with barley mildew showed marked 

 discolored areas. These areas were observed closely from time to 

 time. There was strong evidence of an incipient infection, but the 

 fungus failed to reach a full development. It is interesting in this 

 connection to recall some of Salmon's ^^ experiments. Salmon has 

 studied the stages of development reached by the mildew from 

 wheat when sown on barley, a plant which the wheat mildew cannot 

 fully infect. He has found that the conidia germinate and form 

 tubes which develop haustoria. There was, however, no marked 

 development of the mycelium. 



