Reed : The mildews of the cereals 



361 



TABLE IX.— Results with Hordeta?i tetrastichon\^} 



a 



C 



S 



u 

 V 



P. 



M 



Date 



Source of conidia 



130b 

 172a 

 173b 



174a 

 175c 

 178a 

 1 80b 





o u 



2;- 



i2 



o 



c 

 o 



Results 



1908 



Oct, 



19 



Nov. 



20 





20 





20 





27 





27 





27 



Ilordeufu vtilgare 







6 

 6 

 6 

 6 

 6 

 6 

 6 



3 

 3 



3 



2 



3 

 5 



7 



I 



Date 



2 

 2 



6 

 I 



4 



4 



2 



1908 

 Oct. 26 



Nov. 26 



Inoc 



plants 



i< 



(< 



Dec. 



<< 



(( 



26 

 26 



5 



5 

 5 



+++ 





^ Variety trifurcalum Schl, used. 



TABLE X. — Results with Ifordcitm hi/urcafum ]2icc[,^ 



c 

 flj S 



a. 



X 

 4> 



S 

 Z 



Date 



115a 

 115b 

 119b 

 151b 

 164b 



1908 



July 14 



" 14 



" 23 



Nov. 10 



" 16 



Source of conidia 



Hordeum vulgare 





(i 



* Considered by Hackel to be a form of Hordeum sativtun vn!gare, 

 ^ Two leaves of each plant inoculated. 



Con trols 



s 



(A 



itrols 





Results 



'p-S. 



Q. d 













u 



1 J 



OT3 







'^-. 



( \ 



bfl 



. 



a 







* 







Date 



Tnoc. 



plants 



1 







1908 



1 

 I 



1 



1 



4 



4 



2 



July 22 + + + 



4 



3 



3 



- 22 + + -}- 



6 



3 



I 



'' 29 + + + 



7 



I 







Nov. 19 +-f + 



13 



22 



I 



" 26 



+ + + 



Controls 



The infection, if it occurred, was observed in three to five days 

 after inoculation. A number of observations were made, but 

 only the final one is recorded. 



In the accompanying tables I have brought together the results 

 of the tests. I have indicated a full, vigorous growth of mildew by 

 three plus signs, a good infection by two plus signs, a slight infec- 

 tion by one plus sign, and no infection by the minus sign. 



For the purpose of direct comparison, I have brought together 

 in TABLE XXVIII all of the results given with these twenty- 

 seven different grasses. I have also included my^* own previous 

 results with the grass mildew and also the results obtained by 



Marchal ^« and Salmon ^^^ ''' ''. 



Marchal does not give the data upon which his conclusions 

 are based. It is impossible to tell whether he sowed spores from 



