Reed: The mildews of the cereals 



367 



with the barley niildew. This result is in harmony with the work 

 of Salmon. Marchal, however, states that H. jubattim can be- 

 infected with conidia from the barley. 



My results with Hordeum maritwium 



agree 



with Marchal's. 

 I was unable to obtain any infection if conidia from barley were 



TABLE XVL — Results \v[TH Secaie cermie la. X Tridcum vulgare Y\\\,^ 



o c 

 55 1) 



I27d 

 136b 

 146a 

 146b 

 iSSa 

 i62d 

 170b 

 171a 

 1 86c 

 187b 

 196b 

 197b 

 198b 



I22C 

 126a 

 127c 



use 



162c 



1 6.8b 



185b 

 ig6a 

 197a 

 198a 













(A 













n 



« 



^*^ 





r 



1 



Date 



Source of 



conidia 



el 















Results 













t)0 



U 



. 



a 







* 



Date 



Tnoc. 



1 J 









■ ■ ■■ 



< 



1 



;zi"" 









plants 



1908 







- 1 





1908 





Oct, 1 9 



Secale cereale 



6 





l2 



Oct. 26 



— 



" 23 



<< 



a 1 



4 









« 31 





'' 31 



(< 



< t 



12 



l3 



1 







Nov. 7 



+' 



" 31 



<< 



<( 



12 



|S 







tt y 



+' 



Nov. 10 



<< 



it 



7 



H 







" 19 



J * 



<< 12 



<< 



it 







^ i 



l^ 



" 21 



++' 



" 20 



<c 



tt 



6 









I 



" 26 





" 20 



(C 



1 



17 



2« 



I 



*' 26 



++ 



a 27 



(< 



ti 



13 



2 







1 



Dec. 5 



++' 



i< 27 



ci 



(C 



13 



I* 



1 







'' 5 



++' 



Dec. 14 



<< 



<< 



30 



2IO 







w 23 ' 



— . 



'' 14 



i< 



t« 



30 



2 



1 







" 23 



++" 



'* 14 



^( 



^ 



30 



2 







" 23 





July 28 



Triticum 







4 



2 





Aug. 5 





*' 28 



te 





4 



2 





" 5 



-■ •* 



Oct. 19 



I i 





6 



I 





Oct, 26 





" 31 



tt 





18 



II2 





Nov, 7 





Nov, 12 



1 ** 





9 



I 



■^ 



1 



" 21 





** 20 



a 





6 



2 







'' 26 



+" 



*' 26 



(t 





12 



18 







Dec. 5 





Dec. 14 



it 





30 



2 







W 23 



— 



" 14 



ti 



<f 



30 



2 







" 23 





" 14 



tc 



(< 



30 



2 







w 23 





Controls - 



^The seed for these experiments was obtained from Professor Bubak, Director of 

 the Botanical Garden, Tabor, Bohemia. 



^The control plant was inoculated with conidia from wheat but no infection* 

 occurred. (Seeexp. 127c and 162c.) 



3 The second leaf inoculated. 



* Slight discolored areas appeared on the inoculated parts. 



5 A good infection, conidia being produced. 



®Two leaves inoculated. 



''A good infection of one leaf, and the lower leaf sheaths of one plant. 



8 Three leaves inoculated. 



9 A fair infection of one leaf. 



^^The second leaf of one plant and the fourth leaf of the other inoculated. . 



"A good infection of one leaf. 



^^Thc second and third leaves inoculated. 



13 A small infected area appeared on one leaf. 



