Reed : The mildews of the cereals 



363 





TABLE 



; XL — Results with 



Ilordeum vulgare L.^ — Continued 



} 









1^ 



C5 *; 





Results 



^ £ 



Date 



Source of conldia 















1 









O-D 



u 



^i^ 



[ 





9 P. 









. 



a 



c 



Date 



Inoc, 



Controls 



'H V 







■? 



;5" 









pJants 







1908 









190S 







99c 



Mar. 3 



Hordeuni Zeoaiton 



7 



2 



I 



Mar. 10 



+++ 



— 



lOOC 



" 3 



* 



7 



2 



I 



" 10 



+++ 





lOlC 



" 3 



<< <£ 



7 



3 



3 



*' 10 



+++ 





39c 



Jan. 17 I 



Triticuni dicoccuni 



13 



3 



2 



Jan. 24 







40c 



" 17 



<< C I 



'3 



2 



3 



** 24 





« 



59b 



Feb. I 



Triticum durum 



8 



2 



3 



Feb. 10 









60a 



'• I 



Triticnm polonicnm 



» 



2 



2 



** 10 



J 



— 



94a 



Mar. 3 

 1907 



Iritkiim Spelta 



7 



I 



I Mar. 10 



1907 



1 

 1 





1 6b 



Dec. 25 



Triticum vulgai-e 



II 



2 



2 Dec. 30 







i8c 



'* 25 



iC It 



II 



4 



4 '' 30 









19c 



f< 25 



it tt 



9 



2 



3 



" 30 



1908 





1 



27a 



*' 3' 



tt c< 



10 



3 



3 



Jan. 7 







28a 



" 31 



1 



10 



4 



3 



ti 7 







29c 



u 31 



(1 €t 



6 



3 



4 



" 7 









190S 















30c 



Jan. 2 



u ti 



8 



4 



2 



** II 



— 



* 



32b 



" 2 



CI << 



8 



3 



2 



*' II — 





33b 



" 2 



(< « 



8 



3 2 



*' II 









4IC 



" 17 



it tt 



13 



2 



3 '* 24 







63 c 



Feb. 3 



a tt 



10 



I 



I 



Feb. 10 







75a 



*^ 10 



tt tt 



9 



4 



3 



it 17 







+* 



96c 



Mar. 3 ' 



a it 



7 



2 



4 Mar. 10 







^ Hordeum sativum vulgare HackeL 



2 A small infected area appeared on one control. 



^The second green leaf of each plant inoculated, 



each of the cereals on the various grasses. Consequently T have 

 merely indicated whether his results are negative or positive. 

 I have indicated his results simply on the basis of his seven 

 formes spe dales. ♦ 



In this table the first figure indicates the number of tests, the 

 second figure the number of plants or leaves inoculated, and the 

 third figure the number that became infected. 



It is plain, from a consideration of table I, and also the general 

 summary, that the oat {Arena sativci) is immune to the barley, rye, 

 and wheat mildews. In no case did complete infection follow 

 where conidia were used from any of these three cereals. If, 

 however, conidia are taken from A. sativa and sown upon the same 



Ma 



mon's results. 



