Journal of Agricultural Research 
Vol. XXIII, No. ir 
850 
wheatTseries^ 16 ““ had ^ P re P ared as previously described for the 
Com emerged first at the soil temperature of 22° C The* 
decreased gradually below this temperature^ 3 Bdow 
sns £*° f ? 2 
At the end of two or three months’ time, at this low temperature th^ 
ts elongated 10 to 12 cm. and the plumule had grown several centi 
suSilem ^d britt^Th 1 1 th6 lt>W Sdl tem P erature s were stocky, very 
from w to d i6 b ° C pi? 6 dar . k ^ een at soil temperature^ 
•« ’LZiZL L.’SSXXST 9 of gre “ de,:rea “ d “ ,,a 
“flueace of soil temperature on the comparative develooment of 
seedW ™L PlU r le ° f ^ COm seedlin S was similar to that in the wheat 
tssst 
at the ow temperatures until entirely out of the ground P “ 
&tt££t2£s2r ,pfflod of ^ “ d 
T 11 j 6 ^ heat ’ mature d faster at the higher temperatures the 
floral parts developing first at about 7.2° to ?s° r n- P~“ luras » ™ e 
po^bfe, due u£ retardedvegetative deveELL VZ ZZ ^ 
m the tanks at soil temperatures below 16°. pmem ’ to mature corn 
, Sacral, then, com functioned at much higher soil temnemtnr»o 
than wheat, the optimum for emergence was 5»C and tK. ? 
m«t uniform seedlings resulted at 24° to ™ 3 ’ ^ largCSt ’ 
r f SUltS indicate ^ seedlings of spring and winter wheat and 
INFLUENCE OF SOII, TEMPERATURE ON THE DEVELOPMENT OF SEEDLING- 
BRIGHT IN MARQUIS WHEAT 
rJ^TL 0n th i? influ ? lce of temperature on the development of the 
2 t k ve , shown that germination of the conidia and vegetative 
growth take place over a wide temperature range from below 8° to about 
Sni'andonrii^/ ** of ^I^rinients was started to determined 
ra ?£ aad optimum temperature for infection of wheat seedlings 
Uniform disease-free kernels were treated with mercuric chlorid and 
^ in a ^ suspemkmofoonMia 
of Gibberella saubtneitt for 10 minutes, lifted out with sterile forceps, 
