TABLE I 
on Ate? S. at. BD ee 1 re 
Spore Temperature Chemicals* Length of incu- 
ron ee om gts Moisture Host | Host Storage | Variation in =n 
Min. | Opt. | Max. Inhibiting |°**T8°¢ | ighe 
| | 
% 
Puccinia graminis........ PE SOO ROE occis 4 es 6 ars ee ek mga: Be) OE aR Enea er are eee I-2 months | Bi, putea eee 8 days 
2—- 
hours in | 
cad | 
Puccinia graminis........ PORE Pike oa eee i ey “a I. OW be Cawubesek ys SWORE lo epee ated aan cakes 
0.65 NasCOs | 
0.1 2H2O4 
0.0 CeHsOr 
_Puccinia graminis........ Il |Wiithrich 20-21° We WY re 8 acti rey hs ks he oe fs 6h Se ok l oe c ca ca bwen 
ee ts hours|o.r HCl | 
Puccinia graminis........ © IORI Nc ee cas cbeaalenters tee ei Sect pe beck he eG Agi. 1) Baek Soe mene een 
z 0.01 ZnSO, lengthens 
0.0r ZnCl incubation 
o0.or CuSO, 
ME Peete | ice We wted ecu sae ooo blame ee ue os ewe ae Wen ee 
Puccinia graminis........ Be cE ONS ores eta cee gk wtlv ace as ry 
Evans weather 
favors 
elopment 
Puccinia graminis........ II |Eriksson | Low Eee nine ig RC Ge ae cles PCN eee a ioe Oy es oe Re Se 
cious” 
Puc inia coronata........ It [Eriksson Low “emperatures SOU er sec a VIG. Sere eee ea by k « Fabs} oo. SAU Se Ne rat peewee nde 
cious" 
Puccinia glumarum....... Il |\Eriksson bee sos stig sohin enh CO, wha cemmge = SSS Sane ie Gee Pamir eerie adres ra seat alee een enen 
accelerate cious’’|} 0.01 FeSO« 
0.001 ZnSO, 
* All data as"to chemicals are Wiithrick's. 
SIsnd TVAaXHO JO AMOLTND AH] :aANWOUy 
LOS 
