PLATE I 
A. —Comparative resistance of Rice’s No. 330 to Fusarium martii pisi under 
optimum soil conditions for infection compared with Alaska. Left, two cans of Rice’s 
No. 330 grown at 27 0 C. soil temperature in infested soil in April and May. Right, two 
cans of Alaskas grown under identical conditions. In uninfected soil these varieties 
make approximately equal growth. In this case the Alaskas are not only dwarfed, 
but have many dead and yellowed leaves at the base of the stems. 
B. —Degrees of stem and root injury caused to bases of stem and roots of peas by 
F. martii pisi. 
Left, stem completely rotted off from taproot at seed. The plant is supported by a 
few new roots arising from upper portion of the underground stem. Variety, Alaska. 
Center, stem connected with taproot only by an exposed vascular strand. Branches 
of^the taproot nearly dead. Variety, Alaska. 
9% Right, stem connected with taproot by exposed vascular strand. Branches of tap¬ 
root still alive. Vigorous production of new roots from above the point of injury. 
Variety, White Canada. 
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