. Journal of agricultural research . h showing the rate of growth of Fusarium eumardi on potato agar at different temperatures remainder formed colonies measuring on the average only 22 to 32 diameter. The maximum temperature at which growth occurred in Fusariumcoendeum, F. trichothecioides, and Veriicillium alho-airum No. 427 was ator slightly below 30° C. Germination took place with F. trichothecioidesat 30°, but no growth visible to the unaided eye was formed. The othertwo fungi did not even germinate at this temperature. F. discolor , F. eiCmartii, and V. albo-atrwm No.
. Journal of agricultural research . h showing the rate of growth of Fusarium eumardi on potato agar at different temperatures remainder formed colonies measuring on the average only 22 to 32 diameter. The maximum temperature at which growth occurred in Fusariumcoendeum, F. trichothecioides, and Veriicillium alho-airum No. 427 was ator slightly below 30° C. Germination took place with F. trichothecioidesat 30°, but no growth visible to the unaided eye was formed. The othertwo fungi did not even germinate at this temperature. F. discolor , F. eiCmartii, and V. albo-atrwm No. 426 were not able togerminate at 35°. The Verticillium spores remained unchanged, butthe normal typical spores of the two Fusaria were gradually changed tochlamydospores. Similar transformation of the spores of F. oxysporumoccurred at 37° and of F. radicicola at 39°. 156105*—2( 1 Brooks, Charles, and Cooley, J. S. Op. ciT., p. 156. 2 5i6 Journal of Agricultural Research voi. xviii, No. lo DIAMETER OP COLONIES IN j^ ^ 7s £0 es JO js- Fig. 4.—Graph showing the rate of growth of Fusarium oxyspcnun on potato agar at different tempera-tures. Feb. 16,1920 Temperature Relations of Potato-Rot Fungi 517 DIAMETER OP COLONIES IN MILLIMETERS.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagricul, bookyear1913
