The data of' taMe VIII show, for these second-day erowth 



temperature graphs, that the approximate maximum temperature Is 



abc ,+ :"C. for the two fungi V hthora ar.d Diplodia, while 



o 

 it is at on* 32.5 for Pythiacystis and about 23 for Phi 



The actual optimal temperatures (as read from ti 3 rraphs) are 

 quite different for all four funpi ; this value is lowest 

 (26.5) for Pythiacystis and highest (31.5 ) for Phytophthora. 

 As to the extent of the temperature range for rates equal to 

 or greater tnan 0.1 of the maximum rate, the four fungi are 

 all considerably different ; Diplodia has the greatest ran*-e 

 (27.6 ) and Phomopsis has the smallest (22.3 ). This, par- 

 tial temperature range has its lower limit lowei ( ?• . • ) for 

 Diplodia, a little higher for Pythiacystis (8.7 ) and Pi p- 

 sis (9.1 ) a nd highest for Phytophthora (12. ) % But the four 

 gi do not stand in this relation in regard to the upper limit 



of this range, for Phytophthora and Diplodia show about the s« 



o & 

 limit (36.1 and 36.0 ) while Pythiacystis and Phomopsis also 



nearly agree in this respect (31. o and 31.4 ), the value for 

 the last two being markedly lower than for the first two. 



It is especially interesting to observe the relative 

 positions cf the optimal temperature values in the respective 

 partial temperature ranges (for relative rates of 0.1 cr mere), 

 as shown in the last two columns of tar is VIII. Roughly 

 speaking, it may be said that from about 70 to about £0 per 

 cent, of the temperature range here considered, lies below the 

 optimal temperature, with from about 30 to about 20 per cen*. 



lying above. But the agreement aMti" the four fungi is not 

 more striking in this respect than in the other respects men- 

 tioned above. The optimal temperature occurs lowest, in this 



