500 A. G. KAIS AND G. A. SNOW 



which were almost all very large and uniform in shape. The D/L ratios 

 were consistently lower than for the C. quevcuum galls and changed little 

 between 6 and 12 months. 



Table 2. Mean ratio of gall diameter/gall length 6 and 12 months 

 after inoculation with C. fusifovme isolates 



Pine host 

 and month 



Mississippi isolates 



Sand 



6 0.17 (4) a 0.17 (6) 0.15 (3) 0.21 (5) 



12 --- D --- --- .29 (1) 



Jack 



6 

 12 



•19 (1) 



.24 

 .69 



(3) 

 (1) 



.19 (8) 



.30 (8) 

 .39 (1) 



Shortleaf 













6 



12 



.18 (8) 



.19 



(3) 



.17 (4) 



.20 (3) 



Loblolly 













6 



12 



.12 (16) 

 .12 (16) 



.13 



.17 



(15) 

 (12) 



.11 (15) 

 .13 (15) 



.13 (14) 

 .12 (13) 



Slash 



6 .12 (15) .15 (14) .11 (15) .12 (12) 



12 .15 (15) .14 (13) .13 (14) .13 (10) 



Numbers of plants with galls shown in parentheses 

 Dashed lines indicate that no plants had galls. 



Figure 3 illustrates reactions of various pine species to the 

 different isolates of Cvonavtium. Most responded in a uniform manner to 

 inoculation with individual isolates of either fungus species. Excep- 

 tions to this were loblolly and sand pine, which, when inoculated with 

 North Carolina No. 2 isolate of C. quevcuum, formed galls of both types 

 (Fig. 3G,H). 



