Table 6. Type III tests on variability among isofemale lines for data presented in Table 5.

Parameters	Num DF	Den DF	F value	P
% psyllids infected	14	73	19.1	<0.0001
Psyllid ct value	14	26	4.7	0.0004
% transmission	14	73	6.6	<0.0001
Mean leaf Ct value	13	33	1.26	0.28