Table 2.

Regression table: β-value of control and selected populations and respective t-values at different larval stages.

larval duration—β-values	control populations	selected populations	t-values
L1—zero to 24 h post-hatching	1.66	2.17	0.97
L2—24–48 h post-hatching	8.62	17.21	3.54
L3—48 h to wandering stage mid-pointa	49.77	29.49	0.16

^aFor selected populations, as L3 is of small duration, thus mid-point value is considered for the analysis. L1, L2 and L3 stand for first, second and third larval stages.