Table 4. Summary of the non-linear regression analyses of the cumulative emergence curves (Fig. 5) of the F₁ and F₂ progenies of adult maize weevils (Sitophilus zeamais) exposed to different endosymbiont-suppression treatments via water-ingested antibiotics.

Generation	Model	Treatment	Parameter estimates (± SE)			dferror	F	P	R2
			a	b	c
		Untreated control	337.92±12.75	31.65±1.18	6.40±0.99	93	255.96	<0.001	0.85
	Sigmoid (3-parameter)	Amoxicillin	319. 91±8.08	26.67±0.85	6.07±0.72	93	407.98	<0.001	0.89
1st	y = a/(1+exp(−(x–b)/c))	Ciprofloxacin	127.35±6.81	30.06±1.65	5.51±1.40	93	105.11	<0.001	0.69
		Rifamycin	275±9.44	32.61±1.07	6.70±0.89	93	339.27	<0.001	0.88
		Tetracycline	331.98±6.05	25.14±0.63	6.05±0.53	93	715.02	<0.001	0.94
		Untreated control	587.37±15.65	31.25±0.93	8.92±0.74	93	679.42	<0.001	0.93
	Sigmoid (3-parameter)	Amoxicillin	437.49±10.19	36.96±0.68	7.12±0.55	93	1,046.67	<0.001	0.96
2nd	y = a/(1+exp(−(x–b)/c))	Ciprofloxacin	173.51±8.64	36.85±1.46	7.15±1.17	93	234.68	<0.001	0.83
		Rifamycin	581.50±8.78	36.39±0.44	7.06±0.36	93	2,359.23	<0.001	0.98
		Tetracycline	228.41±7.93	29.41±1.16	7.00±0.97	93	283.58	<0.001	0.86

All parameter estimates were significant at P<0.01 by Student’s t-test.