Stability of Sources of Resistance to Cowpea Aphid (Aphis craccivora Koch, Hemiptera: Aphididae) across Major Cowpea Production Zones in Ghana

Table 4

Effect of seedling stage aphid infestation on number of days to flowering and maturity.

	Days to 50% flowering			Days to maturity
Cultivar/genotype	Uninfested	Infested	95% CI of mean difference (infested–uninfested)	Uninfested	Infested	95% CI of mean difference (infested–uninfested)
Apagbaala	38 ± 0.21	42 ± 0.49	3.06–4.94	61 ± 0.48	64 ± 0.26	1.80–3.87
SARC1-57-2	36 ± 0.21	38 ± 0.31	1.04–2.62	59 ± 0.45	62 ± 0.21	2.48–4.19
SARC1-91-1	37 ± 0.21	40 ± 0.42	2.34–3.66	61 ± 0.37	63 ± 0.21	1.79–2.88
IT97K-499-35 (Songotra)	38 ± 0.22	39 ± 0.33	0.38–1.96	61 ± 0.40	63 ± 0.21	1.04–2.62
Zaayura	42 ± 0.21	48 ± 0.21	4.79–5.88	65 ± 0.56	70 ± 0.21	3.23–6.10
Resistant BC4F3 (Zaayura//(Zaayura × SARC1-57-2))	41 ± 0.21	46 ± 0.49	2.85–5.15	65 ± 0.00	69 ± 0.40	3.14–5.20
Susceptible BC4F3 (Zaayura//(Zaayura × SARC1-57-2))	42 ± 0.42	48 ± 0.21	4.90–7.77	65 ± 0.79	69 ± 0.21	2.03–6.31
IT99K-573-1-1	38 ± 0.21	40 ± 0.42	2.33–3.66	60 ± 0.17	63 ± 0.31	1.81–3.52
IT99K-573-3-2-1	37 ± 0.37	40 ± 0.43	1.40–3.60	60 ± 0.52	63 ± 0.26	2.34–3.66
Padituya	42 ± 0.21	47 ± 0.73	2.50–6.83	65 ± 0.50	68 ± 0.22	1.85–4.15
Mean	39 ± 0.33	43 ± 0.50	3.11–4.05	62 ± 0.34	65 ± 0.40	2.86–3.54

Note. CI = confidence interval; data are means ± standard error of mean. CI is significant at 5% probability threshold level (i.e., mean differences that do not include zero are significantly different).