Table 3.

Analysis of the effects of cropping and experimental conditions on biotic stresses using ANOVA: means and standard errors of disease incidence and severity for Pyriularia oryzea , BLB, and Striga infestation averaged over varietal mixtures and pure stands and each site.

	Pyricularia on leaf incidence (%)				Pyricularia on leaf severity (nb)				Pyricularia on panicle incidence (%)				Pyricularia on panicle severity (nb)				BLB (%)				Striga infection (nb)
Crop conditon
Pure stand	46	±	2	a	8	±	1	a	12	±	0.11	a	21	±	3	a	20	±	2	a	70	±	15	a
Mixtures	41	±	1	b	5	±	1	b	6	±	0.06	b	12	±	1	b	20	±	2	a	66	±	15	a
p-value	0.02		*		<0.001		***		<0.001		***		0.01		**		0.9		NS		0.3	NS
Site
Site ANK	45	±	2	a	10	±	1	a		0				0				0			70	±	6
Site IVO	42	±	2	b	3	±	1	b	7.5	±	0.1		14	±	2		20	±	2		0
p-value	0.02		*		<0.001		***
Crop condition * Site
p-value	0.11		NS		<0.001		***		NA				NA				NA				NA
Monocultures
EARLY_MUTANT_IAC_165		0				0			8.3	±	0.1	b	12	±	4	b	9	±	2	c	82	±	15	a
FOFIFA 152		0				0				0				0			23	±	11	b	73	±	12.5	a
FOFIFA 154		0				0				0				0			31	±	15	a	77	±	14.5	a
DOURADO_PRECOCE	46	±	2		8	±	1		16	±	0.1	a	30	±	4	a	17	±	14	bc	49	±	13.3	b
p-value									0.02		*						<0.001		***		<0.01		**

*, **, *** p-value indicating significant differences at the 5%, 1%, and 0.1% levels of confidence, respectively. The letters ‘a’ and ‘b’ indicate significant differences at the 5% level of confidence, with ‘a’ denoting the higher mean value and ‘b’ the lower mean value. Levels with the same letter are not significantly different, while levels with different letters are considered significantly different from each other. NS, non-significant. NA, non-existent value.

The values in bold represent the p-values, while the letters denote the multiple comparison groups resulting from the Fisher's test.