Corn-Soybean Rotation Systems in the Mississippi Delta: Implications on Mycotoxin Contamination and Soil Populations of Aspergillus flavus

Table 1

Effect of previous crop on Aspergillus flavus soil propagules and frequency of toxigenic isolates.¹

Sample	Colony forming units log (10)/g soil			Aflatoxigenic isolates %
	Corn	Soybean	LSD 0.05	Corn	Soybean	LSD 0.05
Fall 2006	2.16 a	2.32 a	0.17	57.1 a	64.2 a	11.4
Spring 2007	3.22 a	3.20 a	0.09	58.9 a	54.9 a	6.2
Fall 2007	2.40 a	2.35 a	0.19	47.1 a	42.1 a	10.3
Spring 2008	2.85 a	2.71 b	0.10	55.1 a	50.9 a	9.4
Fall 2008	2.39 a	2.17 b	0.21	57.4 a	60.3 a	13.1

¹Means within a row in each year for each variable followed by the same letter are not significantly different at the 5% level.