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

Table 4

Seed quality parameters relating to mycotoxin contamination in corn and soybean averaged among rotations 2005 to 2008.¹

Year	Crop	Aspergillus propagules Log (10) CFU/g	Aspergillus infected seed %	Toxigenic isolates	Aflatoxin (ng/g)	Fumonisin (μg/g)
2005	Corn	1.93 a	33.6 a	28.5 a	16.7 a	3.6 a
	Soybean	1.30 b	7.0 b	15.9 b	2.3 b	0.1 b
	LSD	0.30	10.0	12.1	4.2	1.0
2006	Corn	3.33 a	78 a	77 a	37.1 a	0.9 a
	Soybean	3.33 a	66 b	7 b	0.1 b	0.2 b
	LSD	NS	8	12	1.2	0.3
2007	Corn	2.93 a	44 a	17 a	2.4 a	0.2 a
	Soybean	2.63 b	30 a	10 a	0.6 a	0.1 a
	LSD	0.22	NS	NS	NS	NS
2008	Corn	3.99 a	93 a	46 a	54.8 a	3.5 a
	Soybean	2.72 b	36 b	31 b	6.8 b	0.2 b
	LSD	0.25	12	10	2.1	1.0

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