Table 5. Mycotoxin profile of stored winter wheat grain, debris and clumps samples collected from 6 OTA positive bins from 2011–2014 in Southwestern Ontario.

Control point	Sample1		OTA (ng/g)						OTB (ng/g)						citrinin (ng/g)
	type	n	(%)2	mean3	SE4	T5	Pr>F6	7	(%)2	mean3	SE4	t5	Pr>F6	7	(%)2	mean3	SE4	t5	Pr>F6	7
Manhole	Clumps	5	(100)	370.3	198.1	7.2	< .0001	A	(80)	47.6	22.1	4.6	0.0001	A	(100)	50.6	32.3	7.3	< .0001	A
Wall/floor	Debris	6	(100)	80.0	34.0	5.7	< .0001	AB	(50)	18.5	12.2	3.0	0.0065	AB	(100)	14.9	4.6	7.2	< .0001	AB
Auger	Debris	5	(100)	59.7	30.7	5.0	< .0001	AB	(100)	11.6	6.1	3.0	0.0062	AB	(100)	18.6	8.6	6.2	< .0001	AB
Side door	Clumps	4	(100)	46.3	19.0	4.9	< .0001	AB	(75)	4.8	3.8	2.1	0.0475	AB	(100)	8.9	1.3	5.6	< .0001	AB
Untouched Surface	Grain8	6	(67)	15.9	8.0	2.9	0.007	BC	(33)	0.8	0.6	0.8	0.4556	AB	(50)	5.4	2.8	3.4	0.0022	BC
First/last loads	Grain	7	(29)	1.8	1.2	0.7	0.514	C	(29)	0.2	0.1	0.3	0.7879	B	(29)	1.1	0.8	0.7	0.4739	C
Disturbed surface/ intermediate loads	Grain	4	(0)	0.0	0.0	0.2	0.818	C	(0)	0.0	0.0	0.3	0.7625	B	(0)	0.0	0.0	0.8	0.4381	C
Variance components	Dfn	Dfd				F	Pr>F					F	Pr>F					F	Pr>F
Control point	6	24				8.36	< .0001					3.33	0.0157					9.85	< .0001
Farm	5	24				0.36	0.8949					0.7	0.6495					0.8	0.578

¹Samples types: grain clump samples found near manhole opening and door frames, debris and old grain found in augers, on floor and on walls; and grain collected from different areas in the bin.

²percentage of positive samples (LOD:0.3 ng/g);

³mean and

⁴standard error of untransformed data;

⁵t value and

⁶values for the type III error statistics were calculated using ln(X+1) transformation;

⁷Tukey-Kramer multiple comparisons test (P<0.05), rows with the same letter are not significantly different.

⁸one clump was found on the bulk surface.