Table 1. The proportion of leaf disc samples that tested positive for clothianidin.

	Buckwheat	Mustard	Partridge Pea	Phacelia	Plains Coreopsis	Safflower	Sunflower
Conventional	0.94 (35)*	0.25 (20)	0.60 (20)	0.63 (30)	1.0 (10)	0.86 (29)	0.76 (34)
Organic	0.95 (40)	0.23 (30)	0.60 (15)	0.76 (29)	1.0 (5)	0.82 (39)	0.77 (35)
z-statistic	0.19	0.24	0	1.0	0	0.44	0.10
P	0.85	0.81	1.0	0.32	1.0	0.66	0.92

^*Total samples analyzed in parentheses.