Relative Efficacy of Single and Stacked Corn Traits Against Insect Pests in Kentucky

Ric Bessin, Extension Entomology, University of Kentucky
Latest update: May 2011

Corn Types	Insect toxins		Dual modes of Action	ECB	SWCB	BCW	CEW	FAW	WCRW	Min. Refuge Requirement
YieldGard CB	Cry1Ab			++++	++++		++	++		20% block
Herculex 1	Cry1F			++++	++++	++	+	+++		20% block
Agrisure CB	Cry1Ab			++++	++++		++	++		20% block
YieldGard RW	Cry3Bb1								++	20% block
Herculex RW	Cry34Ab1, Cry35Ab1								++	20% block
Agrisure RW	mCry3A								++	20% block
YieldGard Plus	Cry1Ab, Cry3Bb1			++++	++++		++	++	++	20% block
Herculex Xtra	Cry1F, Cry34Ab1, Cry35Ab1			++++	++++	++	+	+++	++	20% block
Agrisure 3000GT	Cry1Ab, mCry3A			++++	++++		++	++	++	20% block
YieldGard VT3	Cry1Ab, Cry3Bb1			++++	++++		++	++	+++	20% block
YieldGard VT2 Pro	Cry1A.105, Cry2Ab2		yes	++++	++++	++	+++	++++		5% block
YieldGard VT3 Pro	Cry1A.105, Cry2Ab2, Cry3Bb1			++++	++++	++	+++	++++	+++	20% block
SmartStax	Cry1A.105, Cry2Ab2, Cry3Bb1, Cry1F, Cry34Ab1, Cry35Ab1		yes	++++	++++	+++	+++	++++	+++	5% block
Optimum Intrasect	Cry1Ab, Cry1F		yes	++++	++++	++				5% block
Agrisure Viptera 3110	Vip3Aa, Cry1Ab			++++	++++	+++	++++	++++		20% block
Agrisure Viptera 3111	Vip3Aa, Cry1Ab, mCry3A			++++	++++	+++	++++	++++	++	20% block
AcreMax 1	90% Cry1F, Cry34Ab1, Cry35Ab1 + 10% Cry1F			++++	++++	++	+	+++	++	RIB + 20% block
AcreMax RW	90% Cry34Ab1, Cry35Ab1								++	RIB
SmartStax Refuge Advanced/Complete	Cry1A.105, Cry2Ab2, Cry3Bb1, Cry1F, Cry34Ab1, Cry35Ab1 + 5% refuge seed		yes	++++	++++	+++	+++	++++	+++	RIB

ECB = European corn borer
SWCB = Southwestern corn borer
BCW = Black cutworm
CEW = Corn earworm
FAW = Fall armyworm
WCRW = Western corn rootworm


‘ + ‘ = Poor to fair control
‘++’ = Good control
‘+++’ = Very good control
‘++++’ = Excellent control
May 2011