Agriculture: Corn Pest Management Guidelines

Susceptibility of Weeds to Herbicide Control

Weeds Pages

	PREEMERGENCE							POSTEMERGENCE
	ALA	ATR*	CAR	EPT	MET	PEN	YUK	BRO	DIC*	DIF	FOR	GLY	HAL	NIC	MTZ	PAR*	24D*
ANNUAL WEEDS
barley, hare	C	C	N	C	C	C	N	N	N	N	—	C	N	—	C	C	N
barnyardgrass	C	C	N	C	C	C	N	N	N	N	C	C	P	C	P	N	N
cocklebur, common	N	C	P	N	N	N	C	C	C	C	C	C	C	N	C	C	C
goosefoot	N	C	—	C	N	C	C	C	C	C	—	C	—	—	C	C	C
groundcherries	N	C	C	C	N	N	C	C	C	C	—	C	—	—	P	C	C
junglerice	N	—	N	—	N	C	N	N	N	N	—	—	N	—	—	—	N
knotweed, common	N	C	—	N	N	C	C	C	C	C	—	C	—	—	C	P	P
lambsquarters, common	P	C	C	C	P	C	C	C	C	C	C	C	P	N	C	P	C
lettuce, prickly	N	—	—	—	N	N	C	P	C	C	—	C	N	—	C	C	C
morningglories	P	C	C	C	P	N	C	C	C	C	P	C	P	C	N	—	C
nightshade, black	C	C	C	C	C	N	C	C	C	C	C	C	N	N	P	C	C
nightshade, hairy	C	C	C	C	P	N	C	C	C	C	C	C	N	N	N	C	C
oat, wild	—	C	N	C	—	P	N	N	N	N	C	C	N	P	N	C	N
pigweed, redroot	P	C	C	C	P	C	C	P	C	C	C	C	P	C	C	C	C
puncturevine	N	P	—	C	N	P	C	C	C	C	—	C	—	C	—	C	C
purslane, common	C	C	N	C	P	C	C	N	C	C	—	C	P	P	P	C	C
purslane, horse	C	C	N	—	C	C	C	N	C	C	—	P	—	—	—	—	P
shattercane	P	—	N	—	P	—	N	N	N	N	C	C	N	C	—	—	N
sprangletops	C	C	N	—	C	C	N	N	N	N	—	C	N	—	N	—	N
spurge, spotted	N	P	P	N	N	C	P	C	P	P	—	C	N	—	C	C	C
sunflower, common	N	N	P	N	N	N	C	C	C	C	C	C	C	P	P	—	C
thistle, Russian	N	C	—	N	N	P	C	C	C	C	—	C	—	—	C	P	C
velvetleaf	N	P	C	N	N	N	C	C	C	C	C	P	C	N	C	—	C
wheat (volunteer)	N	C	N	C	N	P	N	N	N	N	—	C	N	N	C	C	N
PERENNIAL WEEDS
bermudagrass (plant)	N	N	N	N	N	N	N	N	N	N	N	C	N	N	N	N	N
bermudagrass (seed)	N	C	N	P	N	N	N	N	N	N	N	C	N	—	N	P	N
bindweed, field (plant)	N	N	N	N	N	N	P	N	P	P	N	C	—	—	P	N	P
bindweed, field (seed)	P	C	P	N	P	P	C	P	C	C	N	C	—	—	P	P	C
datura, sacred	N	—	N	N	N	N	—	N	—	—	C	C	N	C	—	N	—
johnsongrass (plant)	N	N	N	P	N	N	N	N	N	N	C	C	N	C	N	N	N
johnsongrass (seed)	P	C	N	P	P	P	N	N	N	N	C	C	N	C	N	P	N
knapweed, Russian	N	—	N	N	N	N	—	N	—	—	—	C	—	—	—	N	—
nightshade, silverleaf	N	—	N	N	N	N	C	N	C	C	—	C	N	—	—	N	C
nutsedge, purple	N	N	N	C	N	N	C	N	N	N	N	P	C	N	N	N	N
nutsedge, yellow	C	N	N	C	C	N	C	N	N	N	N	P	C	N	P	N	N

C

= control

P

= partial control

N

= no control

—

= no information

ALA	= alachlor* (Micro-Tech)	HAL	= halosulfuron (Sandea)
ATR	= atrazine* (AAtrex, etc.)	MET	= s-metolachlor (Dual Magnum)
BRO	= bromoxynil (Buctril)	MTZ	= metribuzin (Sencor)
CAR	= carfentrazone (Shark)	NIC	= nicosulfuron (Accent)
DIC	= dicamba* (Banvel, Clarity)	PAR	= paraquat* (Gramoxone Inteon)
DIF	= diflufenzopyr (Distinct)	PEN	= pendimethalin (Prowl, Prowl H2O)
EPT	= EPTC (Eradicane)	24D	= 2,4-D*
FOR	= foramsulfuron (Option)	YUK	= halsulfuron/dicamba (Yukon)
GLY	glyphosate** (Roundup)

*Permit required from county agricultural commissioner for purchase or use.

**Only for transgenic varieties of corn that contain specific herbicide-resistant genes.

Text Updated: 07/09