Susceptibility of Spring & Summer Weeds in Peppers to Herbicide Control / Peppers / Agriculture: Pest Management Guidelines / UC Statewide IPM Program (UC IPM)

	BEFORE PLANTING					PREEMERGENCE OR PREPLANT INCORPORATED					AFTER PLANTING
	CAR	OXY	PAR*	PEL	GLY	MEO	MET*	NAP	BEN	TRI	CAR	CLE	HAL	PEL	PEN	SET
ANNUAL WEEDS
barnyardgrass	N	P	P	C	C	C	C	C	C	C	N	C	P	C	C	C
bromegrasses	N	P	C	P	C	—	C	C	C	C	N	C	—	P	C	P
chickweed, common	P	N	C	C	C	C	C	C	C	C	P	N	C	C	C	N
cockleburs	P	P	C	—	C	—	P	C	N	N	P	N	P	—	N	N
cudweeds	—	N	N	—	C	N	P	P	N	N	—	N	—	—	N	N
dodder	P	N	N	N	C	N	—	N	N	C	P	N	—	N	P	N
fescue, tall	N	P	C	—	C	—	C	C	C	C	N	—	—	—	—	P
fleabane, hairy	N	P	C	P	C	N	C	N	N	N	N	N	—	P	N	N
goosefoot, nettleleaf	—	C	C	—	C	P	C	C	P	C	—	N	—	—	C	N
groundcherries	C	C	C	—	C	C	C	N	N	N	C	N	—	—	N	N
groundsel, common	—	C	C	C	C	N	C	P	N	N	—	N	P	C	N	N
horseweed, common	N	P	P	—	C	N	C	N	N	N	N	N	—	—	N	N
knotweed, common	—	P	P	C	P	N	C	C	P	C	—	N	—	C	C	N
lambsquarters, common	—	C	P	P	C	P	C	C	C	C	—	N	N	P	C	N
lettuce, prickly	—	C	P	—	C	N	C	C	N	N	—	N	C	—	N	N
mallow, little (cheeseweed)	C	C	N	C	P	P	P	P	N	N	C	N	—	C	P	N
nettles	C	C	P	—	P	C	C	P	N	P	C	N	P	—	N	N
nightshades	C	C	C	—	C	C	C	N	N	N	C	N	N	—	N	N
pigweeds	C	C	C	P	C	C	C	C	C	C	C	N	P	P	C	N
polypogon, rabbitfoot	N	P	C	C	C	C	C	C	C	C	N	—	—	C	C	C
puncturevine	—	P	C	—	C	—	C	P	N	P	—	N	—	—	P	N
purslane, common	N	C	C	C	C	C	C	C	C	C	N	N	P	C	C	N
sandburs	N	N	P	—	C	C	C	C	C	C	N	C	—	—	C	C
sowthistles	N	C	P	—	C	P	C	C	N	N	N	N	P	—	N	N
speedwells	N	C	C	—	C	—	C	C	N	P	N	—	—	—	—	N
spurges	—	P	C	—	C	N	C	N	N	N	—	N	—	—	P	N
thistle, Russian	—	P	P	C	C	P	C	P	N	P	—	N	—	C	P	N
witchgrass	N	P	C	—	C	—	C	C	P	C	N	—	—	—	—	N
PERENNIAL WEEDS
bermudagrass (seedling)	N	P	P	—	C¹	N	C	C	C	C	N	C	N	—	C	C
bermudagrass (established)	N	N	P	N	C¹	N	P	N	N	N	N	P	N	N	N	P
bindweed, field (seedling)	C	N	P	—	C	N	P	N	N	P	C	N	—	—	P	N
bindweed, field (established)	P	N	N	N	P	N	P	N	N	P	P	N	—	N	N	N
johnsongrass (seedling)	N	N	C	—	C¹	C	C	C	C	C	N	C	—	—	C	C
johnsongrass (established)	N	N	N	N	C¹	N	P	N	N	N	N	C	—	N	N	C
nutsedge, purple	N	N	N	N	P¹	N	P	N	N	N	N	N	C	N	N	N
nutsedge, yellow	N	N	N	N	P¹	P	C	N	N	N	N	N	C	N	N	N

Chemical Legend
BEN = bensulide (Prefar)	NAP = napropamide (Devrinol)
CAR = carfentrazone (Shark)	OXY = oxyfluorfen (GoalTender)
CLE = clethodim (Select Max)	PAR = paraquat* (Gramoxone SL 2.0)
GLY = glyphosate (Roundup)	PEL = pelargonic acid (Scythe)
HAL = halosulfuron (Sandea)	PEN = pendimethalin (Prowl H2O)
MEO = S-metolachlor (Dual Magnum)	SET = sethoxydim (Poast)
MET = metam sodium* (various trade names)	TRI = trifluralin (Treflan)

Comments
^* Permit required from county agricultural commissioner for purchase or use.
¹ Treatment must occur year before planting; not when peppers are in field.

Text Updated: 12/09