Corn

Pest Management Guidelines


Susceptibility of Weeds to Herbicide Control

(Reviewed 1/06, updated 7/09)

In this Guideline: More about weeds in corn:

Susceptibility of Weeds to Herbicide Control
Customize list of weeds
ANNUAL WEEDS
barley, hare
barnyardgrass
cocklebur, common
goosefoot
groundcherries
junglerice
knotweed, common
lambsquarters, common
lettuce, prickly
morningglories
nightshade, black
nightshade, hairy
oat, wild
pigweed, redroot
puncturevine
purslane, common
purslane, horse
shattercane
sprangletops
spurge, spotted
sunflower, common
thistle, Russian
velvetleaf
wheat (volunteer)
PERENNIAL WEEDS
bermudagrass (plant)
bermudagrass (seed)
bindweed, field (plant)
bindweed, field (seed)
datura, sacred
johnsongrass (plant)
johnsongrass (seed)
knapweed, Russian
nightshade, silverleaf
nutsedge, purple
nutsedge, yellow
PREEMERGENCE
ALA ATR* CAR EPT MET PEN YUK
CCNCCCN
CCNCCCN
NCPNNNC
NCCNCC
NCCCNNC
NNNCN
NCNNCC
PCCCPCC
NNNC
PCCCPNC
CCCCCNC
CCCCPNC
CNCPN
PCCCPCC
NPCNPC
CCNCPCC
CCNCCC
PNPN
CCNCCN
NPPNNCP
NNPNNNC
NCNNPC
NPCNNNC
NCNCNPN
 
NNNNNNN
NCNPNNN
NNNNNNP
PCPNPPC
NNNNN
NNNPNNN
PCNPPPN
NNNNN
NNNNNC
NNNCNNC
CNNCCNC
POSTEMERGENCE
BRO DIC* DIF FOR GLY HAL NIC MTZ PAR* 24D*
NNNCNCCN
NNNCCPCPNN
CCCCCCNCCC
CCCCCCC
CCCCPCC
NNNNN
CCCCCPP
CCCCCPNCPC
PCCCNCCC
CCCPCPCNC
CCCCCNNPCC
CCCCCNNNCC
NNNCCNPNCN
PCCCCPCCCC
CCCCCCC
NCCCPPPCC
NCCPP
NNNCCNCN
NNNCNNN
CPPCNCCC
CCCCCCPPC
CCCCCPC
CCCCPCNCC
NNNCNNCCN
 
NNNNCNNNNN
NNNNCNNPN
NPPNCPNP
PCCNCPPC
NCCNCN
NNNCCNCNNN
NNNCCNCNPN
NCN
NCCCNNC
NNNNPCNNNN
NNNNPCNPNN
 
ANNUAL WEEDS
barley, hare
barnyardgrass
cocklebur, common
goosefoot
groundcherries
junglerice
knotweed, common
lambsquarters, common
lettuce, prickly
morningglories
nightshade, black
nightshade, hairy
oat, wild
pigweed, redroot
puncturevine
purslane, common
purslane, horse
shattercane
sprangletops
spurge, spotted
sunflower, common
thistle, Russian
velvetleaf
wheat (volunteer)
PERENNIAL WEEDS
bermudagrass (plant)
bermudagrass (seed)
bindweed, field (plant)
bindweed, field (seed)
datura, sacred
johnsongrass (plant)
johnsongrass (seed)
knapweed, Russian
nightshade, silverleaf
nutsedge, purple
nutsedge, yellow

Ratings Legend
C= control    P= partial control    N= no control    = no information

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

Comments
  * Permit required from county agricultural commissioner for purchase or use.
  ** Only for transgenic varieties of corn that contain specific herbicide-resistant genes.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Corn
UC ANR Publication 3443

Weeds
S. D. Wright, UC Cooperative Extension, Tulare County
W. M. Canevari, UC Cooperative Extension, San Joaquin County
D. J. Munier, UC Cooperative Extension, Glenn County
Acknowledgement for contributions to Weeds:
M. L. Campbell-Mathews, UC Cooperative Extension, Stanislaus County
R. N. Vargas, UC Cooperative Extension, Madera County

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