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How to Manage Pests
UC Pest Management Guidelines
Corn
Susceptibility of Weeds to Herbicide Control
(Reviewed 1/06,
updated 8/08)
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In this Guideline:
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More about weeds in corn:
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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 |
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| PREEMERGENCE |
|---|
| ALA |
ATR* |
CAR |
DIM |
EPT |
MET |
PEN |
YUK |
| C | C | N | — | C | C | C | N |
| C | C | N | C | C | C | C | N |
| N | C | P | — | N | N | N | C |
| N | C | — | — | C | N | C | C |
| N | C | C | — | C | N | N | C |
| N | — | N | — | — | N | C | N |
| N | C | — | — | N | N | C | C |
| P | C | C | P | C | P | C | C |
| N | — | — | — | — | N | N | C |
| P | C | C | — | C | P | N | C |
| C | C | C | P | C | C | N | C |
| C | C | C | P | C | P | N | C |
| — | C | N | — | C | — | P | N |
| P | C | C | C | C | P | C | C |
| N | P | — | — | C | N | P | C |
| C | C | N | C | C | P | C | C |
| C | C | N | — | — | C | C | C |
| P | — | N | — | — | P | — | N |
| C | C | N | — | — | C | C | N |
| N | P | P | C | N | N | C | P |
| N | N | P | — | N | N | N | C |
| N | C | — | — | N | N | P | C |
| N | P | C | — | N | N | N | C |
| N | C | N | — | C | N | P | N |
| |
| N | N | N | — | N | N | N | N |
| N | C | N | — | P | N | N | N |
| N | N | N | — | N | N | N | P |
| P | C | P | — | N | P | P | C |
| N | — | N | — | N | N | N | — |
| N | N | N | — | P | N | N | N |
| P | C | N | C | P | P | P | N |
| N | — | N | — | N | N | N | — |
| N | — | N | — | N | N | N | C |
| N | N | N | — | C | N | N | C |
| C | N | N | P | C | C | N | C |
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| POSTEMERGENCE |
|---|
| BRO |
DIC* |
DIF |
FOR |
GLY |
HAL |
NIC |
MTZ |
PAR* |
24D* |
| N | N | N | — | C | N | — | C | C | N |
| N | N | N | C | C | P | C | P | N | N |
| C | C | C | C | C | C | N | C | C | C |
| C | C | C | — | C | — | — | C | C | C |
| C | C | C | — | C | — | — | P | C | C |
| N | N | N | — | — | N | — | — | — | N |
| C | C | C | — | C | — | — | C | P | P |
| C | C | C | C | C | P | N | C | P | C |
| P | C | C | — | C | N | — | C | C | C |
| C | C | C | P | C | P | C | N | — | C |
| C | C | C | C | C | N | N | P | C | C |
| C | C | C | C | C | N | N | N | C | C |
| N | N | N | C | C | N | P | N | C | N |
| P | C | C | C | C | P | C | C | C | C |
| C | C | C | — | C | — | C | — | C | C |
| N | C | C | — | C | P | P | P | C | C |
| N | C | C | — | P | — | — | — | — | P |
| N | N | N | C | C | N | C | — | — | N |
| N | N | N | — | C | N | — | N | — | N |
| C | P | P | — | C | N | — | C | C | C |
| C | C | C | C | C | C | P | P | — | C |
| C | C | C | — | C | — | — | C | P | C |
| C | C | C | C | P | C | N | C | — | C |
| N | N | N | — | C | N | N | C | C | N |
| |
| N | N | N | N | C | N | N | N | N | N |
| N | N | N | N | C | N | — | N | P | N |
| N | P | P | N | C | — | — | P | N | P |
| P | C | C | N | C | — | — | P | P | C |
| N | — | — | C | C | N | C | — | N | — |
| N | N | N | C | C | N | C | N | N | N |
| N | N | N | C | C | N | C | N | P | N |
| N | — | — | — | C | — | — | — | N | — |
| N | C | C | — | C | N | — | — | N | C |
| N | N | N | N | P | C | N | N | N | N |
| N | N | N | N | P | C | N | P | N | N |
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| |
| 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 |
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Ratings Legend
| C | = control (Depends on weed size and herbicide rate) |
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) |
| DIM = dimethenamid (Outlook) |
| EPT = EPTC (Eradicane) |
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| 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 = halsulfuron/dicamba (Yukon) |
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Comments
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* Permit required from county agricultural commissioner for purchase or use.
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** Only for transgenic varieties of corn that contain specific herbicide-resistant genes.
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![[UC Peer Reviewed]](/IMAGES/logo-ucpeerreviewed.jpg)
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
M. L. Campbell-Mathews, UC Cooperative Extension, Stanislaus County
R. N. Vargas, UC Cooperative Extension, Madera County
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