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How to Manage Pests

UC Pest Management Guidelines

| More pests | More crops | About guidelines |

Walnut

Susceptibility of Weeds to Herbicide Control

(Reviewed 12/07, updated 12/07)

In this Guideline: More about weeds in walnut:
Susceptibility of Winter Weeds to Herbicide Control
Customize list of weeds
 
 
ANNUAL WEEDS
barley, hare
bluegrass, annual
bromegrasses
canarygrass
clovers
cudweeds
fiddlenecks
filarees
groundsel, common
henbit
lettuce, miner's
mustards
nettles
oat, wild
polypogon, rabbitfoot
radish, wild
redmaids (desert rockpurslane)
rocket, London
ryegrasses
shepherd's-purse
sowthistles
PREEMERGENT


DIU

NAP

NOR

ORY

OXY

PEN

SIM

TRI
CCCCPCCC
CCCCPCCC
CCCCPCCC
CCCCPCCC
PPNNCPCN
CCCNNNCN
CCCCCCCP
CCCNCCCP
PCPNCPCN
CPPPCCCC
CCCCCCCC
CPCNCNCN
CNCPCNCN
PCPCPPCP
CCCCPCCC
CPPNCNCN
CNCCCCCC
CPCNCCCN
CCCCPCCC
CNCNCNCN
CCPNCNCN
POSTEMERGENT


24D*

FLU

GLY

OXY

PAR*

SET
NCCPCC
NNCPCN
NCCNCC
NCCNCC
PNCPPN
PNCPNN
PNCCCN
CNPPPN
CNCCCN
CNCCCN
CNCCCN
CNCPCN
CNCPCN
NCCNCC
NCCNCC
PNCPPN
CNCCCN
CNCCCN
NCCNCC
CNCPCN
CNCPCN
COMBINATIONS

ORY
OXY
GLY1
OXY
GLY1
ORY
GLY1
24D*		 GLY1
SIM
ORY
PCCCC
CCCCC
PCCCC
NCCCC
PPPPP
PCCCC
CCCCC
PCPCC
CCCCC
CCCCC
CCCCC
PCCCC
PCCCC
PCCCC
NCCCC
PCCCC
CCCCC
PCCCC
NCCCC
PCCCC
PCCCC
 
 
 
ANNUAL WEEDS
barley, hare
bluegrass, annual
bromegrasses
canarygrass
clovers
cudweeds
fiddlenecks
filarees
groundsel, common
henbit
lettuce, miner's
mustards
nettles
oat, wild
polypogon, rabbitfoot
radish, wild
redmaids (desert rockpurslane)
rocket, London
ryegrasses
shepherd's-purse
sowthistles
Susceptibility of Spring/Summer Weeds to Herbicide Control
Customize list of weeds
 
 
ANNUAL WEEDS
barnyardgrasses
chickweed, common
cockleburs
crabgrasses
cudweeds
fleabane, hairy
foxtails
goosefoot, nettleleaf
groundcherries
horseweed
knotweed, prostrate
lambsquarters, common
lettuce, prickly
lovegrasses
mallow, little (cheeseweed)
nettles
nightshades
pigweeds
pineapple-weed
polypogon, rabbitfoot
puncturevine
purslane, common
sandburs
sowthistles
speedwells
spurges
thistle, Russian
witchgrass
PERENNIAL SEEDINGS
bermudagrass
bindweed, field
dallisgrass
dandelion
dock, curly
johnsongrass
ESTABLISHED PERENNIALS
asparagus
bermudagrass
bindweed, field
blackberries
clovers
dallisgrass
dandelion
dock, curly
false dandelion
johnsongrass
nutsedge, yellow
onion, wild
poison-oak, Pacific
sorrel, red
PREEMERGENT


DIU

NAP

NOR

ORY

OXY

PEN

SIM

TRI
CCCCPCPC
CCCCPCCC
PCNNPNP—
CCCCPCNC
CCCNNCCN
CNPNPNCN
CCCCNCCC
CCCCCPCC
NNCCCCCN
PNPNPNCN
CCCCCCCC
CCPCCCCC
CCPNCNCN
CCCCPCPC
PPCNCPNP
CPCPCCCN
CNCNCPCN
CCPCCCCC
PCCNCCCP
CCCC—CCC
CPCPPPPP
CCPCCCCC
CCCCNCPC
PCPNCNCN
PC—PCPC—
CNCPPCCC
CPCPPPCP
PCCCPCCC
 
CCCCNCPC
NNNCCPNC
CPCCNCCC
CCNNCNCN
CPNPCCCC
CPCPNPPC
 
N—NN—NNN
NNPNNNNN
NNNPNNNP
NNNNNNNN
NNNNNNNN
NNNNNNNN
NNNNNNNN
NNNNNNNN
NNCNNNNN
NNNNNNNP
NNPNNNNN
———NN——N
NNNNNNNN
NNNNNNNN
POSTEMERGENT


24D*

FLU

GLY

OXY

PAR*

SET
NCCNPC
PNCPCN
CNCCCN
NCCPCC
PNCPNN
CNCPCN
NCCNCC
CNCPCN
CNCCCN
CNCPCN
NNCPPN
CNCCPN
CNCCCN
NCCNCC
CNPCNN
CNCPCN
CNCCCN
CNCCCN
CNCPCN
NCCNCC
CNCPCN
CNCCCN
NCCNPC
CNCCCN
PNCPCN
PNCPCN
PNCPPN
NCCNCC
 
NCCPCC
CNCCCN
NCCNCC
CNCCNN
CNCCCN
PCCNCC
 
NNPNNN
NPCNPP
PNPNPN
PNCNNN
PNPNNN
NPCNNP
CNPNNN
CNPNNN
CNPNNN
NPCNNP
PNPNNN
—N—N—N
PNCNNN
NNPNNN
COMBINATIONS

ORY
OXY
GLY1
OXY
GLY1
ORY
GLY1
24D*		 GLY1
SIM
ORY
NCCCC
CCPPP
PCCCC
CCCCC
PCCCC
PCPCC
PCCCC
CCCCC
CCCCC
CCCCC
PCPPC
CCCCC
PCCCC
PCCCC
CCCCC
PCCCC
CCCCC
PCCCC
PCCCC
NCCCC
NCCCC
PCCCC
PCCCC
CCCCC
PCCCC
CCCCC
NCCCC
NCCCC
 
CCCCC
PCCCC
CCCCC
CCCCC
CCCCC
PCCCC
 
NCC—C
NNN—N
NNN—N
NNN—N
NPP—P
NNN—N
PPP—P
NNN—N
NPP—P
NNN—N
NNN—N
—————
NNN—N
NNN—N
 
 
 
ANNUAL WEEDS
barnyardgrasses
chickweed, common
cockleburs
crabgrasses
cudweeds
fleabane, hairy
foxtails
goosefoot, nettleleaf
groundcherries
horseweed
knotweed, prostrate
lambsquarters, common
lettuce, prickly
lovegrasses
mallow, little (cheeseweed)
nettles
nightshades
pigweeds
pineapple-weed
polypogon, rabbitfoot
puncturevine
purslane, common
sandburs
sowthistles
speedwells
spurges
thistle, Russian
witchgrass
PERENNIAL SEEDINGS
bermudagrass
bindweed, field
dallisgrass
dandelion
dock, curly
johnsongrass
ESTABLISHED PERENNIALS
asparagus
bermudagrass
bindweed, field
blackberries
clovers
dallisgrass
dandelion
dock, curly
false dandelion
johnsongrass
nutsedge, yellow
onion, wild
poison-oak, Pacific
sorrel, red

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

Chemical Legend
24D = 2,4-D* (Orchard Master)
DIU = diuron (Karmex)
FLU = fluazifop-p-butyl (Fusilade DX)
GLY = glyphosate (Roundup, Touchdown)
NAP = napropamide (Devrinol)
NOR = norflurazon (Solicam)
ORY = oryzalin (Surflan)
 
OXY = oxyfluorfen (Goal)
PAR = paraquat* (Gramoxone Inteon)
PEN = pendimethalin (Prowl)
SET = sethoxydim (Poast)
SIM = simazine (Princep)
TRI = trifluralin (Treflan)
 

Comments
*   Permit required from county agricultural commissioner for purchase or use.
1   At rates used for annual weeds, control of perennials is less than expected with high label rates.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Walnut
UC ANR Publication 3471
Weeds
A. Shrestha, UC IPM Program/Kearney Agricultural Center, Parlier
R. B. Elkins, UC Cooperative Extension, Lake County
J. K. Hasey, UC Cooperative Extension, Sutter/Yuba Counties
K. K. Anderson, UC Cooperative Extension, Stanislaus County
Acknowledgment for contributions to Weeds:
C. L. Elmore, Weed Science/Plant Sciences, UC Davis
G. S. Sibbett, UC Cooperative Extension, Tulare County
W. O. Reil, UC Cooperative Extension, Yolo County
T. S. Prather, Plant, Soil, and Entomological Sciences, University of Idaho, Moscow, ID
J. J. Stapleton, UC IPM Program/Kearney Agricultural Center, Parlier
J. A. Grant, UC Cooperative Extension, San Joaquin County

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Statewide IPM Program, Agriculture and Natural Resources, University of California
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