Walnut

Pest Management Guidelines


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
PREEMERGENCE


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
POSTEMERGENCE


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
PREEMERGENCE


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
CCCCCCC
CPCPPPPP
CCPCCCCC
CCCCNCPC
PCPNCNCN
PCPCPC
CNCPPCCC
CPCPPPCP
PCCCPCCC
 
CCCCNCPC
NNNCCPNC
CPCCNCCC
CCNNCNCN
CPNPCCCC
CPCPNPPC
 
NNNNNN
NNPNNNNN
NNNPNNNP
NNNNNNNN
NNNNNNNN
NNNNNNNN
NNNNNNNN
NNNNNNNN
NNCNNNNN
NNNNNNNP
NNPNNNNN
NNN
NNNNNNNN
NNNNNNNN
POSTEMERGENCE


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
NNN
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
 
NCCC
NNNN
NNNN
NNNN
NPPP
NNNN
PPPP
NNNN
NPPP
NNNN
NNNN
NNNN
NNNN
 
 
 
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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