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How to Manage Pests

UC Pest Management Guidelines


Field bindweed (morningglory), Convolvulus arvensis.

Pear

Susceptibility of Weeds to Herbicide Control

(Reviewed 2/07, updated 2/09)

In this Guideline: More about weeds in pear:

Susceptibility of Spring/Summer Weeds to Herbicide Control
Customize list of weeds
 
 
ANNUAL WEEDS
barnyardgrass
chickweed, common
cockleburs
crabgrass, large
cudweeds
fleabane, hairy
foxtails
goosefoot, nettleleaf
groundcherries
groundsel, common
horseweed
knotweed, common
ladysthumb
lambsquarters, common
lettuce, prickly
lovegrasses
mallow, little (cheeseweed)
nettles
nightshades
pigweeds
pineapple-weed
polypogon, rabbitfoot
puncturevine
purslane, common
sandburs
smartweed, pale
sowthistles
speedwell
spurges
thistle, Russian
witchgrass
PERENNIAL SEEDINGS
bermudagrass
bindweed, field
dallisgrass
dandelion
dock, curly
johnsongrass
ESTABLISHED PERENNIALS
asparagus
bermudagrass
bindweed, field
blackberries
clover, white
dallisgrass
dandelion
dock, curly
false dandelion, Carolina
johnsongrass
nutsedge, yellow
poison-oak, Pacific
smartweed, water
sorrel, red
PREEMERGENCE


DIC


DIU


ISO2


NAP


NOR


ORY


OXY


PEN


PRO


RIM


SIM


TRI2
CCNCCPCCCCPC
CCCCPCCCCCC
PCPCPNNNPPN
PCNCCPCCCCNC
CCPCCNNNNCCN
CCPNPPNNNCCN
CCNCCNCCCCCC
CCCCCCCPCPCC
CNCNCCCCCPCN
CNCPPCPPNCCN
CPPNPPNNNCCN
CCCCCCCCCPCC
CC
CCCCPCCCCPCC
CCCCPCNNNCCN
PCNCCPCCCPPC
CPPCCNPCN
CCPCCPCCNCN
CCCNCCNPCCCN
PCCCPCCCCCCC
CPCCCNCNPCN
CCCCPCCCCC
PCPPCPPPNPPP
CCCCPCCCCCCC
CCNCCNCCPC
CC
CPCCPCNNNCCN
PCCPPNC
CCCNPPPCPCCP
CCPPCPPPPNCP
PNCCPCCCC
 
CCNCCNCCCNPC
CNNNNCCPNPNP
CCNPCNCCCCN
CCCCCNCNNCCN
CCCPNPCCCPCC
CCNPCNPPCCPN
 
NNNNNNNN
NNNNPNNNNNNP
PNNNNPNNNPNP
NNNNNNNN
NNCNNNNNNPNN
NNNNNNNNNNN
PNNNNNNNPNN
NNNNNNNNNNNN
PNNCNNNN
NNNNNNNNNPNP
PNNNPNNNNPNN
NNNNNNNN
NNNNNNNN
PNNNNNNN
POSTEMERGENCE


24D


CAR


CLE2


FLM2


FLU


GLY


OXY


PAR*


SET
NNCCCNPC
PPNCNCPCN
CPNNCCCN
NNCPCCPCC
PNNCPNN
CNNCNCPCN
NNCCCNCC
CNNCPCN
CCNNCCCN
CNCNCCCN
CNNCNCPCN
PNNCPPN
NCPN
CNCNCCPN
CNNCCCN
NNCCCNCC
PCNNPCNN
PCNCNCPCN
CNNCNCCCN
PNNCCCN
PNNNCPCN
NNCCCNCC
CNNCPCN
CNNCNCCCN
NCCNPC
PNNCPN
CNNCNCCCN
NNNCPCN
PNNCCN
CNNCPPN
NNNCCNCC
 
NNCCCPCC
CCNNCCCN
NNPCCNCC
CNNPCCN
CNNPCCN
NNCCCNCC
 
NNPNNN
NNPPCNPP
PPNNPNPN
NNCNNN
PNCNPNNN
NNCPCNNP
CNNPNNN
CNNPNNN
NNPNNN
NNCPCNNP
NNNPNPNNN
NNCNNN
PNNCNNN
NNPNNN
COMBINATIONS

GLY1
ORY

GLY1
OXY
GLY1
SIM
ORY

OXY
ORY
CCCN
CCCP
CCCC
CCCP
CCCP
PCCP
CCCP
CCCC
CCCC
CCCC
PCCP
PCCP
CCCC
CCCC
CCCP
PCCC
CCCP
CCCC
CCCC
CCCP
CCCN
CCCP
CCCP
CCCP
CCCC
CCCP
CCCC
CCCP
CCCN
 
CCCC
CCCC
CCCP
PCCC
PCCC
CCCP
 
PPPN
CCCN
PNPP
NNNN
NNNN
NNNN
NNNN
NNNN
NNNN
NNNN
NNNN
NNNN
NNNN
NNNN
 
 
 
ANNUAL WEEDS
barnyardgrass
chickweed, common
cockleburs
crabgrass, large
cudweeds
fleabane, hairy
foxtails
goosefoot, nettleleaf
groundcherries
groundsel, common
horseweed
knotweed, common
ladysthumb
lambsquarters, common
lettuce, prickly
lovegrasses
mallow, little (cheeseweed)
nettles
nightshades
pigweeds
pineapple-weed
polypogon, rabbitfoot
puncturevine
purslane, common
sandburs
smartweed, pale
sowthistles
speedwell
spurges
thistle, Russian
witchgrass
PERENNIAL SEEDINGS
bermudagrass
bindweed, field
dallisgrass
dandelion
dock, curly
johnsongrass
ESTABLISHED PERENNIALS
asparagus
bermudagrass
bindweed, field
blackberries
clover, white
dallisgrass
dandelion
dock, curly
false dandelion, Carolina
johnsongrass
nutsedge, yellow
poison-oak, Pacific
smartweed, water
sorrel, red
Susceptibility of Winter Weeds to Herbicide Control
Customize list of weeds
 
 
ANNUAL WEEDS
barley, hare
bluegrass, annual
bromegrasses
canarygrasses
burclover, California
cudweeds
fiddlenecks
filarees
groundsel, common
henbit
miner's-lettuce
mustards
nettle
oat, wild
polypogon, rabbitfoot
radish, wild
redmaids (desert rockpurslane)
rocket, London
ryegrass, Italian
sheperd's-purse
sowthistles
sweetclover, yellow
PREEMERGENCE


DIC


DIU


FLM


ISO2


NAP


NOR


ORY


OXY


PEN


PRO


RIM


SIM


TRI2
CCNCCCPCCCCC
CCNCCCPCCCCC
CCNCCCPCCCCC
CCNCCCPCCCC
PPNNCPC
CCCCCNNNNCCN
CCCCCCCCCCCC
CCCCCNCCNCCN
CPCCCPNCPNCCN
CCCCPPPCCCCCC
CCCCCCCPCCC
CCCPPNCNCCCN
CCCCPCPCCCNCN
PPCNCPCPPPPCP
CCCPCCC
CCCPNNCNPCCN
CCNCCCCCC
CCCPCNCCCCCN
CNCCCPCCCCC
CCCCNCNCNCCCN
CCCCCPNCNNCCN
PCCPNNCPNC
POSTEMERGENCE


24D


CAR


CLE2


FLU


GLY


OXY


PAR*


SET
NNCCCPCC
NNCNCPCN
NNCCCNCC
NNCCCNCC
NNCPPN
PNNCPNN
PCNNCCCN
CNNPPPN
CNNCCCN
PNNCCCN
NNCCCN
CPNNCPCN
PCNNCPCN
NNCCCNCC
NNCCCCC
CPNNCPPN
NNCCCN
CCNNCCCN
NNCCCNCC
CPNNCPCN
CNNNCPCN
NNCPPN
COMBINATIONS

GLY
OXY

GLY
ORY
GLY
SIM
ORY

OXY
ORY
CCCP
CCCC
CCCP
CCCN
PPPP
CCCP
CCCC
CPCP
CCCC
CCCC
CCCC
CCCP
CCCP
CCCP
CCCN
CCCP
CCCC
CCCP
CCCN
CCCP
CCCP
PPPP
 
 
 
ANNUAL WEEDS
barley, hare
bluegrass, annual
bromegrasses
canarygrasses
burclover, California
cudweeds
fiddlenecks
filarees
groundsel, common
henbit
miner's-lettuce
mustards
nettle
oat, wild
polypogon, rabbitfoot
radish, wild
redmaids (desert rockpurslane)
rocket, London
ryegrass, Italian
sheperd's-purse
sowthistles
sweetclover, yellow

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

Chemical Legend
24D = 2,4-D (Orchard Master)
CAR = carfentrazone (Shark)
CLE = clethodim (Select Max)
DIC = dichlobenil (Casaron)
DIU = diuron (Karmex)
FLM = flumioxazin (Chateau)
FLU = fluazifop-p-butyl (Fusilade DX)
GLY = glyphosate (Roundup WeatherMax, etc.)
ISO = isoxaben (Gallery)
NAP = napropamide (Devrinol)
 
NOR = norflurazon (Solicam)
ORY = oryzalin (Surflan)
OXY = oxyfluorfen (GoalTender)
PAR = paraquat* (Gramoxone Inteon)
PEN = pendimethalin (Prowl H20)
PRO = pronamide (Kerb)
RIM = rimsulfuron (Matrix)
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.
2   Registered for use in nonbearing orchards only.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Pear
UC ANR Publication 3455
Weeds
R. B. Elkins, UC Cooperative Extension Lake County
W. T. Lanini, Weed Science/Plant Sciences, UC Davis
Acknowledgment for contributions to Weeds:
C. L. Elmore, Vegetable Crops/Weed Science, UC Davis
G. T. McGourty, UC Cooperative Extension Mendocino County

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