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How to Manage Pests

UC Pest Management Guidelines


Avocado

Susceptibility of Weeds to Herbicide Control

(Reviewed 1/07, updated 8/08)

In this Guideline: More about weeds in avocado:

Susceptibility of Weeds to Herbicide Control in Avocado
Customize list of weeds
ANNUAL WEEDS
Grasses
barley, hare (wild barley)
barnyardgrass
bluegrass, annual
crabgrasses
foxtail, yellow
lovegrasses (stinkweeds)
oats, wild
ryegrass
sandbur, longspine
spangletop
witchgrass (fall panicum)
Broadleaves
cocklebur
goosefoot
groundsel, common
knotweed
lambsquarters
mallow, little (cheeseweed, malva)
mustards
nettle, burning
nightshade, black
nightshade, hairy
pigweed
puncturevine
purslane
sowthistle
starthistle, yellow
thistle, Russian
velvetleaf
PERENNIALS
Seedling
bermudagrass
bindweed, field
dallisgrass
johnsongrass
Established
bermudagrass
bindweed, field
dallisgrass
fescue
johnsongrass
nutsedge, purple
nutsedge, yellow
PREEMERGENCE
NOR1 SIM1
 
CC
PP
CC
PN
CC
PC
PC
CP
PC
PN
CC
 
CC
CC
PP
PC
PC
PP
PC
CC
CC
CC
PC
CP
PC
PC
C
CC
 
 
CP
NC
NC
CC
 
PN
NN
NN
C
PN
PN
PN
POSTEMERGENCE
GLY2 SET3
 
CP
CC
CN
CC
CC
C
CC
C4C
CC
CC
CC
 
CN
CN
CN
PN
CN
PN
CN
NN
CN
CN
CN
CN
PN
CN
CN
CN
PN
 
 
CC
CN
CC
CC
 
CP
PN
C
C
CC
PN
PN
 
ANNUAL WEEDS
Grasses
barley, hare (wild barley)
barnyardgrass
bluegrass, annual
crabgrasses
foxtail, yellow
lovegrasses (stinkweeds)
oats, wild
ryegrass
sandbur, longspine
spangletop
witchgrass (fall panicum)
Broadleaves
cocklebur
goosefoot
groundsel, common
knotweed
lambsquarters
mallow, little (cheeseweed, malva)
mustards
nettle, burning
nightshade, black
nightshade, hairy
pigweed
puncturevine
purslane
sowthistle
starthistle, yellow
thistle, Russian
velvetleaf
PERENNIALS
Seedling
bermudagrass
bindweed, field
dallisgrass
johnsongrass
Established
bermudagrass
bindweed, field
dallisgrass
fescue
johnsongrass
nutsedge, purple
nutsedge, yellow
Ratings Legend
C= control P= partial control N= no control = no information

Chemical Legend
GLY = glyphosate (Roundup, Touchdown etc.)
NOR = norflurazon (Solicam)
 
SET = sethoxydim (Poast)
SIM = simazine (Princep)

Comments
1   Considered to be a ground water contaminant and requires a use permit within Ground Water Protection Areas.
2   Contact with spray or drift can severely damage avocado.
3   For use on nonbearing trees only.
4   Some populations of rigid ryegrass (Lolium rigidum) are resistant to glyphosate.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Avocado
UC ANR Publication 3436
Weeds
B. A. Faber, UC Cooperative Extension, Santa Barbara/Ventura counties
A. Shrestha, UC Statewide IPM Program, Kearney Agricultural Center, Parlier
W. T. Lanini, Weed Science/Plant Sciences, UC Davis
C. A. Wilen, UC Statewide IPM Program, San Diego County
P. A. Phillips, UC IPM Program, UC Cooperative Extension, Ventura County

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