Avocado

Agricultural pest management


Susceptibility of Weeds to Herbicide Control

(Reviewed 9/16, updated 9/16)

In this Guideline: More about weeds in avocado:

Susceptibility of Weeds to Herbicide Control in Avocado
  PREEMERGENCE POSTEMERGENCE
Customize list of weeds FLU3 ISO3 NOR1 ORY OXY SIM1 CAR2 FLA3 GLY2 PAR2 SET3
ANNUAL WEEDS
Grasses
barley, hare (wild barley) N N C C N C N N C P P
barnyardgrass C N P C P P N C C P C
bluegrass, annual C N C C P C N N C P N
Crabgrasses N N P C N N N C C C C
foxtail, yellow C N C C C C N C C C C
lovegrasses (stinkweeds) C N P C C C N N C P
oats, wild N N P C P C N C C P C
ryegrass N N C C N P N C C4 P C
sandbur, longspine N N P P N C N N C P C
spangletop N N P C N N N N C N C
witchgrass (fall panicum) N N C C N C N C C P C
Broadleaves
cocklebur C C N C C N N C C N
fleabane, hairy C C C N C C P N C4 P N
goosefoot N C C C C C N N C C N
groundsel, common C C P N C P N N C C N
horseweed (mare's tail) C C C N C C P N C4 P N
knotweed N C P C P C N N P P N
lambsquarters C C P C C C C N C C N
lettuce, prickly C   P N C C C N C C N
mallow, little (cheeseweed, malva) C C P P C P C N P N N
mustards C C P N P C N N C C N
nettle, burning N C C P C C N N N P N
nightshade, black C C C N C C C N C C N
nightshade, hairy C C C N C C C N C C N
pigweed C C P C C C C N C C N
puncturevine C C C P C P N N C C N
purslane C C P C C C N N P C N
sowthistle N C P N C C C N C P N
spurge, prostrate N C P C P N N N C C N
starthistle, yellow N N N C C N N C C N
thistle, Russian C C C P P C N N C C N
velvetleaf C C N C N P C N
PERENNIALS
Seedling
bermudagrass N N C C N P N C C N C
bindweed, field P C N P N C N N C P N
dallisgrass N N N C N C N N C N C
johnsongrass C N C C N C N C C N C
Established
bermudagrass N N P N N N N P C   P
bindweed, field P C N N N N N N P N N
dallisgrass N N N N N N N N C N
fescue N C N N C  
johnsongrass C N P N N N N C C N C
nutsedge, purple N N P N N N N N P N N
nutsedge, yellow N N P N N N N N P N N
Ratings Legend
C= control P= partial control N= no control = no information
CAR = carfentrazone (Shark)   1 Considered to be a ground water contaminant and requires a use permit within Ground Water Protection Areas.
FLA = fluazifop-p-butyl (Fusilade DX) 2 Contact with spray or drift can severely damage avocado.
FLU = flumioxazin (Chateau) 3 For use on nonbearing trees only.
GLY = glyphosate (Roundup, Touchdown etc.) 4 Some populations of rigid ryegrass, horseweed, and hairy fleabane) are resistant to glyphosate.
ISO = isoxaben (Gallery)  
NOR = norflurazon (Solicam)  
ORY = oryzalin (Surflan)  
OXY = oxyfluorfen (Goal, GoalTender)  
PAR = paraquat (Gramoxone)  
SET = sethoxydim (Poast)  
SIM = simazine (Princep)  

[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
C. A. Wilen, UC Statewide IPM Program, San Diego County
B. D. Hanson, Plant Sciences, UC Davis

Acknowledgment for contributions to Weeds:
W. T. Lanini, Weed Science/Plant Sciences, UC Davis
A. Shrestha, UC Statewide IPM Program, Kearney Agricultural Center, Parlier
P. A. Phillips, UC IPM Program, UC Cooperative Extension, Ventura County

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