1. UC IPM
  2. Agriculture
  3. Avocado
  4. Susceptibility of Weeds to Herbicide Control

Agriculture: Avocado Pest Management Guidelines

Susceptibility of Weeds to Herbicide Control

Weeds Pages

  PREEMERGENCE   POSTEMERGENCE
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
sprangletop N N P C N N N N C N C
witchgrass 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
C= control P= partial control N= no control —= no information
CAR = carfentrazone (Shark)   ORY = oryzalin (Surflan)
FLA = fluazifop-p-butyl (Fusilade DX) OXY = oxyfluorfen (Goal, GoalTender)
FLU = flumioxazin (Chateau) PAR = paraquat (Gramoxone)
GLY = glyphosate (Roundup, Touchdown etc.) SET = sethoxydim (Poast)
ISO = isoxaben (Gallery) SIM = simazine (Princep)
NOR = norflurazon (Solicam)    
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, horseweed, and hairy fleabane) are resistant to glyphosate.

Text Updated: 09/16

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