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Agriculture: Olive Pest Management Guidelines

Susceptibility of Weeds to Herbicide Control

Weeds Pages

Susceptibility of Spring and Summer Weeds to Herbicide Control
  PREEMERGENCE     POSTEMERGENCE
DIU FLM IND ISO ORY PEN OXY SIM CAR CLE FLU GLY OXY PAR* PYR SET
Mode of Action1 7 14 29 21 3 3 14 5 14 1 1 9 14 22 14 1
ANNUAL GRASSES
Barnyardgrass C — C N C C P P     N C C C N P N C
Crabgrasses C P C N C C P N N C C C P C N C
Foxtails C — C N C C N C N C C C N C N C
Lovegrasses C — C — C C P — N C C C N C N C
Sandburs C — — N C C N P N C C C N P N C
Sprangletops N — C N C C P N N C C C N C N C
Witchgrass P — P — C — P C N C C C N C N C
ANNUAL BROADLEAVES
Cockleburs C — — — N N C C     P N N C C C P N
Cudweeds C — — C N N N C — N N C P N — N
Fleabane, Hairy C C C C N N P C N N N C P C P N
Fluvellins P — P — N — P P — N N P P P — N
Goosefoot, Nettleleaf C C — C C C C C — N N C C C — N
Groundcherries C C — C C N C C C N N C C C — N
Knotweeds C C P C C C C C — N N C P P P N
Lambsquarters, Common C C C C C C C C — N N C C P P N
Lettuce, Prickly C C P C N N C C — N N C C C P N
Mallow, Little (Cheeseweed) C C C C P P C N C N N P C N P N
Nightshades C C — C N N C C C N N C C C P N
Pigweeds C C C C C C C C C N N C C C P N
Puncturevine C — — C P P C P — N N C C C — N
Purslane, Common C C C C C C C C N N N C C C C N
Speedwells P — — — P — C C N N N C P C — N
Starthistle, Yellow C C — — N N C C N N N C C P — N
Thistle, Russian P — C C P P P P — N N C P C — N
Velvetleaf C — C C P N C C C N N C N P C N
Willowherb, Tall Annual (Panicle-leaf) C C C P C — C C — N N P — P P N
PERENNIALS (SEEDLINGS)
Bermudagrass N — C N C C N P   N C C C — P N C
Bindweed, Field C — C C P P N C C N N C N P P N
Dallisgrass C — — N C C N C N P — C N N N C
Dandelion C — C C N N C C — N N C C N P N
Dock, Curly C — — C P C C C — N N C C C — N
Johnsongrass C — N N C C C C N C C C N C N C
ESTABLISHED PERENNIALS
Asparagus N — N — N — N N     — N N P N N — N
Bermudagrass N — N N N N N N N P P C N P N P
Bindweed, Field N N N C P N N N P N N P N P P N
Blackberries N — N — N N N N — N N C N N N N
Catsear, Common N — N — N — N N — N N P N N — N
Clovers P — — — N N P C — N N P N N P N
Dallisgrass N — — N N N N N N N P C N N N N
Dandelion N — N C N N N N — N N C N N P N
Dock, Curly N — — N N N N N — N N P N N — N
Johnsongrass N — — N N N N N N N P C N N N N
Nutsedge, Yellow N P P N N N N N N N N P N N N N
Poison-Oak, Pacific N — — — N N N N — N N C N N — N
Smartweeds C — — — N — N C — N N C N N — N
Sorrel, Red N — — — N — N N — N N P N N — N

Susceptibility of Winter Weeds to Herbicide Control
  PREEMERGENCE     POSTEMERGENCE
DIU FLM ISO IND ORY OXY PEN SIM CAR CLE FLU GLY OXY PAR* PYR SET
Mode of Action1 7 14 21 29 3 14 3 5 14 1 1 9 14 22 14 1
ANNUAL GRASSES
Barley, Hare C — N C C P C C     N C C C P C N C
Bluegrass, Annual C — N C C P C C N P N C P C N N
Bromegrasses C — N C C P C C N C C C N C N C
Canarygrass C — N — C P C — N C C C N C N C
Oat, Wild P C N C P P P C N C C C N C N C
Polypogon, Rabbitfoot C — — — C P C — N C C C — C N C
Ryegrass, Italian C — N C C P C C N C C C N C N C
ANNUAL BROADLEAVES
Chickweed, Common C C C C C P C C     P N N C P C P N
Clovers P — — P N P N P — N N C P P P N
Fiddlenecks C C C C C C C C C N N C C C — N
Filarees C C C C N C N C — N N P C C N N
Groundsel, Common N C C C P C N C — N N C C C N N
Henbit C C C P P C C C — N N C C C P N
Lettuce, Miner's C C C — C C — C — N N C C C — N
Mustards C C C C N C N C P N N C P C P N
Nettles C C C C P C N C C N N P C P P N
Pineappleweed P C — — N C N C N N N C P P — N
Radish, Wild C — C — N C N C P N N C P P — N
Redmaids C C — C C C — C — N N C C C P N
Rocket, London C — C C P C P C C N N C C C P N
Shepherd's-Purse C C C C N C P C P N N C P C P N
Sowthistles C C C C P C N C N N N C C C P N
C= control    P= partial control    N= no control    —= no information
Herbicide Mode of
action		 Herbicide Mode of action
CAR = carfentrazone (Shark) 14 ORY = oryzalin (Surflan) 3
CLE = clethodim (Select Max) 1 OXY = oxyfluorfen (GoalTender) 14
DIU = diuron (Karmex, etc.) 7 PAR = paraquat* (Gramoxone Inteon) 22
FLM = flumioxazin (Chateau) 14 PEN = pendimethalin (Prowl H2O) 3
FLU = fluazifop-p-butyl (Fusilade) 1 PYR = pyraflufen-ethyl (Venue) 14
GLY = glyphosate (Roundup, etc.) 9 SET = sethoxydim (Poast) 1
ISO = isoxaben (Gallery) 21 SIM = simazine (Princep, etc.) 5
IND = indaziflam (Alion) 29    

 

* Permit required from county agricultural commissioner for purchase or use.
1 Group numbers are assigned by the Weed Science Society of America (WSSA) according to different modes of action. Although weeds may exhibit multiple resistance across many groups, mode-of-action numbers are useful in planning mixtures or rotations of herbicides with different modes of action. For more information, see http://www.hracglobal.com.

Text Updated: 03/14

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