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Agriculture: Pistachio Pest Management Guidelines

Susceptibility of Weeds to Herbicide Control

Weeds Pages

Susceptibility of Spring/Summer Weeds to Herbicide Control

PREEMERGENCE POSTEMERGENCE
FLM IND ISO1 ORY OXY PEN1 PEO CLE1 DIQ1 FLU1 GLY OXY PAR SAF SET1 2,4-D
Mode of Action2 14 29 21 3 14 3 2+14 1 22 1 9 14 22 14 1 4
ANNUAL WEEDS
Grasses
Barnyardgrass C C N C P C P C P C C P P N C N
Crabgrass, Large C C N C P C P C P C C N C N C N
Fescues C C N C P C P P C P C N C N P N
Foxtails C C N C N C N C P C C N C N C N
Lovegrasses C C N C P C P C P C C N P N C N
Sprangletops C C N C P C P C P C C P P N C N
Witchgrass C — N C P C P C P P C N C N P N
Broadleaves
Cockleburs — — — N P N — N C N C C C C N C
Cudweeds — C C N P N C N C N C C C — N N
Eveningprimrose, Cutleaf — P C P P P C N C N C P C — N —
Fleabane, Hairy C C C N P N C N P N C P P C N P
Goosefoot, Nettleleaf C C C C C C C N C N C C C C N C
Groundcherries C — C N C N P N C N C C C C N P
Horseweed C C C N P N C N C N C P C C N P
Knotweed, Common C P C C C C P N P N C N P — N C
Lambsquarters, Common C C C C C C C N C N C C P C N C
Lettuce, Prickly C P C N C N C N C N C P P C N C
Mullein, Turkey — — C N P P C N P N C N C — N P
Nightshades C C C N C N C N C N C C C C N C
Pigweeds C C C C C C C N C N C C C C N P
Puncturevine — — C P P P P N C N C P C C N C
Purslane, Common C C C C C C C N C N C P N C C C
Sowthistles C C C P C N C N C N C C C C N C
Spurge, Spotted — C C P P P P N C N C N C C N N
Thistle, Russian — C C P P P C N P N C N C C N P
Willowherb, Panicle-Leaf C C C P C P C N P N P N P C N —
PERENNIALS
Seedlings
Bermudagrass — — N C P C N C P C C N C N C N
Bindweed, Field — — P P C P P N C N C N C C N C
Clovers C P N N P N C N P N C N P P N N
Dallisgrass — — N C N C N C P C C N C N C N
Dock, Curly — — C P C C — N C N C C C C N C
Johnsongrass — — N C P C N C P C C N C N C N
Established Perennials
Bermudagrass — N N N N N N P N P C N P N P N
Bindweed, Field N N N P N P N N P N P N P N N P
Clovers — P N N N N N N N N P N N P N N
Dallisgrass — N N N N N N P N P C N N N P N
Dock, Curly — — N N N N N N N N P N N N N N
Johnsongrass — N N N N P N P N P C N N N P N
Nutsedge, Purple N N N N N N N N P N P N P N N N
Nutsedge, Yellow P N N N N N N N P N P N P N N N

Susceptibility of Winter Weeds to Herbicide Control

PREEMERGENCE POSTEMERGENCE
FLM IND ISO1 ORY OXY PEN1 PEO CLE1 DIQ1 FLU1 GLY OXY PAR* SAF SET1 2,4-D
Mode of Action2 14 29 21 3 14 3 2+14 1 22 1 9 14 22 14 1 4
ANNUAL WEEDS
Grasses
Barley, Hare C C N C P C P C P C C N C N C N
Bluegrass, Annual C C N C P C C C P N C N C N N N
Bromegrasses C C N C P C P P P P C N C N P N
Oat, Wild C C N P P P P C P C C N C N C N
Ryegrass, Italian C C N C P C P C P C C N C N C N
Broadleaves
Chickweed, Common C C C C P C C N C N C N C — N C
Cudweeds — C C N N N C N C N C C C — N N
Fiddlenecks C C C C C C C N C N C C C — N C
Filarees C C C P C P C N C N P C C C N C
Groundsel, Common C C C P C N C N C N C C C C N P
Henbit C P C P C C C N C N C C C — N C
Mallow, Little (Cheeseweed) C C C P C P C N C N P C P C N C
Mustards C C C N C P C N C N C P C C N C
Nettle, Burning C C C P C C C N P N N P P C N C
Radish, Wild — — C P C P C N C N C P C C N C
Rocket, London — C C P C P C N C N C P C — N C
Shepherd's-Purse C C C N C P C N C N C C C C N C
C= control P= partial control N= no control —= no information
2,4-D = (Orchard Master, etc.) MOA: 4 ORY = oryzalin (Surflan, Oryzalin) MOA: 3
CLE = clethodim (Select Max) MOA: 1 OXY = oxyfluorfen (Goal) MOA: 14
DIQ = diquat (Reglone) MOA: 22 PAR = paraquat (Gramoxone) MOA: 22
FLM = flumioxazin (Chateau) MOA: 14 PEN = pendimethalin (Prowl) MOA: 3
FLU = fluazifop-p-butyl (Fusilade DX) MOA: 1 PEO = penoxsulam + oxyfluorfen (Pindar GT) MOA: 2+14
GLY = glyphosate (Roundup PowerMax, Touchdown) MOA: 9 SAF = salflufenacil (Treevix) MOA: 14
IND = indaziflam (Alion) MOA: 29 SET = sethoxydim (Poast) MOA: 1
ISO = isoxaben (Trellis) MOA: 21
* Permit required from county agricultural commissioner for purchase or use.
1 For use in nonbearing orchards only.
2 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.

Text Updated: 10/14

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