Pear

Pest Management Guidelines

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Susceptibility of Weeds in Pear to Herbicide Control

(Reviewed 11/12 , updated 11/12 )

In this Guideline: More about weeds in pear:

Spring and Summer Weeds in Pear
  PREEMERGENCE POSTEMERGENCE
Customize WEED LIST DIC DIU ISO2 NOR ORY OXY PEN PRO RIM SIM 24D CAR CLE2 FLM2 FLU GLY OXY PAR* SET
ANNUAL WEEDS  
Barnyardgrass C C N C P C C C C P N N C — C C N P C
Chickweed, Common C C — C P C C C C C P P N C N C P C N
Cockleburs P C P — P N N N P P C P N — N C C C N
Crabgrass, Large P C N C P C C C C N N N C P C C P C C
Cudweeds C C P C N N N N C C P — N — N C P N N
Fleabane, Hairy C C P P P N N N C C C N N C N C P C N
Foxtails C C N C N C C C C C N N C — C C N C C
Goosefoot, Nettleleaf C C C C C C P C P C C — N — N C P C N
Groundcherries C N C C C C C C P C C C N — N C C C N
Groundsel, Common C N C P C P P N C C C — N C N C C C N
Horseweed C P P P P N N N C C C N N C N C P C N
Knotweed, Common C C C C C C C C P C P — N — N C P P N
Ladysthumb — C — — — — — — — C — — — — N C — P N
Lambsquarters, Common C C C P C C C C P C C — N C N C C P N
Lettuce, Prickly C C C P C N N N C C C — N — N C C C N
Lovegrasses P C N C P C C C P P N N C — C C N C C
Mallow, Little (Cheeseweed) C P — C C N P — C N P C N — N P C N N
Nettles C C — C C P C C N C P C N C N C P C N
Nightshades C C C C C N P C C C C N N C N C C C N
Pigweeds P C C P C C C C C C P — N — N C C C N
Pineapple-weed C P — C C N C N P C P N N — N C P C N
Polypogon, Rabbitfoot C C — C P C C — C C N N C — C C N C C
Puncturevine P C P C P P P N P P C — N — N C P C N
Purslane, Common C C C P C C C C C C C N N C N C C C N
Sandburs C C N C N C C — — P — — N — C C N P C
Smartweed, Pale — C — — — — — — — C P — N — N C — P N
Sowthistles C P C P C N N N C C C N N C N C C C N
Speedwell — P — — C P P — N C — N N — N C P C N
Spurges C C C P P P C P C C P — N — N C — C N
Thistle, Russian C C P C P P P P N C C — N — N C P P N
Witchgrass — P N C P C C — C C N N — N C C N C C
PERENNIAL SEEDINGS  
Bermudagrass C C N C N C C C N P N N C — C C P C C
Bindweed, Field C N N N C C P N P N C C N — N C C C N
Dallisgrass C C N C N C C C — C N N P — C C N C C
Dandelion C C C C N C N N C C C — N — N P C C N
Dock, Curly C C C N P C C C P C C — N — N P C C N
Johnsongrass C C N C N P P C C P N N C — C C N C C
ESTABLISHED PERENNIALS  
Asparagus N N — N N N N — — N — — N — N P N N N
Bermudagrass N N N P N N N N N N N N P — P C N P P
Bindweed, field P N N N P N N N P N P P N — N P N P N
Blackberries N N — N N N N — — N — — N — N C N N N
Clover, White N N C N N N N N P N P — N C N P N N N
Dallisgrass N N N N N N N N — N N N C — P C N N P
Dandelion P N — N N N N N P N C — N — N P N N N
Dock, Curly N N N N N N N N N N C — N — N P N N N
Johnsongrass N N N N N N N N P N N N C — P C N N P
Nutsedge, yellow P N N P N N N N P N N N N P N P N N N
Poison-oak, Pacific N N — N N N N — — N — — N — N C N N N
Smartweed, Water N N — N N N N — — N P — N — N C N N N
Sorrel, Red P N — N N N N — — N — — N — N P N N N

Winter Weeds in Pear
  PREEMERGENCE POSTEMERGENCE
Customize WEED LIST DIC DIU ISO1 NOR ORY OXY PEN PRO RIM SIM 24D CAR CLE1 FLU GLY OXY PAR* SET
ANNUAL WEEDS  
Barley, Hare C C N C C P C C C C N N C C C P C C
Bluegrass, Annual C C N C C P C C C C N N C N C P C N
Bromegrasses C C N C C P C C C C N N C C C N C C
Canarygrasses C C N C C P C C — C N N C C C N C C
Burclover, California — P — N N C P — — C — — N N C P P N
Cudweeds C C C C N N N N C C P — N N C P N N
Fiddlenecks C C C C C C C C C C P C N N C C C N
Filarees C C C C N C C N C C C — N N P P P N
Groundsel, Common C P C P N C P N C C C — N N C C C N
Henbit C C C P P C C C C C P — N N C C C N
Miner's Lettuce C C — C C C C P C C — — N N C C C N
Mustards C C C P N C N C C C C P N N C P C N
Nettle C C C C P C C C N C P C N N C P C N
Oat, Wild P P N P C P P P P C N N C C C N C C
Polypogon, Rabbitfoot — — — C C P C — C — N N C C C — C C
Radish, Wild C C C N N C N P C C C P N N C P P N
Redmaids (Desert Rockpurslane) C C — C C C C — C C — — N N C C C N
Rocket, London C C C C N C C C C C C C N N C C C N
Ryegrass, Italian — C N C C P C C C C N N C C C N C C
Shepherd's-purse C C C C N C N C C C C P N N C P C N
Sowthistles C C C P N C N N C C C N N N C P C N
Sweetclover, Yellow — P C N N C P N — C — — N N C P P N

Ratings Legend
C= control    P= partial control    N= no control    —= no information

Chemical Legend
24D = 2,4-D (Orchard Master) NOR = norflurazon (Solicam)
CAR = carfentrazone (Shark) ORY = oryzalin (Surflan)
CLE = clethodim (Select Max) OXY = oxyfluorfen (GoalTender)
DIC = dichlobenil (Casaron) PAR = paraquat* (Gramoxone Inteon)
DIU = diuron (Karmex) PEN = pendimethalin (Prowl H20)
FLM = flumioxazin (Chateau) PRO = pronamide (Kerb)
FLU = fluazifop-p-butyl (Fusilade DX) RIM = rimsulfuron (Matrix)
GLY = glyphosate (Roundup WeatherMax, etc) SET = sethoxydim (Poast)
ISO = isoxaben (Gallery) SIM = simazine (Princep)

Comments
* Permit required from county agricultural commissioner for purchase or use.
1 At rates used for annual weeds, control of perennials is less than expected with high label rates.
2 Registered for use in nonbearing orchards only.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Pear
UC ANR Publication 3455

Weeds

R. B. Elkins, UC Cooperative Extension Lake County
W. T. Lanini, Weed Science/Plant Sciences, UC Davis
Acknowledgment for contributions to Weeds:
C. L. Elmore, Vegetable Crops/Weed Science, UC Davis
G. T. McGourty, UC Cooperative Extension Mendocino County

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