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How to Manage Pests

UC Pest Management Guidelines

| More pests | More crops | About guidelines |

Cheeseweed infestation, little mallow infestation, Malva parviflora

Sugarbeet

Herbicide Treatment Table

(Reviewed 11/05, updated 11/05)

In this Guideline: More about weeds in sugarbeet:
Common name Amount/Acre P.H.I.+
(trade name)   (days)
BEFORE PLANTING    
Preplant foliar    
A. GLYPHOSATE
0.5-1.0 lb a.i.
  
  (Roundup, Touchdown)    
  COMMENTS: Apply to emerged annual weeds at least 3 days before sowing crop or before it emerges. Weeds should be less than 4 inches tall and vigorously growing. Observe label restrictions for application.
       
B. PARAQUAT*
0.5-0.1 lb a.i.
  
  (Gramoxone Max)    
  ...PLUS...    
  surfactant
8 oz/100 gal
  
  COMMENTS: Apply to emerged annual weeds before sowing crop or before it emerges. Grasses after tillering not well controlled. Avoid drift from treated area. Flush all spray equipment directly after use; paraquat may be corrosive to aluminum.
   
 

Preplant incorporated

A. CYCLOATE
3-4 lb a.i.
  
  (Ro-Neet 6E)    
  COMMENTS: Incorporate into soil immediately after application; use of power driven tiller preferred. Use only in mineral soils; lower rate in sandy soil, higher rate in heavy soils. May slow beet germination and seedling growth. Make only 1 application/growing season.
       
B. ETHOFUMESATE
1-2 lb a.i.
  
  (Nortron SC)    
  COMMENTS: Incorporate 1 to 2 inches deep with power-driven tiller. Temporary stunting with leaf fusion may occur.
       
C. PYRAZON
3-3.5 lb a.i.
  
  (Pyramin) DF    
  COMMENTS: Also known as chloridazon. Incorporate 1-2 in. deep with power driven tiller. If no rain falls within 5-10 days, furrow irrigate to thoroughly wet bed top. Do not use in sands, loamy sands, muck, or peat soils. Use lower rate on low organic matter sandy loam soils. Do not sprinkler irrigate until beets have 2 true leaves. Pyrazon is prone to settling out in the spray tank, so agitate continuously to avoid uneven application.
       
D. PYRAZON
3.11 lb a.i.
  
  (Pyramin) DF    
  ...PLUS...    
  ETHOFUMESATE
1.5-1.9 lb a.i.
  
  (Nortron)    
  COMMENTS: Incorporate 1-2 in. deep with power-driven tiller. If no rain falls within 5-10 days furrow irrigate to thoroughly wet bed top. Do not use in sands, loamy sands, muck, or peat soils. Use lower rate on low organic matter sandy loam soils. Do not sprinkler irrigate until beets have 2 true leaves. Temporary stunting and leaf fusion may occur. Pyrazon, also known as chloridazon, is prone to settling out in the spray tank; agitate continuously to avoid uneven application.
       
  AFTER PLANTING    
  Preemergence(Herbicides applied after planting but before irrigation)
       
A. ETHOFUMESATE
1.125-3.75 lb a.i.
  
  (Nortron SC)    
  COMMENTS: Temporary stunting with leaf fusion and twisting may occur.
       
B. PYRAZON
3-3.5 lb a.i.
  
  (Pyramin) DF    
  COMMENTS: Also known as chloridazon. If no rain falls within 5-10 days, sprinkler irrigate; do not use more than 0.75 in. of water per set until beets have 2 true leaves. If significant rainfall occurs after treatment, the risk of crop injury is increased. Do not use in sands, loamy sands, muck, or peat soils. Use lower rate on low organic matter sandy loam soils. Pyrazon is prone to settling out in the spray tank; agitate continuously to avoid uneven application.
       
C. PYRAZON
3.11 lb a.i.
  
  (Pyramin) DF    
  ...PLUS...    
  ETHOFUMESATE
1.5-1.9 lb a.i.
  
  (Nortron) SC    
  COMMENTS: If no rain falls within 5 -10 days, sprinkler irrigate; do not use more than 0.75 in. of water per set until beets have 2 true leaves. Do not use in sands, loamy sands, muck, or peat soils. Use lower rate on low organic matter sandy loam soils. Temporary stunting, with leaf fusion and twisting, may occur. Pyrazon, also known as chloridazon, is prone to settling out in the spray tank so agitate continuously to avoid uneven application.
       
  Postemergence (seedling stages)
A. CLETHODIM
0.09-0.25 lb a.i.
40
  (Prism)    
  ...PLUS...    
  N/S SURFACTANT    
  COMMENTS: Keep spray volume at 20-30 gpa for best activity. Adequate soil moisture required for best activity. Do not mix with other herbicides. Controls annual bluegrass when plants have fewer than 8 leaves. Perennial grasses may require repeat applications.
       
B. CLOPYRALID
0.1-0.25 lb a.i.
  
  (Stinger)    
  COMMENTS: Apply when crop and weeds are at cotyledon stage of growth; delayed application can increase risk of crop injury. Effective for controlling velvetleaf and cocklebur. It can be tank-mixed with UpBeet, Betamix, or Progress for broader weed control. Do not exceed 0.25 lb/acre/season. Refer to label for significant plant-back restrictions.
       
C. DESMEDIPHAM
1.0-1.22 lb a.i.
75
  (Betanex)    
  COMMENTS: Temporary sugarbeet stunting may occur, with possible sugarbeet kill at temperatures over 85°F. Adequate soil moisture must be present at application, or furrow irrigate after treatment. If pigweed is the primary species, desmedipham alone provides better control than in a mixture with phenmedipham. Does not have soil activity.
       
D. PHENMEDIPHAM/DESMEDIPHAM
0.24-0.75 lb a.i.
75
  (Betamix)    
  COMMENTS: Temporary sugarbeet stunting may occur, with possible sugarbeet kill at temperatures over 85°F. Treat cotyledon-stage beets for best results. Control is erratic if weeds are larger than 2-leaf stage. Adequate soil moisture must be present at application, or furrow irrigate after treatment. Application after 3:00 pm increases safety to crop. Split applications about 7 days apart (50% of rate applied at each application) are safer and more effective than single applications. Do not exceed 0.5 lb/acre at the first application when applying to cotyledon-stage beets.
       
E. PYRAZON
3-3.5 lb a.i.
  
  (Pyramin) DF    
  COMMENTS: Also known as chloridazon. Use on small broadleaf weed seedlings in the 2- to 4-leaf stage during the cool season (below 70°F). If no rain falls, irrigate within 4 days to move the herbicide into the weed root zone. Controls certain weeds resistant to mixtures of phenmedipham/desmedipham. Pyrazon requires continuous agitation of the spray tank to prevent uneven application.
       
F. PHENMEDIPHAM/DESMEDIPHAM
0.24 lb a.i.
75
  (Betamix)    
  ...PLUS...    
  ETHOFUMESATE
0.125 lb a.i.
  
  (Nortron)    
  COMMENTS: Temporary sugarbeet stunting may occur, with possible sugarbeet kill at temperatures over 85°F. Treat cotyledon-stage beets for best results. Control is erratic if weeds are larger than 2-leaf stage. Adequate soil moisture must be present at application, or furrow irrigate after treatment. Application after 3:00 pm increases safety to crop. Split applications about 7 days apart (50% of rate applied at each application) are safer and more effective than single applications. Do not exceed 0.5 lb/acre at the first application when applying to cotyledon-stage beets. This mixure can provide improved control of difficult-to-control weeds such as knotweed.
       
G. SETHOXYDIM
0.25-0.45 lb a.i.
60
  (Poast)    
  ...PLUS...    
  COC adjuvant
1 qt/acre
  
  COMMENTS: Keep spray volume 20-30 gpa low for best activity. Adequate soil moisture required for best activity. Do not mix with other herbicides. High spray volume leads to reduced activity; follow label restrictions in relation to spray volume to use. Will not control annual bluegrass; perennial grasses may require repeat treatments.
       
H. TRIFLUSULFURON METHYL
0.016-0.031 lb a.i.
60
  (UpBeet)    
  ...PLUS...    
  N/S SURFACTANT    
  COMMENTS: Apply as a split-sequential application 5-10 days apart, beginning at the cotyledon stage of the crop and weeds. Two applications required in most cases for effective control. It may be tank-mixed with Betamix, Progress, or Stinger to broaden weed control. Do not mix with grass herbicides (Poast or Prism). Use with caution to prevent weed resistance following other ALS-inhibiting herbicides, such as Raptor, Staple, or Matrix.
       
I. PHENMEDIPHAM/DESMEDIPHAM/ETHOFUMESATE
0.25-0.75 lb a.i.
75
  (Progress)    
  COMMENTS: A premixed herbicide applied as a split-sequential application 7 to 10 days apart, beginning at the crop and weed cotyledon stage. Can be tank-mixed with UpBeet and Stinger for broader weed control.
       
  LAYBY (after thinning)    
A. EPTC
2 lb a.i.
  
  (Eptam)    
  COMMENTS: Inject into irrigation water; use only where uniform irrigation can be achieved. Will not control emerged seedlings or established plants. Do not permit treated water to run off field or use it for irrigating other crops. Follow-up repeat application is required for best activity.
   
....or...
  
   
3 lb a.i
  
  COMMENTS: Must be thoroughly incorporated into soil.
       
B. TRIFLURALIN
0.75 lb a.i.
  
  (Treflan)    
  COMMENTS: Incorporate into soil immediately after application; use of ground-driven rolling cultivator is preferred. Avoid piling treated soil into the beet crowns. Field must be weed-free at treatment; does not control emerged weeds.
       
+ Preharvest interval. Do not apply within this many days of harvest.
* Permit required from county agricultural commissioner for purchase or use.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Sugarbeet
UC ANR Publication 3469
Weeds
K. J. Hembree, UC Cooperative Extension, Fresno Co.
Acknowledgment for contributions to the weeds section:
R. F. Norris, Vegetable Crops/Weed Science, UC Davis

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