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How to Manage Pests

UC Pest Management Guidelines

| More pests | More crops | About guidelines |

Common lambsquarters, Chenopodium album.

Celery

Herbicide Treatment Table

(Reviewed 10/05, updated 6/08)

In this Guideline: More about weeds in celery:
Herbicide Amount/Acre R.E.I.+ P.H.I.+
(trade name)   (hours) (days)
BEFORE PLANTING
A. TRIFLURALIN 0.5–1 lb a.i.    
  (Treflan) HFP 1–2 pt 12 NA
  COMMENTS: Preplant incorporate 2–3 inches deep. Use high rate on clay soils.
   
B. GLYPHOSATE
  (Roundup) 2 lb a.i.    
    2 qt 12 NA
  . . . or . . .
  (Touchdown) 0.9375 lb a.i.    
    1.25 qt 12 NA
  COMMENTS: Apply to seedling weeds before seeding or before celery emergence.
 
C. OXYFLUORFEN 0.25–0.5 lb a.i.    
  (Goal) 2XL 1–2 pt 24 NA
  COMMENTS: Apply to fallow beds at least 30 days before transplanting. After application, thoroughly work the fallow beds to a depth of at least 2.5 inches before planting.
 
D. NONANOIC ACID
  (Scythe) Label rates 12 NA
 
BEFORE TRANSPLANTING
A. PROMETRYN 1–2 lb a.i.    
  (Caparol) 4L 2–4 pt 24 45
  COMMENTS: Apply only 1 application in a minimum of 20 gal water/acre during the 2- to 6-week period before transplanting. Application may be made over the celery. Apply before weeds are 2 inches tall. On coarse-textured soils and low organic matter soils, make one application of 2–4 pt/acre. On fine-textured soils, use 3.2–4 pt/acre. Make the application up to 21 days before transplanting. Note: A post-transplant application is not allowed if the pre-transplant application was made at the maximum allowable use rate of 4 pt/acre. Use allowed under a 24(c) registration.
 
B. BENSULIDE 5–6 lb a.i.    
  (Prefar) 4-E 5–6 qt 12 0
 
AT PLANTING (DIRECT-SEEDED)
A. PROMETRYN 1.2–1.6 lb a.i.    
  (Caparol) 4L 2.4–3.2 pt 24 NA
  COMMENTS: Apply after seeding. Sprinkler irrigate within 48 hours. Apply at least 1 inch of water. Do not use on sand or loamy sand.
 
B. BENSULIDE 5–6 lb a.i.    
  (Prefar) 4-E 5–6 qt 12 NA
 
AFTER PLANTING
A. PROMETRYN 1–2 lb a.i.    
  (Caparol) 4L 2–4 pt 24 45
  COMMENTS: For transplanted celery; apply during the 2- to 6-week period after transplanting. Actual dosage will depend on soil texture; use lower rate on coarse-textured soils. DO NOT USE SURFACTANT. Apply before weeds are 2 inches tall. May cause detectable plant injury if warm weather follows application, but celery usually outgrows the injury without a significant reduction in yield or quality.
 
B. LINURON 0.75–1 lb a.i.    
  (Lorox) DF 1.5–2 lb 24 67
  COMMENTS: Use only on transplants; do not use after celery is 8 inches high. Do not apply in less than 20 gal water/acre by ground. Rate is determined by the size of the weed and soil type. With younger weeds lower rate may be used. May cause detectable plant injury if warm weather follows application, but celery usually outgrows the injury without a significant reduction in yield or quality.
 
C. SETHOXYDIM 0.1875–0.28 lb a.i. 12 30
  (Poast) 1–1.5 pt  
  COMMENTS: Apply when celery has at least 2 true leaves. Use an approved oil concentrate at 2 pt/acre.
 
D. CLETHODIM 0.095–0.1248 lb a.i. 24 30
  (Prism) 13–17 fl oz  
  COMMENTS: Use an approved crop oil concentrate at 1% (volume by volume).
 
+ Restricted entry interval (R.E.I.) is the number of hours (unless otherwise noted) from treatment until the treated area can be safely entered without protective clothing. Preharvest interval (P.H.I.) is the number of days from treatment to harvest. In some cases the REI exceeds the PHI. The longer of two intervals is the minimum time that must elapse before harvest.
NA Not applicable.

[Precautions]

PUBLICATION

[UC Peer Reviewed]

UC IPM Pest Management Guidelines: Celery
UC ANR Publication 3439
Weeds
R. F. Smith, UC Cooperative Extension, Monterey County
Acknowledgment for contributions to Weeds:
C. E. Bell, UC Cooperative Extension, San Diego County
W. E. Bendixen, UC Cooperative Extension, Santa Barbara County
R. J. Mullen, UC Cooperative Extension, San Joaquin County

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