Not all registered pesticides are listed. The following are listed alphabetically. When choosing a pesticide, consider information relating to environmental impact, resistance management, the pesticide’s properties, and application timing. Tank mixes may be necessary to achieve desired control; see Susceptibility of Weeds to Herbicide Control for information on specific weed control. Always read the label of the product being used.
BEFORE PLANTING
BENSULIDE
5–6 lb a.i.
(Prefar 4-E)
5–6 qt
12
NA
WSSA MODE-OF-ACTION GROUP NUMBER1: UN
FLUMIOXAZIN
0.95 lb a.i.
(Chateau EZ)
3 fl oz
12
NA
WSSA MODE-OF-ACTION GROUP NUMBER1: 14
GLYPHOSATE
1.63 lb a.e.
(Roundup WeatherMAX)
1.45 qt
4
NA
WSSA MODE-OF-ACTION GROUP NUMBER1: 9
OXYFLUORFEN
0.25–0.5 lb a.i.
(GoalTender)
0.5–1 pt
24
NA
WSSA MODE-OF-ACTION GROUP NUMBER1: 14
COMMENTS: Consider using low volatile organic compound (VOC) formulations of oxyfluorfen. Transplant celery at least 30 days after oxyfluorfen application.
PELARGONIC ACID
(Scythe)
Label rates
12
NA
WSSA MODE-OF-ACTION GROUP NUMBER1: UN
PROMETRYN
1–2 lb a.i.
(Caparol 4L)
2–4 pt
12
45
WSSA MODE-OF-ACTION GROUP NUMBER1: 5
S-METOLACHLOR
0.5–1 lb a.i.
(Dual Magnum)
0.5–1 pt
24
62
WSSA MODE-OF-ACTION GROUP NUMBER1: 15
COMMENTS: Apply as a preplant surface-applied or preplant incorporated application before transplanting. It can also be applied post-transplant as a directed spray or as a broadcast postemergence application. Rate applied depends on the texture of the soil with lower rates applied to coarse-textured soils and higher rates to finer-textured soils. Multiple applications are allowed but the season total cannot exceed 2 pt/acre.
TRIFLURALIN
0.5–1 lb a.i.
(Treflan HFP)
1–2 pt
12
NA
WSSA MODE-OF-ACTION GROUP NUMBER1: 3
COMMENTS: Preplant incorporate 2 to 3 inches deep.
AFTER PLANTING
CARFENTRAZONE-ETHYL
0.008–0.03 lb a.i.
(Shark EW)
0.5–2 fl oz
12
0
WSSA MODE-OF-ACTION GROUP NUMBER1: 14
COMMENTS: May be applied to the furrows between the rows using a hooded sprayer. A spray adjuvant such as nonionic surfactant, methylated seed oil, or crop oil concentrate is required.
CLETHODIM
0.068–0.121 lb a.i.
(Select Max)
9–16 fl oz
24
30
WSSA MODE-OF-ACTION GROUP NUMBER1: 1
COMMENTS: A non-ionic surfactant is recommended.
LINURON
0.75–1 lb a.i.
(Lorox DF)
1.5–2 lb
24
67
WSSA MODE-OF-ACTION GROUP NUMBER1: 5
COMMENTS: Rate is determined by the size of the weed and soil type. Use lower rates on younger weeds. May cause detectable plant injury if applied when temperatures exceed 85°F but celery usually outgrows the injury without a significant reduction in yield or quality
PROMETRYN
1–2 lb a.i.
(Caparol 4L)
2–4 pt
12
45
WSSA MODE-OF-ACTION GROUP NUMBER1: 5
COMMENTS: Do not use a surfactant.
SETHOXYDIM
0.1875–0.28 lb a.i.
(Poast)
1–1.5 pt
12
30
WSSA MODE-OF-ACTION GROUP NUMBER1: 1
COMMENTS: Use an approved oil concentrate at 2 pt/ acre.
‡
Restricted entry interval (REI) is the number of hours (unless otherwise noted) from treatment until the treated area can be safely entered without protective clothing. Preharvest interval (PHI) is the number of days from treatment to harvest. In some cases, the REI exceeds the PHI. The longer of the two intervals is the minimum time that must elapse before harvest.
NA
Not applicable.
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.
Text Updated: 05/24
Treatment Table Updated: 05/24