| Herbicide |
Amount/Acre |
R.E.I.+ |
P.H.I.+ |
| (commercial name) |
|
(hours) |
(days) |
|
| |
PREPLANT |
| A. |
GLYPHOSATE |
see label |
see label |
see label |
| |
(Roundup, etc.) |
see label |
|
| |
WSSA MODE OF ACTION GROUP NUMBER1: 9 |
| |
COMMENTS: Controls a wide variety of weeds, but is registered only for
use before planting, not within 30 days of planting. If may be used after
planting only as a spot treatment. Use 2% solutions of product and follow
label directions regarding the use of surfactants. Add about 17 lb/100 gal of
ammonium sulfate; mix with water before adding herbicide.
Difficult-to-control weeds, such as volunteer garlic and field bindweed, will
require two treatments. Improved field bindweed control has been noted when this material is applied early in the day. |
| |
| B. |
PARAQUAT* |
0.5–0.75 lb a.i. |
12 |
NA |
| |
(Gramoxone Inteon) 2 lb/gal |
2–3 pt |
|
| |
WSSA MODE OF ACTION GROUP NUMBER1: 22 |
| |
COMMENTS: Excellent on emerged winter annual
weeds such as cheatgrass and shepherd's-purse. May be used on both baby and
established mint but is poor on volunteer cereals, salsify, and filaree.
Combining paraquat at low rates (1/2 label maximum or 0.38 lb a.i.) with low
rates of oxyfluorfen (0.13–0.25 lb a.i.) enlarges the spectrum of weeds
controlled and enhances weed control. Do not apply this combination to
emerged mint because of the injury potential. Always use a surfactant (0.25%
or 2 pt/100 gallons) and apply late in the evening for best results. Weeds that germinate after application will not be controlled. |
| |
| |
POSTPLANT |
| A. |
BENTAZON |
1–2 lb a.i. |
48 |
NA |
| |
(Basagran) 4EC |
2–4 pt |
|
| |
WSSA MODE OF ACTION GROUP NUMBER1: 6 |
| |
COMMENTS: Controls only broadleaf weeds and
is the safest in baby mint. Always use high end of label; relatively
expensive because of the higher rates required for effective control. Weak on
mayweed chamomile. May be tank mixed with sethoxydim for control of both
grass and broadleaf weeds. Use higher rates for larger weeds and weeds such
as mayweed chamomile. May be used in newly established mint. Use a crop oil
concentrate at the rate of 1 qt/acre with this product. Considered to be a
ground water contaminant and requires a use permit within Ground Water Protection Areas. Works best with warmer temperatures. |
| |
| B. |
SETHOXYDIM |
0.19–0.47 lb a.i. |
12 |
20 |
| |
(Poast) |
1–2.5 pt |
|
| |
WSSA MODE OF ACTION GROUP NUMBER1: 1 |
| |
COMMENTS: Only controls grassy weeds. Use
high end of label. Applied to emerged grassy weeds where it is absorbed by
the leaves. It will not control broadleaf weeds, bluegrass, or fine fescue.
It may be used in either baby and/or established mint. The most common use of
sethoxydim is to control grasses missed by residual herbicides. If residual
herbicides are applied early in fall, their effectiveness is usually gone by
late spring, and sethoxydim may be used to control summer grasses such as barnyardgrass (watergrass). |
| |
| C. |
CLETHODIM |
0.07–0.24 lb a.i. |
24 |
21 |
| |
(Select Max) |
9–32 oz |
|
| |
WSSA MODE OF ACTION GROUP
NUMBER1: 1
|
| |
COMMENTS: Can be used in baby mint and also
in established mint for control of grasses. Applied to emerged grassy weeds
where it is absorbed by the leaves. It does not have soil activity. Controls
both annual and perennial grass weeds, including annual bluegrass. Use the
high rate for heavy grass pressure, annual bluegrass, or when grass height
exceeds the label recommendation. A crop oil concentrate must be added with
this herbicide. Add about 17 lb/100 gal of ammonium sulfate; mix with water before adding crop oil concentrate and then herbicide. |
| |
| D. |
OXYFLUORFEN |
0.13–1.75 lb a.i. |
24 |
NA |
| |
(Goal, GoalTender) |
Label rates |
|
| |
WSSA MODE OF ACTION GROUP NUMBER1: 14 |
| |
COMMENTS: May only be used on dormant mint.
Use higher rates (to 0.5 lb a.i.) on established mint. Apply only one
application per season. Particularly effective for cheeseweed and filaree (Erodium spp.). Apply to weeds that are
4 inches or less in size. May be tank mixed with paraquat for improved contact weed control. |
| |
| E. |
FLUMIOXAZIN |
2 oz a.i. |
12 |
80 |
| |
(Chateau SW) |
4 oz |
|
| |
WSSA MODE OF ACTION GROUP NUMBER1: 14 |
| |
COMMENTS: Provides burndown of emerged weeds
as well as residual control. Effective against small winter annuals. Must be
applied to dormant mint otherwise unacceptable injury may occur. May be
applied anytime to dormant mint, but not after March 1. Apply in a minimum of
15 gallons per acre. May be tank mixed with paraquat for additional burndown
activity. Add about 17 lb/100 gal of ammonium sulfate; mix with water before
adding surfactant at 0.25% (2 pt/100 gal) and then herbicide. Use allowed under a supplemental label. |
| |
| F. |
BROMOXYNIL |
0.25–0.5 lb a.i. |
24 |
70 |
| |
(Buctril) 2EC |
1–2 pt |
|
| |
WSSA MODE OF ACTION GROUP NUMBER1: 6 |
| |
COMMENTS: Labeled for established mint only.
Do not use in spring-planted mint. Apply to dormant mint. Often cause injury
to mint, particularly when temperatures are 70°F (or higher) on the day of
application or within 5 days of application. Do not add surfactants because
increased injury will result. Most effective with least crop damage when
applied through automated sprinkler systems. Yields are typically not
affected by injury caused at low application rates. Good for control of
pigweed, lambsquarters, or sunflowers at young growth stages (less than 6
inches) and when ground application of other herbicides is not possible
because of wet soils or dense growth of mint. Do not apply more than 6 pt/acre/season. |
| |
| G. |
DIURON |
1.6–2.4 lb a.i. |
12 |
NA |
| |
(Drexel Diuron) 4L |
1.6–2.4 qt |
|
| |
WSSA MODE OF ACTION GROUP NUMBER1: 7 |
| |
COMMENTS: Labeled for established mint only,
at least 1 year old. Apply only when mint is dormant. Use the low rate on
sandy soils and the high rate on other soils. May be mixed with paraquat and
oxyfluorfen. Do not plant susceptible crops within one year if applied rates
exceed 1.5 lb a.i./acre. For use only in Del Norte, Humboldt, Lassen, Modoc,
Shasta and Siskiyou counties in California under special permission from
California Department of Pesticide Regulation. Considered to be a ground
water contaminant and requires a use permit within Ground Water Protection
Areas. Not all diuron formulations marketed in California have mint on the label. |
| |
| H. |
CLOPYRALID |
0.12–0.375 lb a.i. |
12 |
45 |
| |
(Stinger) 3EC |
0.33–1 pt |
|
| |
WSSA MODE OF ACTION GROUP NUMBER1: 4 |
| |
COMMENTS: Apply low rates when weeds are
small because injury to mint can occur at high rates. Controls composite
weeds such as salsify and legumes such as clover. Do not rotate to
susceptible crops (strawberry, alfalfa, onions, potatoes, etc.) within 12
months of application. Do not apply more than one pint/acre/season. Do not
add surfactant because it may reduce selectivity to mint and result in crop
injury. Do not feed mint slugs to livestock or use mint slugs for compost in susceptible crops such as legumes. |
| |
| I. |
PARAQUAT* |
0.33–0.5 lb a.i. |
12 |
NA |
| |
(Gramoxone Inteon) |
1.3–2 pt |
|
| |
WSSA MODE OF ACTION GROUP NUMBER1: 22 |
| |
COMMENTS: Apply when crop is dormant and when
weeds are less than 6 inches tall. Do not apply more than 0.75 lb
a.i./acre/season. More effective weed control can be achieved by mixing with
oxyfluorfen at low rates (0.13-0.26 lb a.i. of oxyfluorfen and 0.38 lb a.i. of paraquat). Always add a surfactant. |
| |
| J. |
PENDIMETHALIN |
0.7–1.9 lb a.i. |
24 |
90 |
| |
(Prowl H20) |
1.5–4 pt |
|
| |
WSSA MODE OF ACTION GROUP NUMBER1: 3 |
| |
COMMENTS: Do not apply to first year
mint. Do not exceed 4.0
pints/acre/season. Do not apply
using an irrigation system. Do
not feed treated mint hay to livestock or allow grazing of treated mint hay. |
| |
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