Table 9.5. Herbicides approved for managing weeds in lettuce. (continued)
Labels change frequently. Be sure to read a current product label before applying any chemical.
Active ingredient Trade name MOA
lb. a.i./A product/A code Crops Weeds controlled / remarks
*** POSTEMERGENCE ***
Carfentrazone (Aim) 1.9 EW 14 Leafy vegetables Emerged broadleaf weeds. Apply as a preplant burn down for emerged
broadleaf weeds. Use crop oil concentrate or nonionic surfactant at
recommended rates. May be tank mixed with other herbicides.
up to 0.031
(Aim) 2.0 EC
Clethodim (Select, Arrow) 2 EC 1 Leafy vegetables Emerged annual and perennial grass weeds. For repeat application,
0.09 - 0.13 minimum of 14 days between applications. PHI 14 days
(Select Max) 1 EC
0.07 - 0.13
Imazethapyr (Pursuit) 2 EC 2 Lettuce, endive, escarole
Apply postemergence after 3 - 4 true leaf stage. Do not apply more than
2 applications per crop. A maximum of 4 oz. per crop season. Potential
for rotational crop damage is highly variable. Label is a Third-Party
Registration (TPR, Inc.). Use without having a signed authorization and
waiver for liability agreement is a misuse of the product. PHI 30 days.
0.016 - 0.031
Paraquat
0.3 - 0.5
(Gramoxone) 2 SL
1.2 - 1.9 pt.
22 Lettuce Emerged broadleaf and grass weeds. Row middles only. Consult individual
labels for not all formulations are labeled for this use pattern. Include a NIS
at 0.25% v/v. PHI 24 hrs.
Pelargonic acid (Scythe) 4.2 EC 27 Leafy vegetables Emerged broadleaf and grass weeds. Apply as a directed or shielded
3 - 10% v/v spray to row middles.
Sethoxydim (Poast) 1.5 EC 1 Head/leaf lettuce, endive,
radicchio
Emerged grass weeds. Do not exceed 3.0 pt./A. per season. Include a
crop oil concentrate. Head lettuce and radicchio PHI 30 days. Leaf lettuce
and endive PHI 15 day.
0.19 - 0.28 1.0 - 1.5 pt.
Table 9.6. Herbicides approved for managing weeds in spinach.
Labels change frequently. Be sure to read a current product label before applying any chemical.
Active ingredient Trade name MOA
lb. a.i./A product/A code Weeds controlled / remarks
*** PREPLANT / PREEMERGENCE ***
Carfentrazone (Aim) 1.9 EW 14 Apply as a preplant burn down for emerged broadleaf weeds. Use crop oil concentrate, methylated seed oil,
or nonionic surfactant at recommended rates. Maximum rate of 0.096 lb. a.i./A per season. No pretransplant
interval.
up to 0.031
(Aim) 2.0 EC
Glyphosate (various formulations) 9 Emerged broadleaf and grass weeds. Apply as a preplant burn down treatment. Product is a contact, nonseconsult
labels lective, foliar-applied herbicide with no residual control. May be tank mixed with soil residual compounds.
Pelargonic acid (Scythe) 4.2 EC 27 Emerged broadleaf and grass weeds. Apply as a preplant burn down treatment. Product is a contact, nonse3
- 10% v/v lective, foliar-applied herbicide with no residual control. May be tank mixed with soil residual compounds.
(ET Herbicide) 0.208 EC 14 Emerged broadleaf weeds. Apply as a preplant burndown treatment.
0.001 - 0.003
*** POSTEMERGENCE ***
Carfentrazone (Aim) 1.9 EW 14 Emerged broadleaf weeds. Apply as hooded application to row middles only. Use crop oil concentrate or
up to 0.031 nonionic surfactant at recommended rates. May be tank mixed with other herbicides. PHI 0 days.
(Aim) 2.0 EC
Clopyralid (Clopyr Ag) 3 EC 4 Certain broadleaf weeds. Do not exceed a total of 0.5 pt./A per growing season. Apply in the 2- to 5-leaf stage
0.06 - 0.12 0.17 - 0.33 pt. of crop growth. PHI 21 days.
Clethodim (Arrow, Select) 2 EC 1 Perennial and annual grass weeds. Use higher rates under heavy grass pressure or larger grass weeds.
0.09 - 0.13 Read the label for required surfactant. PHI 14 days.
(Select Max) 1 EC
0.07 - 0.25
Pelargonic acid (Scythe) 4.2 EC 27 Emerged broadleaf and grass weeds. Direct spray to row middles. Product is a contact, nonselective, foliar3
- 10% v/v applied herbicide with no residual control. May be tank mixed with several soil residual compounds.
Sethoxydim (Poast) 1.5 EC 1 Controls emerged grass weeds. A total of 3.0 pt./A. applied in one season. Include a crop oil concentrate.
0.19 - 0.28 1.0 - 1.5 pt. Unsatisfactory results may occur if applied to grasses under stress. PHI 15 days.
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