Herbicide label
Harbinger
Harbinger (EPA 241-337-34704) is a Group 3 pendimethalin herbicide labeled for 1 crops. The label lists 16 controlled weeds, plus partial-control, suppression, and partner-control categories.
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“This product is a selective herbicide for controlling most annual grasses and certain broadleaf weeds as they germinate.”
Harbinger label facts
- Product Harbinger
- EPA Reg. No. 241-337-34704
- Distributor Loveland Products, Inc.
- Active ingredient pendimethalin
- MOA group 3
Crops on the Harbinger label
Harbinger is labeled for these 1 crops and uses, per the EPA label.
Need the rate or timing for one of these? Filter every label by your crop, free.
Weeds on the Harbinger label
The Harbinger label names 26 weeds and rates each by how the product handles it: full control, partial control, suppression, or control with a tank-mix partner. A weed can fall at more than one level, because control varies by crop, rate, and timing.
Controls
full control16- bugloss, small
- carpetweed
- henbit
- kochia
- lady's thumb
- lambsquarters, common
- lambsquarters, slimleaf
- mustard, black
- pigweed
- purslane
- pusley, florida
- sprangletop
- spurge, annual
- waterhemp, common
- witchgrass
- junglerice
Suppression
suppression10- amaranth, palmer
- chickweed, common
- cupgrass, woolly
- millet, wild-proso
- rocket, london
- shattercane
- shepherd's-purse
- signalgrass
- smartweed, pennsylvania
- velvetleaf
Want the control level for your crop, or to filter 1,700+ labels by any of these weeds? Use the free label filter.
Harbinger rates and plant-back
The label answers both with a table, not a single number. Here is what drives each answer.
Application rate
Your rate depends on your crop and your soil texture.
Get the rate for your field: build a program and FieldMarshal gives you the exact per-acre rate for your crop from the label line.
Plant-back and rotation
Your interval depends on your application rate and the rotational crop.
Get the interval for your rotation: build a program and FieldMarshal gives you the exact plant-back for your rotational crop from the label line.
Harbinger FAQ
What weeds does Harbinger control?
The Harbinger label names 26 weeds, including small bugloss, carpetweed, henbit, kochia, lady's thumb, and common lambsquarters. Control varies by crop, rate, and timing.
What crops is Harbinger labeled for?
Harbinger is labeled for 1 crops and uses, including rice.
What is the active ingredient in Harbinger? Is it a generic?
Harbinger's active ingredient is pendimethalin (MOA Group 3). Other products list the same active ingredient; rates, formulations, and labeled crops differ — verify each on its own label.
What's the plant-back interval after Harbinger?
It depends on your rotational crop, application rate, and region, so the label gives a table, not one number. Build a program and FieldMarshal gives you the exact interval for your rotation from the label line, so you can verify it.
Build a program →Can I tank-mix Harbinger?
It depends on your target weeds, crop stage, and which partners the label approves. Build a program and FieldMarshal checks the label for approved partners and gives the condition on each, so you can verify it.
Build a program →Plan in minutes, not hours.
Start with Harbinger and let FieldMarshal build a defensible herbicide program for your field, every product, rate, and plant-back cross-referenced and checked against the label.
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Sources
Last updated 2026-07-14.