Herbicide label

Orion

Orion (EPA 100-1307) is a Group 2 and 4 florasulam and mcpa herbicide labeled for 6 crops. The label lists 30 controlled weeds, plus partial-control, suppression, and partner-control categories.

Build the herbicide program for your field

Tell FieldMarshal your crop, weeds, and rotation. Get back a complete program, products, rates, plant-back, and tank-mix, with every line checked against the label so you can verify it yourself.

Built from 1,700+ EPA herbicide labels and 49 state weed-control guides. Made for crop advisors and growers.

Build a program → or filter every label, free

Free to create your account. Every line references the label, so you can check it against the source.

Official EPA label (PDF)

“Orion Herbicide contains the active ingredients florasulam which inhibits acetolactate synthase (ALS, Site of Action Group 2) and MCPA which causes abnormal cell growth (synthetic auxin, Site of Action Group 4).”

— Orion EPA label, Reg. No. 100-1307

Orion label facts

Product Orion
EPA Reg. No. 100-1307
Registrant Syngenta Crop Protection, LLC
Active ingredient florasulam and mcpa
MOA group 2 and 4

Crops on the Orion label

Orion is labeled for these 6 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 Orion label

The Orion label names 37 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 control30

buckwheat, wild
volunteer canola
chamomile, corn
chamomile, false
mayweed, chamomile
chamomile, wild
chickweed, common
cleavers
fiddleneck
flixweed
hempnettle
knotweed
lambsquarters
rocket, london
mustard, black
mustard, blue
mustard, tansy
mustard, treacle
mustard, tumble
mustard, wild
pennycress, field
pigweed, redroot
pineapple-weed
prickly lettuce
ragweed, common
shepherd's-purse
smartweed, green
smartweed, ladysthumb
smartweed, pennsylvania
sunflower, annual

Suppression

suppression7

burdock
dandelion
filaree, redstem
plantain
sowthistle, annual
sowthistle, perennial
thistle, canada

Want the control level for your crop, or to filter 1,700+ labels by any of these weeds? Use the free label filter.

Orion 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.

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.

Orion FAQ

What weeds does Orion control?

The Orion label names 37 weeds, including wild buckwheat, volunteer canola, corn chamomile, false chamomile, chamomile mayweed, and wild chamomile. Control varies by crop, rate, and timing.

What crops is Orion labeled for?

Orion is labeled for 6 crops and uses, including wheat, barley, durum wheat, oats, and cereal rye.

What is the active ingredient in Orion? Is it a generic?

Orion's active ingredient is florasulam and mcpa (MOA Group 2 and 4). 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 Orion?

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 Orion?

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.