Herbicide label
Python Herbicide Label
Python (EPA 5481-677) is a Group 2 flumetsulam herbicide labeled for 4 crops. The label lists 34 controlled weeds, plus partial-control, suppression, and partner-control categories.
Python label facts
- Product Python
- EPA Reg. No. 5481-677
- Registrant Amvac Chemical Corporation
- Active ingredient flumetsulam
- MOA group 2
Crops on the Python label
Python is labeled for these 4 crops and uses, per the EPA label.
Weeds on the Python label
The Python label names 57 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 control34- beggarweed, florida
- carpetweed
- chickweed
- chickweed, common
- cocklebur, common
- goosefoot
- henbit
- horseweed
- jimsonweed
- ladysthumb
- lambsquarters, common
- mallow, venice
- mustard
- mustard, wild
- nightshade, black
- pennycress, field
- pigweed
- pigweed, redroot
- pigweed, smooth
- poinsettia, wild
- puncturevine
- purslane, common
- pusley, florida
- ragweed, common
- shepherd's-purse
- sicklepod
- sida, prickly
- smartweed, pennsylvania
- spurge, nodding
- spurge, spotted
- sunflower, annual
- thistle, russian
- velvetleaf
- waterhemp, common
Partial control
partial4- kochia
- morningglory
- ragweed, giant
- wormwood, biennial
Suppression
suppression1- grasses, annual
Controls with a tank-mix partner
needs partner19- dayflower
- dayflower, marsh
- dayflower, spreading
- marshelder
- morning glory, annual
- morningglory, entireleaf
- morningglory, ivyleaf
- morningglory, palmleaf
- morningglory, pitted
- morningglory, red
- morningglory, smallflower
- morningglory, tall
- ragweed, giant
- burcucumber
- copperleaf, hophornbeam
- nutsedge, yellow
- pigweed, spiny
- sesbania, hemp
- thistle, canada
Python 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.
Python FAQ
What weeds does Python control?
The Python label names 57 weeds, including florida beggarweed, carpetweed, chickweed, common chickweed, common cocklebur, and goosefoot. Control varies by crop, rate, and timing.
What crops is Python labeled for?
Python is labeled for 4 crops and uses, including field corn, soybeans, corn silage, and seed corn.
What is the active ingredient in Python? Is it a generic?
Python's active ingredient is flumetsulam (MOA Group 2). Other products list the same active ingredient; rates, formulations, and labeled crops differ — verify each on its own label.
Sources
Last updated 2026-09-30.