Herbicide label
Explorer Herbicide Label
Explorer (EPA 100-1131) is a Group 27 mesotrione herbicide labeled for 10 crops. The label lists 72 controlled weeds, plus partial-control, suppression, and partner-control categories.
“Explorer Herbicide is a systemic preemergence and postemergence herbicide for the selective contact and residual control of broadleaf weeds in fi eld corn, seed corn, yellow popcorn, sweet corn, and other listed crops.”
Explorer label facts
- Product Explorer
- EPA Reg. No. 100-1131
- Registrant Syngenta Crop Protection, LLC
- Active ingredient mesotrione
- MOA group 27
Crops on the Explorer label
Explorer is labeled for these 10 crops and uses, per the EPA label.
Weeds on the Explorer label
The Explorer label names 82 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 control72- amaranth, palmer
- amaranth, powell
- amaranth, spiny
- atriplex
- buffalobur
- burclover, california
- burcucumber
- carpetweed
- carrot, wild
- chickweed, common
- chickweed, mouseear
- cocklebur, common
- dandelion, common (seedling)
- deadnettle, purple
- dock, curly
- eveningprimrose, cutleaf
- fiddleneck
- filaree, redstem
- filaree, whitestem
- fleabane, hairy
- galinsoga
- carolina geranium
- groundcherry, smooth
- groundsel, common
- hemp
- henbit
- horsenettle
- horseweed
- jimsonweed
- kochia
- lambsquarters, common
- prickly lettuce
- mallow, common
- mallow, venice
- mannagrass
- mayweed, chamomile
- morningglory, entireleaf
- morningglory, ivyleaf
- morningglory, pitted
- mustard, wild
- nettle, burning
- nightshade, black
- nightshade, eastern black
- nightshade, hairy
- pansy
- pigweed, redroot
- pigweed, smooth
- pigweed, tumble
- pineapple-weed
- potatoes, volunteer
- puncturevine, common
- purslane, common
- pusley, florida
- ragweed, common
- ragweed, giant
- redmaids
- rocket, london
- sesbania, hemp
- shepherd's-purse
- sida, prickly
- smartweed, ladysthumb
- smartweed, pale
- smartweed, pennsylvania
- sowthistle, annual
- needles, spanish
- sunflower, annual
- swinecress
- tasselflower, red
- velvetleaf
- vetch
- waterhemp, common
- willowherb, panicle
Partial control
partial10- signalgrass, broadleaf
- buckwheat, wild
- crabgrass, large
- dandelion
- knotweed, prostrate
- nutsedge, yellow
- pokeweed, common
- pusley, common
- thistle, canada
- vetch, purple
Explorer 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.
Explorer FAQ
What weeds does Explorer control?
The Explorer label names 82 weeds, including palmer amaranth, powell amaranth, spiny amaranth, atriplex, buffalobur, and california burclover. Control varies by crop, rate, and timing.
What crops is Explorer labeled for?
Explorer is labeled for 10 crops and uses, including field corn, sorghum, seed corn, popcorn, and sweet corn.
What is the active ingredient in Explorer? Is it a generic?
Explorer's active ingredient is mesotrione (MOA Group 27). 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.