Herbicide label

RT Master II

RT Master II (EPA 524-539) is a Group 9 glyphosate herbicide labeled for 23 crops. The label lists 87 controlled weeds, plus partial-control, suppression, and partner-control categories.

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Official EPA label (PDF)

RT Master II label facts

Product RT Master II
EPA Reg. No. 524-539
Registrant Bayer CropScience
Active ingredient glyphosate
MOA group 9

Crops on the RT Master II label

RT Master II is labeled for these 23 crops and uses, per the EPA label.

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Weeds on the RT Master II label

The RT Master II label names 101 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 control87

alfalfa
barley
barnyardgrass, common
bindweed, field
bittercress
bluegrass, annual
bluegrass, bulbous
blueweed, texas
brome, downy
brome, japanese
bromegrass, smooth
buckwheat, wild
buttercup
cheat
chickweed
cocklebur, common
coreopsis, plains
corn, volunteer
crabgrass
dock, curly
dwarfdandelion
filaree, broadleaf
fleabane, hairy
foxtail
foxtail, bristly
foxtail, giant
foxtail, green
foxtail, yellow
carolina geranium
goatgrass, jointed
grain sorghum
groundcherry
groundsel, common
henbit
horseweed
johnsongrass
johnsongrass, seedling
kochia
lambsquarters
millet, wild-proso
morning glory, annual
mullein, common
mustard, blue
mustard, tansy
mustard, tumble
mustard, wild
nightshade, black
nightshade, hairy
nightshade, silverleaf
oats
wild oats
panicum, fall
panicum, texas
pennycress, field
pigweed
pigweed, redroot
prickly lettuce
pusley, florida
quackgrass
rocket, london
cereal rye
rye, common
rye, volunteer
ryegrass
ryegrass, perennial
sandbur, field
sandbur, longspine
sesbania, hemp
shattercane
shepherd's-purse
sicklepod
sowthistle, annual
sprangletop
spurge, prostrate
spurge, spotted
starbur, bristly
stinkgrass
sunflower
swinecress
thistle, canada
thistle, russian
velvetleaf
wheat
wheat, overwintered
volunteer wheat
wheatgrass, western
witchgrass

Partial control

partial1

bromegrass, smooth

Suppression

suppression16

beggarweed, florida
bermudagrass
bindweed, field
dogbane, hemp
dogfennel
guineagrass
johnsongrass
milkweed
nightshade, silverleaf
ragweed, giant
smutgrass
sunflower
thistle, canada
thistle, musk
vaseygrass
velvetleaf

Controls with a tank-mix partner

needs partner5

ragweed, common
ragweed, giant
signalgrass, broadleaf
smartweed, pennsylvania
spurge, leafy

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RT Master II 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, the rotational crop, and your state, region, and rainfall — some intervals differ in CO, ID, KS, MN, MT, ND, NE, NM, NV, OK, OR, SD, TX, UT, WA, and WY.

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.

RT Master II FAQ

What weeds does RT Master II control?

The RT Master II label names 101 weeds, including alfalfa, barley, common barnyardgrass, field bindweed, bittercress, and annual bluegrass. Control varies by crop, rate, and timing.

What crops is RT Master II labeled for?

RT Master II is labeled for 23 crops and uses, including field corn, soybeans, wheat, cotton, and sunflower.

What is the active ingredient in RT Master II? Is it a generic?

RT Master II's active ingredient is glyphosate (MOA Group 9). 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 RT Master II?

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.

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Can I tank-mix RT Master II?

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.