MST 4 SC Herbicide (PRD 35442), Bayer CropScience Inc. · Paradigm Inputs

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MST 4 SC Herbicide

PCP #35442 · Bayer CropScience Inc. · Herbicide

Group 27

Group 27 herbicide containing mesotrione at 480 g/L for pre-emergent and post-emergent control of broadleaf weeds in soybeans, field corn, sweet corn, seed corn, cranberries, asparagus, blueberries, sod production, sorghum, and rhubarb. Provides control of redroot pigweed, velvetleaf, lamb's-quarters, wild mustard, eastern black nightshade, and suppression of common ragweed.

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Registered uses (44)

Crop × pest × application rate combinations from the official label. Rates converted to per-acre. PHI is the pre-harvest interval; REI is the restricted-entry interval. Always confirm against the official label PDF before applying.

Crop	Target	Rate	PHI	REI
Asparagus	Lamb's-quarters, redroot pigweed, velvetleaf, wild mustard, common ragweed (suppression only)	0.121 L/acre	–	12 d
Asparagus	Lamb's-quarters, redroot pigweed, velvetleaf, wild mustard, common ragweed (suppression only)	0.121 L/acre	–	12 d
Blueberry	Eastern black nightshade, velvetleaf, redroot pigweed, common ragweed (suppression)	0.121 L/acre	–	12 d
Blueberry	Eastern black nightshade, velvetleaf, redroot pigweed, common ragweed (suppression)	0.121 L/acre	60 d	12 d
Blueberry	Eastern black nightshade, velvetleaf, redroot pigweed, common ragweed (suppression)	0.121 L/acre	–	12 d
Blueberry	Eastern black nightshade, velvetleaf, redroot pigweed, common ragweed (suppression)	0.121 L/acre	60 d	12 d
Blueberry	Lamb's-quarters, redroot pigweed, velvetleaf, wild mustard, common ragweed (suppression)	0.121 L/acre	60 d	12 d
Blueberry	Lamb's-quarters, redroot pigweed, velvetleaf, wild mustard, common ragweed (suppression)	0.121 L/acre	–	12 d
Blueberry	Lamb's-quarters, redroot pigweed, velvetleaf, wild mustard, common ragweed (suppression)	0.121 L/acre	–	12 d
Blueberry	Lamb's-quarters, redroot pigweed, velvetleaf, wild mustard, common ragweed (suppression)

Adjuvant and tank-mix guidance

Adjuvant requirements, compatibility notes, and mixing restrictions from the official label. Always confirm against the official label PDF before mixing.

Guidance	Adjuvant	Rate
Required	non-ionic surfactant Always add a spray surfactant. Use a non-ionic surfactant (e.g., AGRAL® 90 Non-ionic Liquid Wetting & Spreading Agent) at 0.20% v/v.	0.20% v/v
Required	non-ionic surfactant Post-emergent applications of MST 4 SC Herbicide must be applied with a non-ionic surfactant (e.g., AGRAL 90 Non-ionic Liquid Wetting & Spreading Agent) at 0.2% v/v (2.0 L for each 1000 L of spray mixture).	0.2% v/v (2.0 L for each 1000 L of spray mixture)
Required	non-ionic surfactant 0.58 L AATREX Liquid 480 Herbicide + a non-ionic surfactant (e.g., Agral 90 Non-ionic Liquid Wetting & Spreading Agent) at 0.2% v/v	0.2% v/v
Required	non-ionic surfactant a non-ionic surfactant (e.g., AGRAL 90 Non-ionic Liquid Wetting & Spreading Agent) at 0.2% v/v	0.2% v/v
Required	non-ionic surfactant Add a non-ionic surfactant (e.g., AGRAL 90 Non-ionic Liquid Wetting & Spreading Agent) at 0.2% v/v.	0.2% v/v
Recommended	non-ionic surfactant If weeds are beyond the 2-leaf stage, then add a spray surfactant. Use a non-ionic surfactant (e.g., AGRAL 90 Non-ionic Liquid Wetting & Spreading Agent) at 0.20% v/v.	0.20% v/v
Recommended	non-ionic surfactant If weeds are emerged at the time of MST 4 SC Herbicide application, the addition of a non-ionic surfactant (e.g., AGRAL 90 Non-ionic Liquid Wetting & Spreading Agent) at the rate of 0.2% v/v is recommended. If weeds have not emerged, no adjuvant is recommended.	0.2% v/v