OHIO PESTICIDE APPLICATOR TRAINING. Unit 3 Formulations. The Ohio State University Extension. David J. Goerig Ag / Natural Resource Agent Mahoning County. What is a Formulation?. All the ingredients in a pesticide product. The Active Ingredients or Control Chemical.
David J. Goerig
Ag / Natural Resource Agent
The Active Ingredients or Control Chemical
The Inert ( Inactive) Ingredients.
Usually formulations are diluted in water, a petroleum-based solvent, or other diluents.
DISADVANTAGESEmulsifiable Concentrates(EC or E)
Easy to handle, transport, and store.
Easily absorbed through skin.
Little agitation required.
Solvents may cause surfaces to deteriorate.
Do not plug screens or nozzles.
May be corrosive
Little visible residue
When mixed, forms a solution that will not settle out or separate.
Formulations of these pesticides usually contain the active ingredient, the solvent, and one or more other ingredients.
Contain active ingredient and correct amount of solvent.
No further dilution is required.
Often 1% or less of active ingredient.
Mix readily, no agitation required.
Limited number of formulations.
Easy to handle and apply.
Require moderate agitation.
May leave a visible residue.
Form large droplets that do not drift easily.
Commonly used in vegetation control along rights of way.
No mixing, ready to use.
Easily drift off target
Requires simple equipment
Does not stick to surfaces.
Effective in hard-to –reach indoor areas.
May irritate yes,nose, throat and skin.
Good choice where moisture from a spray would cause damage.
Difficult to get even distribution of material
All the particles are the same shape and size.
DISADVANTAGESWettable Powders (WP or W)
Easy to store, handle, and transport.
Inhalation hazard to applicator while pouring and mixing the concentrated powder.
Less likely than EC’s and others to cause harm to treated target.
Requires constant agitation in spray tank.
Easily measured and mixed.
Abrasive to many pumps and nozzles./ clogs nozzles.
Less skin and eye absorption than EC’s and other liquids.
Residues may be visible.
Dissolve readily and form a true solution.
Few pesticides available in this form.
More easily measured and mixed.
Less inhalation hazard during pouring and mixing.
Examples include: Wetting Agents, Emulsifiers, Invert Emulsifiers, SpreadStickers, Penetrants, Foaming Agents, Thickeners, Safeners, Compatibility agents, Buffers, Anti-foaming agents.
APPLYING PESTICIDES CORRECTLY
The Ohio State University Extension