Agricultural Spray Adjuvant Technology -Sorting Out the Adjuvant Puzzle- What is an Adjuvant? Importance of Adjuvants Adjuvants Are Classified Into Four Categories adjuvant image company which provide adjuvant Which adjuvant do I use with which herbicide? The Influence of Adjuvants on Herbicide Performance

1. Agricultural Spray Adjuvant Technology
-Sorting Out the Adjuvant Puzzle-
Activator
Adjuvants
Spray
Modifier
Adjuvants
Utility
Modifier
Adjuvants
Utility
Products
?

2. What is an Adjuvant?
• An adjuvant is any additive used in
conjunction with a pesticide to increase
biological activity and/or to modify various
physical properties of a spray solution.

3. Importance of Adjuvants
• Pesticide Stability
• Solubility
• Compatibility
• Foaming
• Suspension
• Surface Tension
• Droplet Size
• Drift
• Volatilization
• Coverage
• Adherence
• Penetration
 Adjuvants play a key role in controlling these variables
Spray applications are affected by many physical variables

4. Adjuvants Are Classified Into Four
Categories
• Activator Adjuvants
– Enhance Pesticide Performance
• Surfactants, Crop Oil Concentrates, Methylated Seed Oils, Fertilizer
Solutions, Penetrants
• Spray Modifier Adjuvants
– Affects Physical Properties Of Spray Solutions
• Stickers, Deposition Aids, Drift Retardants, Evaporation Aids
• Utility Modifier Adjuvants
– Minimize Handling and Application Problems
• Compatibility Agents, Buffering Agents, Defoamers, Anti-foams
• Utility Products
– Minimize Application Problems
• Foam Markers, Tank Cleaners

8. Question: Which adjuvant do I use with
which herbicide?
Answer:.“The adjuvant must be matched
with the herbicide, the crop species, the
weed species and the prevailing
environment.”

9. Adjuvants Types
• Surfactants (also called spreaders or wetting agents)
– An adjuvant that reduces surface surface tension between
the spray solution droplets and the pest target’s surface,
thus providing greater coverage.
• Crop Oil Concentrates
– A combination of oil (petroleum or vegetable) and
surfactants/emulsifiers. Crop oil concentrates act as
penetrants, stickers, spreaders (limited), humectants, etc.
• Methylated or Ethylated Seed Oils
– An emulsified methylated or ethylated seed oil. Act as
penetrants, spreaders (limited), humectants, etc.

10. Surfactants
Without Surfactant With Surfactant