The use of oil base The use of oil based d adjuva adjuvants nts - - PowerPoint PPT Presentation

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Jul 11, 2023 200 likes •359 views

The use of oil base The use of oil based d adjuva adjuvants nts to to improve improv e pesticide pesticide uptak uptake Peter Jones Victorian Chemical Company Melbourne, Australia What are adjuvants How do they work Oil based

SLIDE 1

80 YEARS

The use of oil The use of oil base based d adjuva adjuvants nts to to improv improve e pesticide pesticide uptak uptake

What are adjuvants How do they work Oil based adjuvants for foliar penetration

Peter Jones Victorian Chemical Company Melbourne, Australia

SLIDE 2

80 YEARS

What are spray adjuvants?

“A material added to a tank mix to aid or modify the action of an agrichemical, or the physical characteristics of the mixture.”

ASTM International Standard Terminology

What do adjuvants do?

help protect against degradation or losses
help deliver a pesticide to its target
help penetrate into the target

SLIDE 3

80 YEARS

What are spray adjuvants?

Chemical Types

Surfactants

Increase droplet adhesion onto target
Spread spray droplets to effectively cover the target

Oils

Aid penetration through waxy cuticle
Slow evaporation of spray droplets and deposits

Others

Buffers to control pH
Water conditioners to complex with water hardness ions

SLIDE 4

80 YEARS

How do adjuvants work

Adhesion Spreading Penetration

SLIDE 5

80 YEARS

How do adjuvants work - penetration

Aqueous pathway - Penetration

f aqueous substances via

aqueous pores Lipophilic pathway – lipophilic diffusion through the cuticle

Assisted by surfactant adjuvants Assisted by oil-based adjuvants

SLIDE 6

80 YEARS

Oil Type Synonyms Adjuvant Products Properties

Penetration Crop Safety Droplet Size

Mineral Oils Petroleum Oil Paraffin Oil White oil Bonza* Uptake* Fair Good No effect Vegetable Oils Canola Oil Seed oil Natural Oils Synetrol* Poor Good Increases Esterified Oils Methyl Oleate Methylated or Ethylated Seed Oil MSO / ESO Fatty Esters Vegetable esters Hasten Good Generally OK Increases

Oil types as Adjuvants

SLIDE 7

80 YEARS

Clethodim Penetration

10 20 30 40 50 60 4h 12h 24h % of A.I. Applied Time After Application No Adjuvant Uptake - Mineral Oil Hasten - Esterified Vegetable Oil

SLIDE 8

80 YEARS

Tebuconazole Penetration

10 20 30 40 50 60 4h 12h 24h % of A.I. Applied Time After Application No Adjuvant Uptake - Mineral Oil Hasten - Esterified Vegetable Oil

SLIDE 9

80 YEARS

Saflufenacil Penetration

5 10 15 20 25 30 35 40 4h 12h 24h % of A.I. Applied Time After Application No Adjuvant Bonza - Mineral Oil Hasten - Esterified Vegetable Oil

SLIDE 10

80 YEARS

Clethodim field trial

10 20 30 40 50 60 70 80 90 100 18DAT 27DAT 71DAT 18DAT 27DAT 71DAT 210g/ha - Clethodim 300g/ha - Clethodim No Adjuvant Uptake 0.5% Hasten 0.5%

SLIDE 11

80 YEARS

Glyphosate Rainfastness

10 20 30 40 50 60 70 80 90 100 0.5h 1h 2h 4h No Rain Percent Control (%) Time Before Rain

No Adjuvant Deluge - Wetting Agent LI-700 - Surfactant Hasten - Esterified Vegetable Oil

SLIDE 12

80 YEARS

Glyphosate Rainfastness

10 20 30 40 50 60 70 80 90 100 0.5h 1h 2h 4h No Rain Percent Control (%) Time Before Rain

No Adjuvant Deluge - Wetting Agent LI-700 - Surfactant Hasten - Esterified Vegetable Oil

SLIDE 13

80 YEARS

Glyphosate Rainfastness

10 20 30 40 50 60 70 80 90 100 0.5h 1h 2h 4h No Rain Percent Control (%) Time Before Rain

No Adjuvant Deluge - Wetting Agent LI-700 - Surfactant Hasten - Esterified Vegetable Oil

SLIDE 14

80 YEARS

Glyphosate Rainfastness

10 20 30 40 50 60 70 80 90 100 0.5h 1h 2h 4h No Rain Percent Control (%) Time Before Rain No Adjuvant Deluge - Wetting Agent LI-700 - Surfactant Hasten - Esterified Vegetable Oil

SLIDE 15

80 YEARS

Conclusions

Spray adjuvants are useful for enhancing efficacy of pesticides Oil based adjuvants can greatly enhance foliar penetration of lipophilic active ingredients Esterified Vegetable Oils are generally the most effective

il based adjuvants for foliar penetration