Delivery of biological performance via micro-encapsulation formulation chemistry

Area of Science:

• Agricultural Chemistry
• Materials Science
• Toxicology

Background:

• Lambda-cyhalothrin is a widely used insecticide.
• Existing formulations (emulsifiable concentrates, wettable powders, water-dispersible granules) have toxicological concerns.
• There is a need for safer pesticide delivery systems.

Purpose of the Study:

• To develop novel micro-capsules of lambda-cyhalothrin using an in situ procedure.
• To create both slow- and fast-release formulations.
• To evaluate the biological performance and toxicological profile of the new formulations.

Main Methods:

• Preparation of lambda-cyhalothrin micro-capsules via a novel in situ method.
• Chemical manipulation to control release rates (slow vs. fast).
• Comparative analysis of biological performance and toxicological profiles against commercial formulations.

Main Results:

• Successfully prepared lambda-cyhalothrin micro-capsules with tunable release rates.
• Fast-release micro-capsules demonstrated biological performance comparable to commercial emulsifiable concentrates.
• The micro-encapsulated formulations exhibited a significantly improved toxicological profile compared to EC, WP, and WG formulations.

Conclusions:

• Micro-encapsulation is a viable technology for the safer application of lambda-cyhalothrin.
• The developed formulations offer enhanced safety without compromising efficacy.
• This technology addresses key factors driving the adoption of safer pesticide use practices.