Spray-Dried Pest Control Compositions for Rain-Exposure Stability
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Solution Overview
Problem
Existing pest control compositions face challenges in reducing storage space, handling, and shipping requirements while maintaining effective pest control, particularly in formulations exposed to rain, as they often suffer from reduced residual protein concentrations and activity of Bacillus thuringiensis.
Innovation Solution
A spray-dried composition comprising a polymer with specific molecular weight and monomeric structural units, combined with Bacillus thuringiensis, is developed, which can be mixed with water to form an aqueous pest control composition, providing improved residual protein concentrations and activity retention after rain exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pest control formulations are used, then storage and handling requirements are high, but residual protein concentration and Bacillus thuringiensis activity are reduced after rain exposure
Solution Approach 1:
The patent applies parameter changes by transforming the formulation from liquid to spray-dried powder form, changing the physical state and concentration parameters. This allows the composition to be stored in compact dry form and then reconstituted to achieve optimal residual protein concentration and Bacillus thuringiensis activity after rain exposure
Solution Approach 2:
The patent uses composite materials by combining Bacillus thuringiensis with specific polymers (acrylic, polyacrylamide, or polyvinyl alcohol) in a spray-dried formulation. This composite structure protects the biological agent while enabling improved stability and activity retention under rain exposure conditions
2Reliability
If conventional pest control formulations are used, then handling requirements are high, but Bacillus thuringiensis activity is reduced after rain exposure
Solution Approach 1:
The formulation undergoes parameter changes from liquid to spray-dried powder, which simplifies handling during storage and transport. When applied, it reconstitutes to provide enhanced Bacillus thuringiensis activity that is more resistant to rain washoff, effectively trading initial handling complexity for improved field performance
3Reliability
If polymer with specific molecular weight and monomeric structural units is used, then residual protein concentration is improved, but formulation complexity increases
Solution Approach 1:
The patent applies local quality by specifying particular polymer properties (molecular weight 10,000-100,000 daltons, specific monomeric structural units) that create localized protective effects around the Bacillus thuringiensis spores. This targeted polymer selection enhances residual protein concentration without requiring complex multi-component formulations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The spray-dried composition offers reduced storage and handling needs, and enhances Bacillus thuringiensis activity and protein retention in aqueous formulations, outperforming conventional methods in rain exposure scenarios.
Implementation Method 1
spray-dried pest control compositions include a polymer and Bacillus thuringiensis
Implementation Method 2
the polymer contains from 20 wt % to 100 wt % of monomeric structural units derived from a monomer with log P of from 2.0 to 6.0
Data Source
AI summary
A spray-dried pest control composition includes a polymer, wherein the polymer has a weight average molecular weight from 10,000 to 30,000 daltons and the polymer contains from 20 wt % to 100 wt % of monomeric structural units derived from a monomer with log P of from 2.0 to 6.0 based upon a total weight of the polymer and Bacillus thuringiensis, wherein the spray-dried pest control composition has an average particle diameter from 30 nanometers to 100 microns as measured using Laser Diffraction.