Organic Colloid-Stabilized Emulsion for Reducing Pesticide Spray Drift
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Solution Overview
Problem
Agricultural spraying technologies face challenges in reducing off-target spray drift due to the small droplet sizes of hydraulic spray nozzles, which can lead to significant off-target movement of pesticides, especially around sensitive crops and residential areas, posing phytotoxicity risks even at low concentrations.
Innovation Solution
Incorporating an organic colloid-stabilized oil-in-water emulsion into aqueous pesticidal spray mixtures to increase the median diameter of spray droplets, thereby reducing the propensity for drift and ensuring more targeted application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hydraulic spray nozzles are used to apply pesticides, then spray coverage can be achieved, but small droplet sizes cause high propensity for off-target drift
Solution Approach 1:
The patent changes the physical-chemical parameters of the spray solution by incorporating oil-in-water emulsions with organic colloidal stabilizers. This modifies the spray droplet characteristics, increasing median diameter and reducing the proportion of fine driftable droplets while maintaining spray coverage effectiveness.
Solution Approach 2:
The patent uses composite emulsion systems combining oil phases, water phases, and organic colloid stabilizers (such as micellar casein, gelatin, or synthetic polymers). These composite materials create stabilized emulsion droplets that resist breaking into fine spray droplets, thereby reducing drift while maintaining coverage.
2Manufacturing precision
If spray droplet size is reduced to improve coverage, then more uniform application is achieved, but the percentage of driftable fines increases
Solution Approach 1:
The emulsion system changes the size distribution parameters of spray droplets by stabilizing larger droplet sizes. The organic colloidal stabilizers prevent emulsion breakdown into fine droplets, maintaining a spray profile with higher median diameter and lower fine droplet content while achieving uniform coverage through proper spray calibration.
Solution Approach 2:
Organic colloidal stabilizers act as intermediary substances that mediate between the oil and water phases, creating stable emulsion structures. These intermediaries prevent the formation of fine droplets that would otherwise drift, while still allowing for uniform spray distribution through controlled application.
3Ease of operation
If conventional spray solutions are used, then application simplicity is maintained, but environmental safety around sensitive areas is compromised
Solution Approach 1:
The patent employs composite emulsion formulations that combine pesticide active ingredients with oil-in-water emulsions stabilized by organic colloids. These composite spray solutions maintain ease of application through standard equipment while reducing drift and associated phytotoxicity risks to sensitive areas through their inherent droplet size stabilization properties.
Solution Approach 2:
The patent converts the potential harm of spray drift into a benefit by using emulsion systems that naturally resist droplet breakup. The same properties that prevent drift (emulsion stability, larger droplet sizes) also reduce the harmful impact on sensitive areas, turning a drift problem into a protective feature.
Data Source
AI summary
Spray drift during the application of an aqueous mixture of an auxinic herbicide is reduced by incorporating into a spray mixture an organic colloid-stabilized oil-in-water emulsion.