Mosquito Mesh with Differential Widths and Multi-Agent Coating
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Solution Overview
Problem
Existing methods for reducing contact with blood-feeding arthropods, such as mosquitoes, are less effective over time due to pesticide resistance, and they do not adequately target mosquitoes at various stages of their lifecycle or breeding sites.
Innovation Solution
A mesh structure coated with an electrostatic composition that binds (bio)pesticidal agents, including immediate and slow-kill mechanisms, which can be applied to various substrates and delivery systems, incorporating differential mesh widths, colors, temperatures, and odors to attract and contaminate mosquitoes, combined with insect growth regulators and fungal spores to disrupt mosquito development and resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical pesticides are impregnated in mesh structures, then mosquitoes are killed upon contact, but arthropods develop resistance to the pesticides over time
Solution Approach 1:
The patent combines multiple pesticidal agents from different chemical classes (pyrethroids and chlorfenapyr) on the same mesh structure. This combination approach addresses resistance by targeting mosquitoes with multiple mechanisms of action simultaneously, preventing resistance development that would occur with single-agent applications.
Solution Approach 2:
The mesh structure uses composite impregnation with multiple pesticide compounds having different modes of action. This composite approach ensures that mosquitoes cannot develop resistance to all agents simultaneously, maintaining long-term effectiveness while preserving the reliability of mosquito control.
2Speed
If immediate kill pesticides are used, then visible results are obtained quickly, but strong selection pressure causes rapid resistance development
Solution Approach 1:
The patent merges immediate-kill pyrethroids with slower-acting chlorfenapyr on the mesh structure. This combination provides quick visible results from the pyrethroid while the chlorfenapyr acts more slowly, reducing selection pressure and delaying resistance development.
Solution Approach 2:
The patent changes the temporal parameter of pesticide action by combining fast-acting and slow-acting compounds. This parameter diversification ensures rapid initial mosquito mortality while maintaining long-term control through the slower-acting agent that exerts weaker selection pressure.
3Object-affected harmful factors
If mesh structures with small mesh width are used, then mosquitoes cannot fly through, but ventilation is reduced
Solution Approach 1:
The mesh structure acts as an intermediary barrier that mosquitoes must physically contact to enter the dwelling. The mesh openings are sized to prevent mosquito passage while allowing air flow, and the pesticidal coating on the mesh provides an additional protective layer that kills mosquitoes attempting to pass through.
Solution Approach 2:
The mesh structure has different functional zones: the physical mesh barrier prevents mosquito entry while maintaining ventilation, and the pesticidal coating provides localized killing action on mosquito contact points. This spatial differentiation of functions resolves the contradiction between physical blocking and air flow.
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 mesh structure effectively kills mosquitoes and disrupts disease transmission by ensuring contact with pesticidal agents, reducing resistance development and enhancing mosquito susceptibility to insecticides, thereby providing a comprehensive solution for controlling mosquito-borne diseases.
Implementation Method 1
The affordable and easy to manufacture electrostatic coating is capable of holding and binding usually the powders which include the agents
Implementation Method 2
efficient transfer of the powder(s) to the arthropod is effected when it lands on and/or makes bodily contact otherwise with the mesh structure that is prepared with that coating
Data Source
Figure 1~2C
Figure 3A~3C
Figure 3D
AI summary
It is described a mesh structure in the form of a gauze, net, cloth, screen, grid or fabric on to which one or more agents are provided comprising WHO-recommended insecticides effective against mosquitoes and other flying insects and/or an insect growth regulator effective against larvae and/or adults, such as pyriproxyfen effective against mosquito larvae and/or a fungus, such as Beauveria bassiana, and/or Metarhizium anisopliae, and/or an intensifying agent, such as non-synthetic or synthetic silica, or diatomaceous earth which dissolves upon contact with the cuticula of target pests. The mesh structure has parts with differing mesh widths, whereby the agents are provided on the mesh structure part, which has a larger mesh width. The parts of the mesh structure have different aspects to enhance the attractiveness: colours and/or contrasts, odours and/or physical parameters (like temperature), and hair-like structures or contact surface enhancing features for effectively attracting and exposing target pests, such as malaria mosquitoes.