High-Density Larvicidal Granules for Aerial Application
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Solution Overview
Problem
Existing insecticidal granular compositions with low density struggle to achieve effective aerial application due to limited carrying capacity of aircraft, as they are designed to float on water, resulting in inefficient packing density and increased application costs.
Innovation Solution
A high-density granular composition is developed, comprising a granular carrier with a bacterially derived larvicidal active agent and a non-aqueous liquid of density less than 1, allowing the granules to sink in water while maintaining effective larvicide distribution at the air-water interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If granules are designed with low density to float on water for effective larvicide distribution at the air-water interface, then insect control efficacy is improved, but packing density decreases resulting in limited aircraft carrying capacity and increased application costs
Solution Approach 1:
The patent changes the density parameter of the granule from low (floating) to high (sinking) by incorporating dense granular carriers. This parameter change resolves the contradiction by allowing high packing density for economical aerial application while maintaining insect control efficacy through the non-aqueous liquid's ability to float and distribute larvicide at the air-water interface.
2Quantity of substance
If granules are designed with high density to improve packing density and reduce aerial application costs, then aircraft carrying capacity is improved, but larvicide distribution at the air-water interface becomes less effective
Solution Approach 1:
The patent segments the granule into two functional components: a dense granular carrier that sinks to provide high packing density, and a non-aqueous liquid phase that floats to deliver larvicide at the air-water interface. This segmentation resolves the contradiction by separating the functions of achieving density and maintaining efficacy.
Solution Approach 2:
The patent creates a composite granular composition combining dense granular carriers with non-aqueous liquids containing larvicide. This composite structure allows the granule to sink as a whole (high density) while the liquid component floats and distributes at the interface (effective delivery), resolving the contradiction between packing density and insect control efficacy.
3Reliability
If granules float on water to maintain effective larvicide concentration at the air-water interface, then insect control is improved, but granules are lost during storage and handling due to low density
Solution Approach 1:
The patent changes the density parameter of the granule to high density, causing it to sink during storage and handling. This prevents loss of low-density granules while the non-aqueous liquid component maintains its ability to float and distribute larvicide effectively at the air-water interface during application, resolving the contradiction between efficacy and substance loss.
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 high-density granular composition enhances insect control efficacy by ensuring accurate and economic aerial application, with improved packing density and reduced loss of larvicide during storage and handling, while maintaining effective larvicide distribution at the water surface.
Implementation Method 1
a non-aqueous liquid having a density less than 1
Implementation Method 2
the insecticidal granular composition has an average individual granule density greater than 1 and is adapted to sink in the body of water
Implementation Method 3
a granular carrier in which the larvicidal active and non-aqueous liquid of density less than 1 is absorbed
Data Source
AI summary
An insecticidal granular composition for broadcasting of the granular composition onto a body of water on which insects are to be controlled comprising: a granular carrier of size in range of from 1 to 4 mm; a composition absorbed into the granular carrier comprising a bacterially derived larvicidal active agent and a non-aqueous liquid having a density less than 1; wherein the insecticidal granular composition has an average individual granule density greater than 1 and is adapted to sink in the body of water.