Bacillus sp. D747 and Insecticide Liquid Fertilizer Stability
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Solution Overview
Problem
Existing insecticidal liquid fertilizers face issues with physical stability due to component interactions, leading to inconsistent application and reduced efficacy, and there is a need for effective biological control agents to manage plant pathogens without harming beneficial organisms.
Innovation Solution
A composition combining a biologically pure culture of Bacillus sp. D747 strain with an insecticide, such as bifenthrin, in a formulation compatible with liquid fertilizers, ensuring stability and efficacy in plant growth promotion and pest control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional insecticidal composition is combined with liquid fertilizer, then multiple benefits are conveyed (nutrient supply and pest control), but physical stability deteriorates (phase separation occurs)
Solution Approach 1:
The patent uses a specific surfactant (polyoxyethylene sorbitan monooleate, also known as Tween 80) as an intermediary substance to mediate between the insecticidal composition and liquid fertilizer. This surfactant acts as a compatibility agent that prevents phase separation while allowing both components to function together, thus maintaining physical stability while achieving multiple benefits.
Solution Approach 2:
The patent modifies the formulation parameters by carefully controlling the concentration ratios of insecticide to fertilizer (specifically 0.5:99.5 to 50:50 weight ratios) and optimizing the surfactant concentration (0.1-10% of total composition). These parameter changes ensure compatibility between components while maintaining stability during storage and application.
2Productivity
If insecticide and fertilizer are mixed in application, then application efficiency is improved (single equipment use), but consistency deteriorates (inconsistent application due to degradation)
Solution Approach 1:
The patent performs preliminary formulation work by pre-mixing the insecticidal composition with the compatibility-enhancing surfactant before field application. This preliminary action ensures that the formulation is stabilized in advance, preventing degradation during storage and transport, and ensuring consistent application when used with liquid fertilizer in the field.
3Reliability
If chemical insecticide is used, then pest control efficacy is improved, but environmental impact worsens (harm to beneficial organisms)
Solution Approach 1:
The patent changes the concentration parameters of the insecticide within optimized ranges (maintaining 0.5-50% of total composition) and combines it with biodegradable surfactants. This parameter optimization ensures sufficient pest control efficacy while reducing environmental harm through lower toxic loads and improved biodegradability of the formulation components.
Data Source
AI summary
Compositions and methods are provided for benefiting plant growth. In particular aspects, the compositions contain a biologically pure culture of Bacillus sp. D747 strain (deposited as FERM BP-8234) and an insecticide in a formulation suitable for dissolution in a liquid fertilizer.