Filbertworm Mating Disruption Using E,E-8,10-dodecadienyl Acetate
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Solution Overview
Problem
The existing methods for controlling filbertworms through mating disruption face challenges due to the high cost and limited industrial production of high-purity E,Z-8,10-dodecadienyl acetate, the main component of their natural sex pheromone composition, making it impractical for widespread use.
Innovation Solution
The method involves using E,E-8,10-dodecadienyl acetate, a subsidiary component of the natural sex pheromone composition, at 80% or more, for mating disruption, reducing the number of release positions without altering the dosage per unit area, allowing effective control of filbertworms even in the absence or reduced presence of the main component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If E,Z-8,10-dodecadienyl acetate (main component) is used for mating disruption, then the control effectiveness is improved, but the cost increases and industrial production becomes difficult
Solution Approach 1:
The invention extracts and utilizes the subsidiary component E,E-8,10-dodecadienyl acetate from the natural sex pheromone composition, separating it from the difficult-to-produce main component E,Z-8,10-dodecadienyl acetate. This extraction principle allows the use of only the readily producible subsidiary component for mating disruption, achieving effective control while avoiding the manufacturing difficulties of the main component
Solution Approach 2:
The invention creates a simplified copy of the natural sex pheromone composition by using only the E,E-8,10-dodecadienyl acetate component. This copy, while not identical to the natural composition, retains sufficient biological activity to achieve mating disruption, thereby solving the industrial production feasibility issue
2Ease of operation
If the number of release positions is reduced, then the operation complexity is decreased, but the control effectiveness may be compromised
Solution Approach 1:
The invention changes the chemical parameter of the pheromone composition by using E,E-8,10-dodecadienyl acetate with 80% or higher purity, which has different dispersal and biological activity characteristics compared to the natural mixture. This parameter change enables effective control with fewer release positions, thus reducing operation complexity while maintaining control effectiveness
3Manufacturing precision
If high-purity E,Z-8,10-dodecadienyl acetate is produced through isomerization, then the purity is improved, but the production cost increases significantly
Solution Approach 1:
The invention replaces the expensive main component with the cheaper subsidiary component E,E-8,10-dodecadienyl acetate, which can be produced more economically. Although the natural composition contains both components, the subsidiary component alone is sufficient for effective control, making the overall system more cost-effective
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
This approach effectively controls filbertworm populations by reducing the percentage of nut damage below the standard threshold, demonstrating the efficacy of using the subsidiary component for mating disruption, even with fewer release positions, thus overcoming the limitations of relying solely on the main component.
Implementation Method 1
releasing and floating in an air an artificially synthesized sex pheromone component of an insect pest
Data Source
AI summary
There is provided a method of controlling filbertworm capable of reducing the number of release positions without changing a dosage amount per unit area. More specifically, there is provided a method of controlling filbertworm comprising the step of: providing E,E-8,10-dodecadienyl acetate or a composition comprising 80% by weight or more of E,E-8,10-dodecadienyl acetate at 1 to 100 release positions/ha to release the E,E-8,10-dodecadienyl acetate at a release rate of from 0.01 to 5 g/day/ha for mating disruption.