Sexual Attraction Pheromone for Tribolium Castaneum Insect Control
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Solution Overview
Problem
Current insect control devices lack a specific sexual pheromone for Tribolium castaneum, which is essential for targeted pest control, as existing compounds like 4,8-dimethyldecanal attract both males and females, not providing the necessary controlled conditions for bioinsecticides to activate effectively.
Innovation Solution
An isolated sexual attraction pheromone is extracted from male Tribolium castaneum insects using a process involving solid-phase microextraction and capillary gas chromatography, and integrated into an insect control device with a luring composition and insecticide formulation to attract and trap female insects, activating bioinsecticides under controlled humidity conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If 4,8-dimethyldecanal (tribolure) is used as a luring composition, then both male and female insects are attracted, but this prevents achieving controlled conditions for bioinsecticide activation since it does not target only one sex
Solution Approach 1:
The patent segments the attraction function by developing separate luring compositions for male and female insects. The male-attracting composition contains different chemical compounds than the female-attracting composition, allowing selective targeting of one sex at a time. This segmentation enables reliable control conditions by ensuring only the intended sex is attracted to the treatment area.
Solution Approach 2:
Instead of using a general aggregation pheromone that attracts both sexes, the patent inverts the approach by using sex-specific pheromones. The male-attracting composition uses compounds that only male insects respond to, while the female-attracting composition uses compounds that only female insects respond to, thereby achieving selective and controlled attraction.
2Reliability
If a sexual pheromone is used to attract only one sex, then controlled conditions for bioinsecticide activation are achieved, but the device complexity increases due to the need for specific pheromone identification and formulation
Solution Approach 1:
The patent changes the chemical parameters of the luring composition by identifying and using specific pheromone compounds unique to each sex. The male-attracting composition contains specific chemical compounds that differ from those in the female-attracting composition, allowing selective attraction while maintaining manageable formulation complexity through standardized chemical components.
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 device effectively attracts and traps female Tribolium castaneum insects, activating bioinsecticides like Beauveria bassiana microsclerotia, ensuring a controlled and efficient release of insecticides, demonstrated in both laboratory and pilot-scale grain silo experiments.
Implementation Method 1
placing and maintaining the container on a stove to generate volatile organic compounds
Implementation Method 2
extracting the volatile organic compounds from the solid support using solid-phase microextraction fibers
Implementation Method 3
extracting the volatile organic compounds from the solid support using solid-phase microextraction fibers
Implementation Method 4
isolating of the pheromone from the volatile organic compounds by capillary gas chromatography
Implementation Method 5
a central membrane impregnated with the isolated sexual attraction pheromone of Tribolium castaneum
Implementation Method 6
bioinsecticides based on dormant forms of several entomopathogenic fungi may be activated under adequate humidity conditions
Data Source
AI summary
A sexual attraction pheromone exclusively obtained from Tribolium castaneum male insects, a method to obtain said pheromone and a device useful for controlling insects in grain silos are disclosed. The device comprises an outer shell, a membrane impregnated with the sexual attraction pheromone and a nucleus containing an insecticide formulation comprising effective amount of an isolated microsclerotia of Beauveria bassiana and an agronomically acceptable carrier.