Viscous Bark Coating Traps Leafhopper Larvae
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Solution Overview
Problem
Current methods for preventing the emergence of larvae through a plant's bark, such as those causing Flavescence Dorée disease, are ineffective before larvae surface and require frequent insecticide applications, posing environmental and health risks, and are not compatible with organic farming standards.
Innovation Solution
Applying a viscous layer with specific dynamic viscosity and stickiness to the plant's bark to seal emergence passages, trapping larvae and preventing them from reaching the foliage, which can be of natural or synthetic origin and applied during specific temperature and pruning conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insecticides are sprayed on foliage to destroy larvae, then insect mortality increases, but environmental pollution and health risks increase
Solution Approach 1:
The patent introduces an intermediary substance (adhesive layer or viscous composition) between the bark surface and the external environment. This intermediary traps larvae attempting to emerge from the bark, preventing them from reaching the foliage where they would otherwise be treated with insecticides. The mediator physically confines the larvae without requiring chemical insecticide application, thereby reducing environmental pollution while maintaining effective larva control.
2Reliability
If insecticides are applied frequently to control emerging larvae, then larva elimination effectiveness improves, but treatment complexity and cost increase
Solution Approach 1:
The patent applies a preventive measure (adhesive layer or viscous composition) to the bark surface before larvae emerge. This preliminary action creates a trap that captures larvae as they attempt to exit the bark, eliminating the need for repeated insecticide applications throughout the season. By acting in advance and establishing a continuous barrier, the treatment reduces complexity while maintaining high elimination effectiveness.
3Reliability
If large quantities of insecticide are sprayed to treat foliage, then larva coverage improves, but substance loss and environmental impact increase
Solution Approach 1:
The patent extracts the control mechanism from the foliage surface and relocates it to the bark surface where larvae originate. Instead of spraying insecticides on leaves to reach larvae, the method places a trapping layer directly at the emergence point on the bark. This extraction of the treatment location eliminates the need for large quantities of insecticide while maintaining complete coverage of the target population.
4Reliability
If conventional insecticide treatments are used, then larva mortality is achieved, but compatibility with organic farming is lost
Solution Approach 1:
The patent replaces the chemical system (insecticides) with a mechanical/physical system (adhesive layer or viscous composition). The trapping mechanism relies on the physical properties of the composition—its viscosity and adhesive characteristics—to confine and immobilize larvae. This mechanical substitution eliminates the need for synthetic insecticides, achieving high mortality rates while maintaining compatibility with organic farming standards.
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 method effectively eliminates 77% of leafhopper larvae, reducing the need for extensive insecticide use, minimizing environmental impact, and is suitable for organic farming, offering higher efficiency than traditional treatments.
Implementation Method 1
the viscous layer has sufficient stickiness (or tack) to allow it to adhere to the wood of the tree to be treated
Implementation Method 2
the viscous layer has a dynamic viscosity of between 15×10 4
Data Source
Figure 1~1A
Figure 2~3
AI summary
The invention relates to a treatment method against leafhopper larvae. According to the invention, the treatment method of a plant (2) to prevent the emergence of larvae through the bark (6) of the plant (2) involves a step of applying a viscous layer (14) against the bark (6) of the plant (2), so as to block at least one passage (10) passing through the bark (6).