dsRNA Gene Silencing for Red Palm Weevil Control

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Solution Overview

Problem

Current methods for controlling insect pests, such as the red palm weevil, rely heavily on chemical pesticides that are non-selective, persistent in the environment, and lead to resistance, necessitating the development of environmentally friendly and selective alternatives.

Innovation Solution

The use of double-stranded RNA (dsRNA) molecules specifically designed to target and inhibit the expression of genes in pests, such as the red palm weevil, leading to cessation of feeding, growth, development, reproduction, or death, through ingestion or expression in transgenic plants.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If chemical pesticides are used to control pest infestations, then pest control effectiveness is improved, but environmental harm and pesticide resistance increase

Engineering Contradiction:

Improvepest control effectivenessVSAvoidenvironmental harm

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces chemical pesticides with RNA interference (RNAi) molecules, specifically double-stranded RNA (dsRNA), to control pest infestations. The dsRNA targets and silences essential genes in the red palm weevil, causing cessation of feeding, growth, development, reproduction, or death. This substitution eliminates the environmental harm and resistance issues associated with chemical pesticides while maintaining effective pest control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent uses dsRNA as an intermediary molecule that mediates pest control by targeting specific gene sequences in the red palm weevil. The dsRNA acts as a selective agent that enters the pest's system and triggers RNAi, leading to gene silencing. This intermediary approach provides selective toxicity to the pest while being environmentally benign and non-persistent in the ecosystem.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If chemical pesticides are applied repeatedly to control resistance, then pest control effectiveness is maintained, but environmental persistence and accumulation increase

Engineering Contradiction:

Improvepest control effectivenessVSAvoidenvironmental persistence

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent employs dsRNA molecules that are biodegradable and short-lived in the environment compared to persistent chemical pesticides. The RNAi mechanism acts selectively on the pest without accumulating in the environment or food chain. This disposable approach maintains pest control effectiveness through repeated applications while avoiding environmental persistence and accumulation issues.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Productivity

If non-selective pesticides are used to eradicate infestations, then pest elimination is improved, but harm to non-target fauna increases

Engineering Contradiction:

Improvepest elimination efficiencyVSAvoidharm to non-target fauna

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent applies the principle of local quality by designing dsRNA with sequence specificity targeting essential genes only in the red palm weevil. The dsRNA does not affect non-target fauna because the RNAi mechanism is sequence-specific and the target genes are unique to the pest species. This localized approach achieves complete pest elimination while preserving non-target organisms in the ecosystem.

Inventive Principle:

Principle #3Local quality

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 provides a selective and biodegradable means to control pest infestations, reducing environmental impact and pesticide resistance, while effectively limiting or eliminating pest populations.

Implementation Method 1

RNA interference (RNAi) is a process utilizing endogenous cellular pathways, whereby an interfering RNA (iRNA) also referred to as RNA interference (RNAi) molecule (e.g., a dsRNA molecule) that is specific for all, or any portion of adequate size, of a target gene sequence, results in the degradation of the mRNA encoded thereby.

Methodology Applied

Scientific EffectRNA interference (RNAi):

Data Source

PatentUS12102092B2Compositions and methods for mitigating pest infestation

Publication Date: 2024.10.01 PLANTARC BIO LTD

AI summary

dsRNA for preventing, mitigating and/or treating infestation of a plant with red palm weevil (Rhynchophorus ferrugineus), the dsRNA comprising a polynucleotide sequence which is about 85% to about 100% complementary to a segment of a target gene of the red palm weevil, wherein ingestion of the dsRNA polynucleotide by the red palm weevil results in mortality and/or stunting thereof.