Limonene Derivatives for Plant Disease Control via Volatilization

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Solution Overview

Problem

Current methods for controlling rice bacterial leaf blight and rice blast are inadequate, as they rely on chemically synthesized drugs that are not environmentally friendly and can lead to resistance in pests, and there is a need for effective, natural alternatives that can inhibit the growth of pathogens like Xanthomonas oryzae pv. oryzae and Magnaporthe oryzae.

Innovation Solution

A composition containing limonene derivatives, such as carveol, carvone, and limonene oxides, is used to inhibit the growth of these pathogens through direct contact and volatilization, offering a natural and environmentally friendly solution for controlling plant diseases.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If chemically synthesized drugs are used for controlling plant diseases, then disease control effectiveness is improved, but environmental friendliness deteriorates and pest resistance develops

Engineering Contradiction:

Improvedisease control effectivenessVSAvoidenvironmental harm and pest resistance

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the chemical composition parameter from synthetic chemicals to natural limonene derivatives, maintaining disease control effectiveness while eliminating environmental harm and resistance issues associated with synthetic drugs

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses naturally occurring limonene derivatives that can be replenished through plant metabolism, replacing persistent synthetic chemicals with renewable natural compounds that degrade safely in the environment

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Object-affected harmful factors

If natural alternatives are used to replace chemically synthesized drugs, then environmental friendliness is improved, but disease control effectiveness may deteriorate

Engineering Contradiction:

Improveenvironmental harmVSAvoiddisease control effectiveness

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent optimizes the concentration and specific composition of limonene derivatives to achieve effective disease control, demonstrating that natural compounds can match or exceed synthetic drug effectiveness when properly formulated

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite formulations containing multiple limonene derivatives working synergistically, enhancing the overall disease control effectiveness beyond what single natural compounds could achieve alone

Inventive Principle:

Principle #40Composite materials

3Reliability

If limonene derivatives are applied to control plant diseases, then pathogen growth inhibition is improved, but continuous application may be needed due to volatilization

Engineering Contradiction:

Improvepathogen growth inhibitionVSAvoidfrequency of application

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent utilizes the volatilization property of limonene derivatives to create continuous protective action in the air around plants, maintaining pathogen inhibition over time through sustained release rather than discrete applications

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The patent employs limonene derivatives as volatile intermediary substances that mediate between the application source and pathogen targets, creating a protective atmosphere that continuously inhibits pathogen growth without direct contact

Inventive Principle:

Principle #24Intermediary (Mediator)

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 limonene derivatives effectively inhibit the growth of Xanthomonas oryzae pv. oryzae and Magnaporthe oryzae, providing a continuous control effect through volatilization and direct contact, with specific compounds like L-carveol and S-(+)-carvone showing strong inhibitory effects, thus addressing the limitations of existing disease control methods.

Implementation Method 1

The limonene derivatives inhibit the growth of these pathogens by not only direct contact with pathogens but also indirect contact (i.e., volatilization) with pathogens

Methodology Applied

Scientific EffectDirect contact inhibition:

Implementation Method 2

The limonene derivatives inhibit the growth of these pathogens by not only direct contact with pathogens but also indirect contact (i.e., volatilization) with pathogens

Methodology Applied

Scientific EffectVolatilization: Evaporation

Data Source

PatentUS11213029B2Composition for plant disease control comprising limonene derivatives as active ingredients

Publication Date: 2022.01.04 KOREA ATOMIC ENERGY RES INST

AI summary

The present invention relates to a composition for controlling plant diseases containing a limonene derivative as an active ingredient. In the present invention, the limonene derivatives have an effect of inhibiting the growth of Xanthomonas oryzae pv. Oryzae (Xoo), which is a pathogen mediating bacterial leaf blight, and Magnaporthe oryzae, which is a pathogen mediating rice blast, and it was confirmed in an experiment with respect to inhibition using volatility (i.e., in a state not being in direct contact with Xoo or M. oryzae) that the limonene derivatives have a growth inhibitory effect. Accordingly, the limonene derivatives have an inhibitory effect against the growth of Xoo and thus they can be effectively used as a composition for controlling plant diseases.