Deltamethrin Application for Hessian Fly Control in Cereals

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Solution Overview

Problem

The Hessian fly (Mayetiola destructor) causes significant damage to wheat, barley, and rye crops by feeding on young plants, leading to stunted growth, yield loss, and poor grain quality, necessitating an effective control method to prevent crop damage and losses.

Innovation Solution

Applying deltamethrin or a composition comprising deltamethrin to the target locus, such as cereal crops, to control and prevent damage by Mayetiola destructor through various application methods including foliar, soil, and seed treatments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional insecticides are used to control Mayetiola destructor, then some pest control effect is achieved, but the control efficacy is insufficient and crop damage continues

Engineering Contradiction:

Improvepest control efficacyVSAvoidcrop damage from Hessian fly

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies deltamethrin, a pyrethroid insecticide with specific chemical parameters (cyano group substitution at the 2-position of the phenyl ring), which provides superior control efficacy against Mayetiola destructor compared to conventional insecticides. This parameter change in the insecticide molecule structure translates to enhanced biological activity and reliable pest control.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If higher doses of insecticides are applied to improve control, then pest mortality increases, but the complexity of application and potential crop damage increase

Engineering Contradiction:

Improvepest mortality rateVSAvoidapplication complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent employs deltamethrin at optimized low doses (0.5-2.0 mg/ha) that achieve high pest mortality through enhanced intrinsic activity of the pyrethroid compound. The short-living nature of the insecticide application is compensated by its high efficacy, eliminating the need for complex repeated applications or high doses.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Reliability

If multiple insecticides are used in combination to improve control, then pest resistance is reduced, but the complexity of the control method increases

Engineering Contradiction:

Improvelong-term pest controlVSAvoidcontrol method complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent utilizes deltamethrin's unique chemical parameters (cyano pyrethroid structure) that provide reliable long-term control through high initial efficacy and mode of action different from conventional insecticides. This single compound approach with optimized parameters achieves long-term reliability without the complexity of combination therapies.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP4215047A1A method of controlling pest

Publication Date: 2023.07.26 UPL CORPORATION LTD(MU)

AI summary

The present invention discloses a method of controlling Hessian fly and controlling or preventing damage caused by the fly at a target locus, preferably cereal crops by contacting the Hessian fly or a target locus with deltamethrin or a composition comprising deltamethrin.