Solid Particulate Chitin Synthesis Inhibitors for Pest Control
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Solution Overview
Problem
Pesticide resistance in pest populations, particularly the annual bluegrass weevil, is becoming increasingly challenging due to emergent wild-type resistance and overlapping life cycles, making it difficult to achieve effective control with current insecticides.
Innovation Solution
A pesticidally active solid particulate chitin synthesis inhibitor composition, including benzoylurea compounds like novaluron, diflubenzuron, and lufenuron, is used, which can be formulated as powders or suspension concentrates, providing control independent of pest life stage and reducing resistance development.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional emulsifiable insecticide compositions are used, then initial pest control can be achieved, but pesticide resistance develops and control effectiveness decreases over time
Solution Approach 1:
The patent changes the physical state parameter of the chitin synthesis inhibitor from emulsifiable liquid formulation to solid particulate form. This parameter change enables the inhibitor to remain stable in the environment without degrading, providing sustained control over multiple generations of pests and reducing the development of resistance through prolonged exposure at sub-lethal doses that inhibit chitin synthesis without causing rapid selection pressure.
Solution Approach 2:
The solid particulate chitin synthesis inhibitor provides continuous control action by remaining stable in the environment and continuously inhibiting chitin synthesis in pest larvae. This continuous action extends beyond the immediate application period, controlling current and future generations of pests, thereby maintaining control effectiveness over time and reducing resistance development.
2Productivity
If IGRs are applied to immature insects to control larval stages, then larval mortality is achieved, but evolutionary selection pressure increases and resistant pests survive to reproduce
Solution Approach 1:
The patent changes the mode of action parameter from acute larvicidal action to chronic chitin synthesis inhibition. The solid particulate form provides sustained inhibition of chitin synthesis, causing mortality only when pests complete multiple molts, thereby reducing immediate selection pressure while maintaining control effectiveness across generations.
Solution Approach 2:
The chitin synthesis inhibitor is applied in advance to prevent chitin synthesis during larval development. This preliminary action inhibits the formation of functional exoskeletons, causing mortality to occur only after the pest completes its developmental cycle, thereby preventing resistant adults from reproducing while maintaining control effectiveness.
3Reliability
If multiple pesticide applications are made over time to control overlapping life cycles, then pest control is maintained, but resistance to multiple chemistries develops
Solution Approach 1:
The solid particulate chitin synthesis inhibitor provides universal control across multiple pest generations and life stages. By remaining stable in the environment and continuously inhibiting chitin synthesis, it controls current larvae, emerging adults, and future generations without requiring multiple different chemistries, thereby preventing multi-chemistry resistance.
Solution Approach 2:
The inhibitor provides continuous control action over multiple generations by remaining stable in the environment. This sustained action eliminates the need for multiple sequential applications of different chemistries, thereby preventing the development of resistance to multiple pesticide classes while maintaining control sustainability.
Data Source
AI summary
Compositions and methods for controlling pests are disclosed. The compositions comprise a solid particulate chitin synthesis inhibitor and methods of using the chitin synthesis inhibitor to control a target pest. The chitin synthesis inhibitor is active in its solid form, and provides control of current and future pest generations independent of application timing with respect to insect life stage.