Pheromone Ester Attractants for Long-Tailed Mealybug Control
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Solution Overview
Problem
Current methods for controlling and monitoring the long-tailed mealybug (Pseudococcus longispinus) are ineffective, particularly due to the lack of an effective sex pheromone that can attract and control this pest, and there is a need for environmentally sustainable control methods.
Innovation Solution
Development of attractant compounds and compositions comprising esters derived from 2-(1,5-dimethyl-4-methylenecyclopent-2-en-1-yl)ethyl core, including stereoisomers and mixtures, which are used in attractant devices to lure and potentially disrupt the mating of male Pseudococcus longispinus insects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional chemical treatments are used to control Pseudococcus longispinus, then pest control is achieved, but environmental sustainability is compromised and efficacy is limited
Solution Approach 1:
The invention changes the chemical parameter from conventional broad-spectrum insecticides to specific ester compounds with defined molecular structures (formula I). These compounds target the specific pheromone receptors of P. longispinus, achieving effective control while reducing environmental harm through selective action rather than broad toxicity.
Solution Approach 2:
The invention uses sex pheromone esters as intermediary substances that mediate attraction between male and female P. longispinus. By disrupting this natural communication channel, the pheromone esters effectively control the pest population without requiring direct toxic action, thereby reducing environmental impact while maintaining control efficacy.
2Reliability
If the previously described sex pheromone (2-(1,5,5-trimethylcyclopent-2-en-1-yl)ethyl acetate) is used, then attraction of P. longispinus is attempted, but attraction efficacy is insufficient
Solution Approach 1:
The invention modifies the pheromone chemical structure by changing the substituent group R in formula I from the previously used trimethylcyclopent-2-en-1-yl group to a dimethyl-4-methylenecyclopent-2-en-1-yl group. This structural parameter change results in significantly improved attraction efficacy, allowing effective pest control at lower concentrations.
Solution Approach 2:
The invention optimizes the specific local chemical structure of the pheromone by selecting particular stereoisomers and substituent positions in the cyclopentene ring. This local structural optimization enhances the pheromone's ability to bind to receptor sites on male P. longispinus, improving attraction efficacy without increasing overall concentration requirements.
3Reliability
If biological control agents (parasitoids and predators) are used, then some pest control is achieved, but control completeness is insufficient particularly at end of season
Solution Approach 1:
The invention combines biological control approaches with chemical pheromone disruption in an integrated pest management strategy. The pheromone esters provide continuous control throughout the season by disrupting mating, complementing the seasonal action of biological agents and ensuring complete control from early to late season.
Solution Approach 2:
The pheromone-based attractant and disruptant provides preliminary control action at the beginning of the season and maintains control throughout, preventing pest population buildup that would occur if relying solely on biological agents that become less effective toward the end of the season.
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 compounds effectively attract and control Pseudococcus longispinus populations, providing a sustainable and efficient means for pest management.
Implementation Method 1
the compounds effectively attract and control Pseudococcus longispinus populations, providing a sustainable and efficient means for pest management
Data Source
Figure 1(A)~1(C)
AI summary
The present invention relates to ester compounds comprising a 2-(1,5-dimethyl-4-methylenecyclopent-2-en-1-yl)ethyl core and to a composition that comprises said compounds and attracts the species Pseudococcus longispinus. The present invention also refers to an attractant device for Pseudococcus longispinus comprising said compounds or said composition, preferably incorporated in a carrier, to a method for control and/or monitoring of the populations of insects of the species Pseudococcus longispinus and to the use of the compound, composition or device of the invention for control and/or monitoring of the pest. Finally, the present invention provides a method for preparing the ester compounds of the invention.