Microemulsion formulation of a new biopesticide to control the diamondback moth (Lepidoptera: Plutellidae).

Sci Rep

Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China.

Published: July 2018

AI Article Synopsis

  • The study aimed to create a microemulsion formulation of norcantharidin to effectively control the diamondback moth, a major pest of brassica crops worldwide.
  • The formulation process involved selecting suitable oil phases and surfactants for optimal microemulsion formation, confirmed by pseudo ternary phase diagrams.
  • The final product demonstrated stability and efficacy, with a lethal concentration that suggests a potential eco-friendly alternative to combat pesticide resistance in diamondback moth populations.

Article Abstract

This study was designed to develop a microemulsion formulation of norcantharidin for the control of the diamondback moth (DBM), Plutella xylostella (Linnaeus), a notorious pest of brassica crops worldwide. The oil phase was screened and selected based on norcantharidin solubility while the surfactants were selected on the basis of their efficiency to form microemulsion. Optimized batches were selected using pseudo ternary phase diagrams. The microemulsion system were stabilized using mixtures composed of norcantharidin, surfactants (Tx13 and Tw80), and cosurfactant (ethanol). Its physicochemical characteristics were also demonstrated to have a higher cloud point than 72 °C as well as good thermodynamic and dilution stability. In additon, a subsequent insecticidal bioassay indicated that the acute LC for norcantharidin microemulsion to P. xylostella was estimated to be 12.477 mg/L (11.58-13.41, 95% CL). Our results provide an environment-friendly promising alternative to control P. xylostella and possibly contribute to ameliorating any pesticide resistance in P. xylostella.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6043531PMC
http://dx.doi.org/10.1038/s41598-018-28626-0DOI Listing

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