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Facet-Dependent Lethality of a Contact Insecticide Crystal.

Jingxiang Yang¹, Chunfeng Zhang¹, Xiaolong Zhu²

¹State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, National Engineering Research Center of Pesticide, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin 300071, China.

ACS Applied Materials & Interfaces

|September 13, 2024

Summary

This summary is machine-generated.

Insecticide efficacy varies by crystal facet. Different crystal faces of DDT (1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane) showed up to 75% difference in insect lethality, linked to molecular detachment energy.

Keywords:

crystal habit detachment energy facet-dependent insecticide lethality

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Area of Science:

Insect toxicology
Materials science
Crystallography

Background:

Contact insecticides function by surface molecule extraction.
Crystal anisotropy suggests varying surface molecule energies and bioavailability.
Facet-dependent lethality of insecticides remains uninvestigated.

Purpose of the Study:

To investigate the facet-dependent lethality of crystalline insecticides.
To correlate insecticidal activity with crystal surface properties.

Main Methods:

Examined bioactivity of different crystal facets of DDT (1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane).
Utilized computational methods to determine molecular detachment energies from crystal surfaces.

Main Results:

Significant facet-dependent lethality differences (up to 75%) observed among four unique DDT crystal facets.
Lethality strongly correlated with molecular detachment energies from respective facets.

Conclusions:

Crystal facet significantly influences insecticide efficacy.
Controlling crystal habit offers a strategy to enhance contact insecticide effectiveness.