Environmental assessment of the influence of pesticides on non-target arthropods using PRIMET, a pesticide hazard model, in the Tiko municipality, Southwest Cameroon

Kenko, Daniel Brice Nkontcheu; Ngameni, Norbert Tchamadeu; Kamta, Parfait Nkontcheu

doi:10.1016/j.chemosphere.2022.136578

Cited by 8 publications

(1 citation statement)

References 45 publications

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“…In order to help combat insecticide resistance, STPMAD implemented a ground ULV rotation in 2020 between insecticides containing resmethrin and deltamethrin. Field data from this trial, in combination with laboratory resistance data, indicate that deltamethrin is effective locally and is of use for mosquito abatement, despite growing concern over its nontarget repercussions (Giordano et al 2020, McGregor et al 2021, Vinha et al 2021, Kenko et al 2022). Considering the apparent failure of resmethrin to reduce mosquito abundance or age, STPMAD is reevaluating whether it should be replaced in rotation by an insecticide with a different mechanism of action (i.e., malathion), used selectively against mosquito species with different resistance profiles, tested at a higher application rate, or eliminated from use entirely.…”

Section: Discussionmentioning

confidence: 92%

Evaluation of ultra-low volume treatments on Culex quinquefasciatus (Diptera: Culicidae) abundance and relative age by parity dissection

DeLisi,

Arreola,

O’Meara

et al. 2023

Journal of Medical Entomology

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St. Tammany Parish Mosquito Abatement District relies on ultra-low volume (ULV) insecticides to manage adult Culex quinquefasciatus (Say 1823), the primary vector of West Nile virus in Louisiana, but abundance rarely declines post-treatment. Three field ULV applications each of adulticides containing deltamethrin, naled, or resmethrin were conducted from May through October 2022 to measure efficacy against free-flying Cx. quinquefasciatus. Female mosquitoes trapped before and after treatment were identified, counted, and age-graded by parity dissection. No insecticide applications reduced Cx. quinquefasciatus abundance, but trials with deltamethrin and naled significantly lowered average mosquito age in the area post-treatment. No trials with resmethrin reduced mosquito age, which corroborates laboratory susceptibility data indicating local resistance toward the pyrethroid. These trials establish parity dissections and relative age gradation as a means of measuring treatment success against Cx. quinquefasciatus.

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