Working Paper Article Version 1 This version is not peer-reviewed

Effects of Selection to Diflubenzuron and Bacillus Thuringiensis Var. Israelensis on the Overwintering Successes of Aedes albopictus (Diptera: Culicidae)

Version 1 : Received: 9 August 2021 / Approved: 10 August 2021 / Online: 10 August 2021 (08:13:40 CEST)

A peer-reviewed article of this Preprint also exists.

Ioannou, C.S.; Hadjichristodoulou, C.; Mouchtouri, V.A.; Papadopoulos, N.T. Effects of Selection to Diflubenzuron and Bacillus thuringiensis Var. Israelensis on the Overwintering Successes of Aedes albopictus (Diptera: Culicidae). Insects 2021, 12, 822. Ioannou, C.S.; Hadjichristodoulou, C.; Mouchtouri, V.A.; Papadopoulos, N.T. Effects of Selection to Diflubenzuron and Bacillus thuringiensis Var. Israelensis on the Overwintering Successes of Aedes albopictus (Diptera: Culicidae). Insects 2021, 12, 822.

Journal reference: Insects 2021, 12, 822
DOI: 10.3390/insects12090822

Abstract

Aedes albopictus is an invasive mosquito species responsible for local transmission of chikungunya and dengue viruses in Europe. In the absence of available treatments, insecticides-based control is one of the most important viable strategies to prevent emerging problems. Diflubenzuron (DFB) and Bacillus thuringiensis var. israelensis (Bti) are among the most commonly used larvicides for Ae. albopictus control which pose major concerns for potential resistance development. Studies on the resistance emergence of Ae. albopictus to both DFB and Bti and its persistence in the wild are essential for the efficient and sustainable planning of the control programs. In this concept, larvae from a recently laboratory established population were subjected to increasing selective pressure for nine successive generations against both DFB and Bti. At the end of this process, the resistance levels and the overwintering success of the selected populations relative to control (colonies that received no selection) were determined. Results revealed a substantial and a moderate increase on the resistance levels following selection with DFB and Bti respectively. Interestingly, the selection process to both larvicides had no apparent impacts on the overwintering capability relative to control suggesting the successful persistence of the resistant individuals in the wild from year to year.

Keywords

Asian tiger mosquito; eggs diapause; insecticides efficacy; mosquito control

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