Sandrine Maugin's scientific contributions

... In the work by Idier et al. (2023), the molecular mechanisms underlying insecticide resistance in the codling moth, Cydia pomonella, a significant pest of apple and pear orchards, were investigated. An experimental evolution approach was employed using a wild population of C. pomonella that was already resistant to chlorantraniliprole, deltamethrin, and spinosad. ...

... 7,36,37 Pests have developed multiple complex regulatory mechanisms to enhance their activity of detoxification enzymes to address persecution caused by insecticide exposure. 38,39 In this study, we characterized the transcription factor CpAhR and confirmed that it can effectively activate the expression of key resistance detoxifying genes belonging to GST and P450 superfamilies as well as the enzyme activity of GST but not the P450, thereby increasing the resistance to lambda-cyhalothrin in C. pomonella. ...

... This explanation is consistent with the finding that the metabolism of the neonicotinoid either increases or decreases its potency depending on the compound and specificity of the nicotinic acetylcholine receptor subtypes [7,8,21,34,35]. The link between neonicotinoids and cockroach nicotinic receptors has been demonstrated in several studies [36][37][38][39][40]. The neonicotinoid agonist actions vary significantly, including partial, full and super activities. ...

... Meanwhile, extensive resistance testing and genetic studies revealed three types (I to III) of field resistance to CpGV with distinguishable patterns of inheritance and differing susceptibility to CpGV isolates belonging to different genome groups [23,26]. Beyond that, newly discovered types of resistance have occurred in France and Italy [27]. The most common type I resistance has been characterized as dominant and Z chromosomal Insects 2022, 13, 533 3 of 8 inherited, highly stable, and probably with no fitness costs [23,28]. ...

... In addition, Lepidoptera currently has the largest number of chromosome-level genomes among animal orders [4,5], and these species have been central to the study of chromosome evolution. Studies of the characteristics and effects of chromosome structural variation in Lepidoptera have enriched our knowledge of animal chromosome evolution [6][7][8][9][10][11]. Previous studies of three chromosome-level assemblies revealed that lepidopteran chromosomes have highly conserved synteny despite 140 million years of divergence [10][11][12][13][14]. However, the greenveined white butterfly (Pieris napi) is an exception, with its chromosome-level genome assembly showing extensive rearrangements, and the cause remains unclear [15]. ...

... These results contradict Řezáč et al. (2010) and Michalko and Košulič (2015), who reported a significantly decreased prey capture efficiency after exposure to fresh dry spinosad residue in with the difference that we exposed spiders to residues for 1 hr, while both of the above studies only 30 min. Another important factor is also the populations, from which the investigated spiders were collected, because some beneficial arthropods from agrochemically threatened agroecosystems show resistance to commonly applied insecticides (Le Navenant, Siegwart, Maugin, Capowiez, & Rault, 2019;Niedobová, Skalský, Ouředníčková, & Michalko, 2020). ...

... Posterior half abdomen was crushed in 110 μL of Hepes buffer (50 mM, pH 7) on the ice and the obtained homogenate was centrifuged at 15000g for 15 min at 4 • C. Supernatant was stored at − 80 • C and was later used for CbE and GST measurements the same day (Bouvier et al., 2002). This method allowed us to monitor activities of these three enzymatic families on the same individual Siegwart et al., 2017). We expected to have detoxification enzymes in the fat and digestive tract that are well present in both parts of the abdomen. ...

... The biogenic cavities and galleries in the branches and fruits exhibited the same pattern and size as described for other crops (Siegwart et al., 2015). ...

... However, despite a good environmental profile, exclusion systems are not totally free of sustainability issues. Siegwart et al. (2013) showed that behavioral adaptation of codling moth to exclusion systems is possible (see Section 2.1.1), in accordance with observations made in laboratory rearings of this species. ...

... Physical protection of fields or of crops is a means to limit pest foraging by making it hostile or inaccessible to insect pests. Such an approach was successfully applied to protect plants from flying insects, for example, Cydia pomonella on apple orchards 4 and Lepidoptera on cabbage and tomato. 5,6 To date, there has been little attention paid to the role of natural interfaces in the limitation of the dispersal of pests. ...