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However, its impact on key biological control agents, such as the widely used mealybug destroyer Cryptolaemus montrouzieri Mulsant (Coleoptera: Coccinellidae), remains insufficiently investigated. In this study, we assessed the lethal and sublethal effects of recommended field rates of sulfoxaflor on larvae and adults of C. montrouzieri through direct spray treatments and exposure to fresh residues on grapevine plants, comparing its impact with that of acetamiprid. Laboratory bioassays evaluated mortality, development, fecundity, fertility, offspring survival, and demographic parameters following IOBC guidelines and population modeling. Our results show that sulfoxaflor caused significantly lower mortality than acetamiprid, with minimal effects on larvae and no adverse effects on adults. Demographic modeling further indicated that the demographic performance of C. montrouzieri populations was not negatively affected by sulfoxaflor, while the impact of acetamiprid on the predator was primarily driven by high short-term mortality, with only marginal contributions from changes in reproductive performance. According to IOBC classification, sulfoxaflor was categorized as slightly harmful (class 2) for larvae and harmless (class 1) for adults, indicating potential compatibility with IPM programs involving augmentative releases of C. montrouzieri. Our findings highlight the value of integrating demographic modeling into IOBC assessments to improve ecotoxicological risk evaluation of insecticides on biological control agents.<\/jats:p>","DOI":"10.1093\/jee\/toag287","type":"journal-article","created":{"date-parts":[[2026,9,4]],"date-time":"2026-09-04T11:21:59Z","timestamp":1788520919000},"source":"Crossref","is-referenced-by-count":0,"title":["Comparative lethal and sublethal effects of sulfoxaflor and acetamiprid on\n                    <i>Cryptolaemus montrouzieri<\/i>\n                    (Coleoptera: Coccinellidae): integrating IOBC classification and matrix population modeling"],"prefix":"10.1093","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0664-3854","authenticated-orcid":false,"given":"Laura","family":"Depalo","sequence":"first","affiliation":[{"name":"Dipartimento di Scienze e Tecnologie Agro-Alimentari, Alma Mater Studiorum - Universit\u00e0 di Bologna , Bologna,","place":["Italy"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6061-2752","authenticated-orcid":false,"given":"Antonio","family":"Masetti","sequence":"additional","affiliation":[{"name":"Dipartimento di Scienze e Tecnologie Agro-Alimentari, Alma Mater Studiorum - Universit\u00e0 di Bologna , Bologna,","place":["Italy"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Edison","family":"Pasqualini","sequence":"additional","affiliation":[{"name":"Dipartimento di Scienze e Tecnologie Agro-Alimentari, Alma Mater Studiorum - Universit\u00e0 di Bologna , Bologna,","place":["Italy"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8898-200X","authenticated-orcid":false,"given":"Alberto","family":"Lanzoni","sequence":"additional","affiliation":[{"name":"Dipartimento di Scienze e Tecnologie Agro-Alimentari, Alma Mater Studiorum - Universit\u00e0 di Bologna , Bologna,","place":["Italy"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2026,9,17]]},"reference":[{"key":"2026091717281060200_toag287-B1","doi-asserted-by":"publisher","first-page":"265","DOI":"10.1093\/jee\/18.2.265a","article-title":"A method of computing the effectiveness of an insecticide","volume":"18","author":"Abbott","year":"1925","journal-title":"J. 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