{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T13:30:18Z","timestamp":1786368618185,"version":"build-2736575974"},"reference-count":53,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T00:00:00Z","timestamp":1786320000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100007820","name":"Hangzhou Normal University","doi-asserted-by":"publisher","award":["4105C5022521535"],"award-info":[{"award-number":["4105C5022521535"]}],"id":[{"id":"10.13039\/501100007820","id-type":"DOI","asserted-by":"publisher"}]},{"award":["4105C5022521535"],"award-info":[{"award-number":["4105C5022521535"]}],"id":[{"id":"https:\/\/ror.org\/014v1mr15","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Insects"],"abstract":"<jats:p>Cadmium (Cd) is a pervasive heavy metal pollutant in agricultural ecosystems, posing toxic threats to crop productivity, food safety, and the efficacy of biological control programs. The Asian corn borer (ACB), Ostrinia furnacalis is a destructive lepidopteran pest of maize in East Asia, while Trichogramma ostriniae serves as the most widely applied egg parasitoid for the sustainable management of this pest in integrated pest management (IPM) programs. However, the cascading effects of sublethal Cd stress transmitted from herbivorous hosts to egg parasitoids remain poorly understood. Here, we investigated the sublethal effects of dietary Cd exposure (5.0 mg\/kg) on the development and Cd bioaccumulation of ACB, and subsequently evaluated the parasitism performance of the egg parasitoid T. ostriniae reared on Cd-contaminated host eggs. Results showed that chronic Cd exposure did not significantly affect larval weight, male pupal weight, or female pupal weight of ACB, but significantly increased female adult body weight, indicating stage-specific stimulatory effects. Cd concentrations in larvae, female pupae, and female adults of ACB were markedly elevated following dietary exposure, with the highest Cd loads detected in female pupae (41.23 mg\/kg). However, maternal Cd transfer to eggs did not result in a statistically significant increase in egg Cd concentration. Notably, parasitism by T. ostriniae on Cd-contaminated ACB eggs significantly increased the number of eggs parasitized, although offspring emergence rate and female progeny ratio remained unaffected. This study fills the research gap regarding the trophic transfer of Cd between ACB and T. ostriniae, clarifies the complex bottom-up effects of Cd pollution on host\u2013parasitoid interactions, and provides empirical references for the rational deployment of T. ostriniae as a biocontrol agent in Cd-contaminated maize fields.<\/jats:p>","DOI":"10.3390\/insects17080828","type":"journal-article","created":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T12:47:36Z","timestamp":1786366056000},"page":"828","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Bottom-Up Effects of Dietary Cadmium Exposure on Asian Corn Borer Ostrinia furnacalis and Its Egg Parasitoid Trichogramma ostriniae: Bioaccumulation and Biocontrol Risks"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3100-3290","authenticated-orcid":false,"given":"Jie","family":"Wang","sequence":"first","affiliation":[{"name":"College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-5484-4024","authenticated-orcid":false,"given":"Cheng-Xing","family":"Wang","sequence":"additional","affiliation":[{"name":"Institute of Plant Protection, Shandong Academy of Agricultural Sciences, Jinan 250131, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yan","family":"Li","sequence":"additional","affiliation":[{"name":"College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicolas","family":"Desneux","sequence":"additional","affiliation":[{"name":"Universit\u00e9 C\u00f4te d\u2019Azur, INRAE, UMR-ISA, 06000 Nice, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Su","family":"Wang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bin","family":"Tang","sequence":"additional","affiliation":[{"name":"College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,8,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"316","DOI":"10.1126\/science.adr5214","article-title":"Global soil pollution by toxic metals threatens agriculture and human health","volume":"388","author":"Hou","year":"2025","journal-title":"Science"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"138972","DOI":"10.1016\/j.scitotenv.2020.138972","article-title":"The systematic exploration of cadmium-accumulation characteristics of maize kernel in acidic soil with different pollution levels in China","volume":"729","author":"Feng","year":"2020","journal-title":"Sci. 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Gen.","DOI":"10.1127\/entomologia\/3525"}],"container-title":["Insects"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2075-4450\/17\/8\/828\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T12:51:10Z","timestamp":1786366270000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2075-4450\/17\/8\/828"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,8,10]]},"references-count":53,"journal-issue":{"issue":"8","published-online":{"date-parts":[[2026,8]]}},"alternative-id":["insects17080828"],"URL":"https:\/\/doi.org\/10.3390\/insects17080828","relation":{},"ISSN":["2075-4450"],"issn-type":[{"value":"2075-4450","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,8,10]]}}}