https://www.mbimph.com/index.php/UPJOZ <p style="text-align: justify;"><strong><a href="https://mbimph.com/index.php/index/abstracting-indexing"><img src="https://mbimph.com/public/site/images/dishivam9876mbimph/images.jpg" alt="" width="307" height="144" /></a></strong></p> <p style="text-align: justify;"><strong>UTTAR PRADESH JOURNAL OF ZOOLOGY</strong> (Print ISSN: <a href="https://portal.issn.org/resource/ISSN/0256-971X">0256-971X</a>) <strong>[NLM ID: <a href="https://www.ncbi.nlm.nih.gov/nlmcatalog?term=0256-971X%5BISSN%5D">9879974</a>] </strong>aims to publish high-quality papers in any branch of ZOOLOGY or Animal Biology (it includes studies of the animal kingdom, including the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct, and how they interact with their ecosystems.. It also includes Anthrozoology, Arachnology, Archaeozoology, Bionics, Cetology, Embryology, Ethology, Helminthology, Herpetology, Histology, Ichthyology, Malacology, Mammalogy, Morphology, Nematology, Ornithology, Palaeozoology, Pathology, Primatology, Protozoology, Taxonomy, Zoogeography, Zoography, Zoometry, Zootomy, etc.). This journal considers following types of papers. National Library of Medicine (NLM, USA) catalog included this journal. NLM ID of this journal is <strong>[<a href="https://www.ncbi.nlm.nih.gov/nlmcatalog?term=0256-971X%5BISSN%5D">9879974</a>].</strong> This journal also encourages the submission of useful reports of negative results. This is a peer-reviewed, open access INTERNATIONAL journal. This journal follows OPEN access policy. All published articles can be freely downloaded from the journal website.</p> <p style="text-align: justify;"><strong>Disclaimer:</strong><br />UTTAR PRADESH JOURNAL OF ZOOLOGY (Print ISSN: 0256-971X) was founded by late Prof. Dr. S. C. Goel. UTTAR PRADESH JOURNAL OF ZOOLOGY is academically affiliated to UTTAR PRADESH ZOOLOGICAL SOCIETY, 97-B SRIRAMKRUPA, NEW MANDI, P O BOX 296, MUZAFFARNAGAR, INDIA. This journal is published by MB International Media and Publishing House (MBIMPH) from 2017 (Volume 37).</p> <p style="text-align: justify;"><strong>Society Address:</strong><br />UTTAR PRADESH ZOOLOGICAL SOCIETY, 97-B SRIRAMKRUPA, NEW MANDI, P O BOX 296, MUZAFFARNAGAR, INDIA<br />Website: <a href="https://upzs.in/">www.upzs.in</a></p> <p style="text-align: justify;"><strong>NAAS score 5.24 (2026)<br /></strong></p> MB International Media and Publishing House en-US UTTAR PRADESH JOURNAL OF ZOOLOGY 0256-971X https://www.mbimph.com/index.php/UPJOZ/article/view/5929 <p><strong>Aims: </strong>The present study was undertaken to evaluate the biological control potential of <em>Nesolynx thymus</em> (Girault) against the uzi fly, an important parasitoid of the muga silkworm, <em>Antheraea assamensis</em> Helfer. Particular emphasis was placed on the effects of host age and host density on parasitisation by <em>Nesolynx thymus</em>.</p> <p><strong>Study Design: </strong>The study comprised a laboratory evaluation of the interaction between <em>N. thymus</em> and the uzi fly using uzi fly populations associated with the muga silkworm. Different host ages and host densities were evaluated to determine their influence on parasitisation and parasitoid performance.</p> <p><strong>Place and Duration of Study: </strong>The study was conducted at the Department of Sericulture, College of Agriculture, Assam Agricultural University, Jorhat, Assam, from 2022 to 2023.</p> <p><strong>Methodology: </strong>Uzi fly-infested muga silkworms were maintained under laboratory conditions, and the resulting uzi fly pupae were exposed to <em>N. thymus</em> under predetermined experimental conditions. Observations included host-age preference, percentage parasitisation, parasitoid emergence and other relevant parameters. The observations were summarised using mean values.</p> <p><strong>Results: </strong>The parasitisation response of <em>N. thymus</em> varied among the host ages evaluated. The highest mean parasitisation (86%) was recorded in 1-day-old pupae, whereas the lowest value (14%) was observed in 5-day-old uzi fly pupae. Variation in parasitisation was also observed in response to host density, with the highest value (71%) recorded at a parasitoid-to-host ratio of 3:15. Progeny production also increased with increasing host density.</p> <p><strong>Conclusion: </strong>The findings indicate that <em>N. thymus</em> has potential as a biological control agent against the uzi fly associated with the muga silkworm. Identifying suitable host stages and appropriate parasitoid–host combinations may assist in developing an effective biological control strategy for uzi fly management.</p> Rubi Sut Toko Naan Bidisha Kashyap Roshmi B. Dutta Copyright (c) 2026 Author(s). The licensee is the journal publisher. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. https://creativecommons.org/licenses/by/4.0 2026-10-27 2026-10-27 47 21 1 8 10.56557/upjoz/2026/v47i215929