{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,29]],"date-time":"2026-06-29T11:47:49Z","timestamp":1782733669472,"version":"3.54.5"},"reference-count":0,"publisher":"Knowledge E DMCC","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAD"],"abstract":"<jats:p>Background: The German cockroach, Blattella germanica (Blattaria: Ectobiidae), is a worldwide urban pest. Due to limitations of conventional insecticides, alternative controls are needed. Entomopathogenic fungi-based biopesti\u00adcides offer a promising solution. This study evaluated the pathogenicity of the indigenous Beauveria bassiana Rasht strain (Mcb18) against the German cockroach.\r\nMethods: A laboratory colony of B. germanica was maintained under controlled conditions. The toxicity of four spore concentrations (1.5\u00d710\u00b2, 1.5\u00d710\u2074, 1.5\u00d710\u2076, 1.5\u00d710\u2078 conidia\/ml) of B. bassiana was evaluated against adult cockroaches using the direct immersion bioassay. Daily mortality was recorded for 21 days using three replicates of 20 cockroaches each (n=60 per concentration). The lethal concentration (LC50 and LC90) values were estimated us\u00ading probit analysis.\r\nResults: Beauveria bassiana caused dose-dependent mortality. The highest cumulative mortality (100%) was ob\u00adserved at 1.5\u00d710\u2078 conidia\/ml, while the lowest (15.79%) occurred at 1.5\u00d710\u00b2 conidia\/ml. The LC50 and LC90 were estimated as 4.23\u00d710\u00b3 conidia\/ml and 1.59\u00d710\u2076 conidia\/ml, respectively. The LT50 decreased with increasing concen\u00adtration, reaching 8.475 days at 1.5\u00d710\u2078 conidia\/ml. Conidiation on cadavers increased with concentration but re\u00admained lower than mor\u00adtality, indicating that death often occurred before external sporulation. One-way ANOVA revealed significant differ\u00adences in mortality rates (F=74.942, df=(3, 8), p&lt;0.001). Post-hoc Tukey's HSD test showed that the two highest concen\u00adtrations (1.5\u00d710\u2076 and 1.5\u00d710\u2078 conidia\/ml) were not significantly different from each oth\u00ader (p&gt;0.05), although both caused significantly higher mortality than lower concentrations (p&lt;0.001).\r\nConclusion: Experimental findings confirmed B. bassiana as an effective entomopathogen against B. germanica, caus\u00ading significant mortality through cuticular penetration and internal proliferation<\/jats:p>","DOI":"10.18502\/jad.v19i4.21213","type":"journal-article","created":{"date-parts":[[2026,4,13]],"date-time":"2026-04-13T10:22:30Z","timestamp":1776075750000},"source":"Crossref","is-referenced-by-count":0,"title":["Evaluation of the Pathogenicity of Beauveria bassiana Biopesticide against Blattella germanica (Blattaria: Ectobiidae)"],"prefix":"10.18502","author":[{"given":"Behzad","family":"Nourozi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shahyad","family":"Azari-Hamidian","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Farzad","family":"Majidi-Shilsar","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohammad","family":"Noori Sepehr","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohammad","family":"Naimi-Joubani","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"7770","published-online":{"date-parts":[[2026,4,13]]},"container-title":["Journal of Arthropod-Borne Diseases"],"original-title":[],"link":[{"URL":"https:\/\/publish.kne-publishing.com\/index.php\/JAD\/article\/download\/21213\/19704","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/publish.kne-publishing.com\/index.php\/JAD\/article\/download\/21213\/19704","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,6,29]],"date-time":"2026-06-29T11:36:10Z","timestamp":1782732970000},"score":1,"resource":{"primary":{"URL":"https:\/\/publish.kne-publishing.com\/index.php\/JAD\/article\/view\/21213"},"secondary":[{"URL":"https:\/\/jad.tums.ac.ir\/index.php\/jad\/article\/view\/1776","label":"UNIVERSITY"}]},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,4,13]]},"references-count":0,"URL":"https:\/\/doi.org\/10.18502\/jad.v19i4.21213","relation":{},"ISSN":["2322-2271","1735-7179"],"issn-type":[{"value":"2322-2271","type":"electronic"},{"value":"1735-7179","type":"print"}],"subject":[],"published":{"date-parts":[[2026,4,13]]}}}