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Therefore, we surveyed the Azorean Archipelago to isolate new strains of <jats:italic>Heterorhabditis bacteriophora<\/jats:italic> and to evaluate their virulence against the model organism <jats:italic>Galleria mellonella<\/jats:italic> under laboratory conditions. Six strains were obtained from pasture and coastal environments and both nematode and symbiont bacteria were molecularly identified. The bioassays revealed that Az172, Az186, and Az171 presented high virulence across the determination of a lethal dose (LD50) and short exposure time experiments with a comparable performance to Az29. After 72 hours, these virulent strains presented a mean determination of a lethal dose of 11 infective juveniles cm<jats:sup>-2<\/jats:sup>, a lethal time (LT50) of 34 hours, and achieved 40% mortality after an initial exposure time of only 60 minutes. Az170 exhibited an intermediate performance, whereas Az179 and Az180 were classified as low virulent strains. However, both strains presented the highest reproductive potential with means of 1700 infective juveniles\/mg of larvae. The bioassays of the native EPNs obtained revealed that these strains hold the potential to be used in biological control initiatives targeting <jats:italic>P. japonica<\/jats:italic> because of their high virulence and locally adapted to environmental conditions.<\/jats:p>","DOI":"10.1017\/s0022149x24000336","type":"journal-article","created":{"date-parts":[[2024,5,27]],"date-time":"2024-05-27T09:02:31Z","timestamp":1716800551000},"source":"Crossref","is-referenced-by-count":1,"title":["Biocontrol potential of six <i>Heterorhabditis bacteriophora<\/i> strains isolated in the Azores Archipelago"],"prefix":"10.1017","volume":"98","author":[{"given":"R.","family":"Beltr\u00ed","sequence":"first","affiliation":[]},{"given":"H.R.","family":"Monteiro","sequence":"additional","affiliation":[]},{"given":"D.","family":"Toubarro","sequence":"additional","affiliation":[]},{"given":"N.","family":"Sim\u00f5es","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9198-652X","authenticated-orcid":false,"given":"A.","family":"Garriga","sequence":"additional","affiliation":[]}],"member":"56","published-online":{"date-parts":[[2024,5,27]]},"reference":[{"key":"S0022149X24000336_r23","doi-asserted-by":"publisher","DOI":"10.1079\/9780851995670.0115"},{"key":"S0022149X24000336_r1","doi-asserted-by":"publisher","DOI":"10.1016\/0022-2011(90)90053-9"},{"key":"S0022149X24000336_r16","doi-asserted-by":"publisher","DOI":"10.1093\/jee\/84.3.713"},{"key":"S0022149X24000336_r41","doi-asserted-by":"publisher","DOI":"10.1146\/annurev.ento.47.091201.145153"},{"key":"S0022149X24000336_r14","unstructured":"EPPO, R (2014) Harmful organisms in the European Union: Annual report 2014. 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