Table 1. Phasmarhabditis spp. strains included in this study.
| Strain ID | Species | Contributora | Collection Date | Collection Location | Host |
|---|---|---|---|---|---|
| BAR | P. apuliae | BC CAS | November 2012 | Bari, Italy | Milax sowerbyi |
| MGS | P. bonaquaense | BC CAS | May 2018 | Stakcin, Slovakia | Limax cinereoniger, L. maximus |
| DL305 | P. californica | OSU | April 2018 | Brookings, Oregon | Deroceras reticulatum |
| DL310 | P. californica | OSU | June 2018 | Eugene, Oregon | Deroceras reticulatum |
| ITD046 | P. californica | UCR | January 2013 | McKinleyville, California | Deroceras reticulatum |
| ITD725 | P. californica | UCR | August 2014 | Eureka, California | Deroceras laeve |
| ITD727 | P. californica | UCR | August 2014 | Eureka, California | Deroceras laeve |
| DMG018 | P. californica | LJMU | April 2014 | Pembrokeshire, Wales | Oxychilus draparnaudi |
| DMG019 | P. californica | LJMU | April 2014 | Pembrokeshire, Wales | Oxychilus draparnaudi |
| NZPc | P. californica | Wilson | June 2014 | Tokoroa, Waikato | Deroceras reticulatum |
| DL300 | P. hermaphrodita | OSU | March 2017 | Corvallis, Oregon | Deroceras reticulatum |
| DL307 | P. hermaphrodita | OSU | February 2019 | Salem, Oregon | Deroceras reticulatum |
| DL309 | P. hermaphrodita | OSU | February 2019 | Salem, Oregon | Deroceras reticulatum |
| NZPh | P. hermaphrodita | Wilson | June 2014 | TeMata Peak, Hawke’s Bay | Deroceras invadens |
| ITD056 | P. hermaphrodita | UCR | February 2013 | Sonoma, California | Deroceras laeve |
| ITD207 | P. hermaphrodita | UCR | January 2013 | Eureka, California | Deroceras reticulatum |
| ITD272H2-1 | P. hermaphrodita | UCR | January 2013 | Eureka, California | Deroceras reticulatum |
| ITD290B113 | P. hermaphrodita | UCR | January 2013 | Eureka, California | Lehmannia valentiana |
| ITD803-2 | P. hermaphrodita | UCR | May 2016 | Oakland, California | Deroceras reticulatum |
| KNAH3A | P. hermaphrodita | UCR | November 2018 | Tehama, California | Arion hortensis agg. |
| Nemaslug | P. hermaphrodita | N/A | 1993 | Bristol, England | Deroceras reticulatum |
| DMG002 | P. hermaphrodita | LJMU | January 2014 | Liverpool, England | Arion spp. |
| DMG003 | P. hermaphrodita | LJMU | January 2014 | Liverpool, England | Deroceras panormitanum |
| DMG005 | P. hermaphrodita | LJMU | January 2014 | Liverpool, England | Arion subfuscus |
| DMG006 | P. hermaphrodita | LJMU | January 2014 | Liverpool, England | Arion subfuscus |
| DMG007 | P. hermaphrodita | LJMU | January 2014 | Liverpool, England | Limax flavus |
| DMG008 | P. hermaphrodita | LJMU | February 2014 | Liverpool, England | Deroceras panormitanum |
| DMG009 | P. hermaphrodita | LJMU | February 2014 | Liverpool, England | Deroceras panormitanum |
| DMG010 | P. hermaphrodita | LJMU | February 2014 | Liverpool, England | Milax budapestensis |
| DMG011 | P. hermaphrodita | LJMU | February 2014 | Liverpool, England | Milax budapestensis |
| B1 | P. hermaphrodita | CAS | June 2009 | Benesov u Prahy, Czechia | Deroceras reticulatum |
| CB1 | P. hermaphrodita | CAS | June 2009 | Ceske Budejovice, Czechia | Deroceras reticulatum |
| ROZ | P. hermaphrodita | CAS | June 2010 | Ceske Budejovice, Czechia | Deroceras reticulatum |
| DER | P. hermaphrodita | CAS | June 2011 | Ceske Budejovice, Czechia | Deroceras reticulatum |
| ZZY0412 | P. huizhouensis | HKBU | October 2013 | Huizhou, China | rotting leaves |
| DMG012 | P. neopapillosa | LJMU | January 2014 | Aberdeen, Scotland | Deroceras reticulatum |
| DMG014 | P. neopapillosa | LJMU | January 2014 | Liverpool, England | Limax flavus |
| DMG015 | P. neopapillosa | LJMU | January 2014 | Liverpool, England | Limax flavus |
| DMG016 | P. neopapillosa | LJMU | January 2014 | Liverpool, England | Limax flavus |
| SA4 | P. papillosa | Ross | October 2015 | George, South Africa | Deroceras reticulatum |
| ITD510 | P. papillosa | UCR | July 2013 | San Diego, California | Deroceras reticulatum |
| DL306 | P. papillosa | OSU | August 2018 | Portland, Oregon | Deroceras reticulatum |
| DL308 | P. sp. | OSU | February 2019 | Salem, Oregon | Deroceras reticulatum |
| DF5056 | P. sp. | UCR | May 1993 | Bronx, New York | earthworm |
| EM434 | P. sp. | UCR | April 1990 | Bronx, New York | earthworm |
a Contributor designations are BC CAS = Biology Centre CAS; HKBU = Hong Kong Baptist University; LJMU = Liverpool John Moores University; OSU = Oregon State University; Ross; UCR = University of California, Riverside; Wilson; N/A = not applicable.