Susceptibility of three species of the genus Ostrinia (Lepidoptera: Crambidae) to Nosema pyrausta (Microsporidia: Nosematida)

Abstract

Microsporidia are obligate intracellular parasites that affect the population density of many insect pests. In particular, infection with Nosema pyrausta is one of the major mortality factors for the European corn borer Ostrinia nubilalis, the Asian corn borer Ostrinia furnacalis and the adzuki bean borer Ostrinia scapulalis. The purpose of the work is to compare the susceptibility to N. pyrausta and pathogenesis of three species of moths of the genus Ostrinia. Studies conducted over 2 years have shown that in all three species of host insects under laboratory conditions, both during oral infection and transovarian transmission of infection (in the daughter generations of experimentally infected insects), only diplokaryotic spores formed corresponding to the main morphotype of the genus Nosema. Mean lethal time increased with instar of larvae used for infection but didn’t differ between the three species. The rates of transovarial transmission of N. pyrausta were also similar. Thus, all the insect species examined may equally participate in the parasite persistence in nature and serve as model laboratory hosts for parasitological research and mass propagation of the microsporidium.

Fungi of entomopathogenic potential in Chytridiomycota and Blastocladiomycota, and in fungal allies of the Oomycota and Microsporidia

“…(Bekircan 2020) Nosema maddoxiBrown marmorated stink bug, Halyomorpha halys (Hemiptera: Pentatomidae)(Preston et al 2020b;Preston et al 2020a)Nosema pernyiThe Chinese oak silkworm Antheraea pernyi (Lepidoptera: Saturniidae)(Liu et al 2020)Nosema pyraustaEuropean corn borer Ostrinia nubilalis, the Asian corn borer Ostrinia furnacalis and the adzuki bean borer Ostrinia scapulalis(Grushevaya et al 2018;Grushevaya et al 2020) Mosquito larvae from species of Culex, Culiseta, Aedes, Anopheles, Psorophora, and Uranotaenia(Scholte et al 2004;Balaraman et al 2006;Rueda- Páramo et al 2017;Dahmana and Mediannikov 2020;Gao et al 2020) …”