Impact of Nosema maddoxi on the survival, development, and female fecundity of Halyomorpha halys.

Autor: Preston CE; Department of Entomology, 129 Garden Ave., Cornell University, Ithaca, NY 14853-2601, USA. Electronic address: cp597@cornell.edu., Agnello AM; Department of Entomology, Cornell AgriTech, 15 Castle Creek Dr., Geneva, NY 14456-1371, USA. Electronic address: ama4@cornell.edu., Vermeylen F; Cornell Statistical Consulting Unit, 104 Academic Surge A, Cornell University, Ithaca, NY 14853, USA. Electronic address: fmv1@cornell.edu., Hajek AE; Department of Entomology, 129 Garden Ave., Cornell University, Ithaca, NY 14853-2601, USA. Electronic address: aeh4@cornell.edu.
Jazyk: angličtina
Zdroj: Journal of invertebrate pathology [J Invertebr Pathol] 2020 Jan; Vol. 169, pp. 107303. Date of Electronic Publication: 2019 Dec 05.
DOI: 10.1016/j.jip.2019.107303
Abstrakt: Nosema maddoxi Becnel, Solter, Hajek, Huang, Sanscrainte, & Estep, a microsporidian species native to the United States, has been found infecting the invasive brown marmorated stink bug, Halyomorpha halys (Stål). Microsporidian infections in insects often shorten lifespans, decrease fecundity, prolong development, and stunt growth. This study was conducted to determine the impact of N. maddoxi on H. halys fitness. Adult females (2 doses) and nymphs (1 dose) drank suspensions of N. maddoxi spores to promote infection. Adult females receiving a high dose died faster than the controls. Nosema maddoxi infections impacted female egg production and egg viability at both doses compared with the controls. Infections were transmitted to 34.9% of adult males caged with infected females. As the number of days after inoculation increased, infection intensity (# spores found within an infected individual) for both adult treatments transitioned from low-intensity to high-intensity. Infected nymphs died significantly sooner than the controls. Of the treated nymphs, 55.9% died before molting into the fourth instar and only 26.5% eclosed to adults. Nymphal development rate and size were not impacted by N. maddoxi infection. These results indicate that N. maddoxi infection can negatively impact the lifespan of adult females, female fecundity, egg viability, and nymphal survival, which we hypothesize would negatively impact H. halys population densities.
(Copyright © 2019 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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