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Phenology of brown marmorated stink bug described using female reproductive development. | LitMetric

AI Article Synopsis

  • - Temperature-based degree-day models help predict insect seasonal patterns, specifically focusing on the reproductive timing of the brown marmorated stink bug by analyzing female reproductive physiology.
  • - A five-stage ranking system based on ovary development was used to assess female reproductive status in various locations across the US, revealing that females enter reproductive diapause in fall and experience delayed maturity in spring.
  • - The study found significant geographic differences in the timing of reproduction, influenced by factors like temperature and photoperiod, with variations indicating that the oviposition period is longer in some regions (like NJ) compared to others (like OR).

Article Abstract

Temperature-based degree-day models describe insect seasonality and to predict key phenological events. We expand on the use of a temperature-based process defining timing of reproduction through the incorporation of female reproductive physiology for the invasive pentatomid species the brown marmorated stink bug. A five-stage ranking system based on ovary development was able to distinguish between the reproductive statuses of field-collected females. Application of this ranking method described aspects of ' seasonality, overwintering biology, and phenology across geographic locations. Female were collected in the US from NJ, WV, NC, OR, and two sites in PA in 2006-2008 (Allentown, PA only) and 2012-2014. Results identify that enters reproductive diapause in temperate locations in the fall and that a delay occurs in developmental maturity after diapause termination in the spring. Modification of the Snyder method to identify biofix determined 12.7-hr photoperiod as the best fit to define initiation of reproduction in the spring. Applying the biofix, we demonstrated significant differences between locations for the rate at which the overwintering generation transition into reproductive status and the factors contributing to this difference require further study. For example, after including abiotic variables influencing development such as temperature and photoperiod (critical diapause cue), reproduction occurred earlier in OR and for an extended period in NJ. This data describe a method to investigate insect seasonality by incorporating physiological development across multiple regions that can clarify phenology for insects with overlapping generations.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5587477PMC
http://dx.doi.org/10.1002/ece3.3125DOI Listing

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