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Related Experiment Video

Updated: May 24, 2026

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Population decrease of Scirpophaga incertulas Walker (Lepidoptera Pyralidae) under climate warming.

Peijian Shi, Ling Zhong, Hardev S Sandhu

    Ecology and Evolution
    |March 13, 2012
    PubMed
    Summary
    This summary is machine-generated.

    Climate warming, indicated by minimum annual temperature, is decreasing the population of the agricultural pest Scirpophaga incertulas in Southern China. Generalized additive models effectively predicted these population dynamics.

    Keywords:
    Density dependenceGeneralized additive modelsGrowth rateLinear modelMinimum annual temperature

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    Area of Science:

    • Agricultural Entomology
    • Climate Change Ecology
    • Population Dynamics

    Background:

    • Scirpophaga incertulas Walker is a significant agricultural pest in Asia.
    • Limited research exists on its long-term population dynamics concerning climate warming.
    • Understanding population fluctuations is crucial for effective pest management strategies.

    Purpose of the Study:

    • To analyze the long-term population dynamics of Scirpophaga incertulas.
    • To investigate the influence of density dependence and minimum annual temperature (MAT) on pest populations.
    • To assess the impact of climate warming on Scirpophaga incertulas population trends.

    Main Methods:

    • Utilized a historical dataset spanning over 50 years from Xinfeng County, China.
    • Employed linear models and Generalized Additive Models (GAMs) for data analysis.
    • Evaluated the goodness-of-fit and applicability of different modeling approaches.

    Main Results:

    • Both density dependence and MAT significantly affected the annual population growth rate of Scirpophaga incertulas.
    • Generalized Additive Models demonstrated superior applicability and goodness-of-fit (R(2) > 0.5) compared to linear models.
    • An increase in MAT was significantly correlated with a decrease in the annual population growth rate of the pest.

    Conclusions:

    • Climate warming, reflected by rising MAT, is leading to a decline in Scirpophaga incertulas populations in Southern China.
    • The study provides a robust method for predicting the annual population growth rate of this pest.
    • Findings highlight the significant impact of climate warming on agricultural pest dynamics and suggest potential reductions in pest populations.