echemi logo
Product
  • Product
  • Supplier
  • Inquiry
    Home > Food News > Food Articles > "Make-up Girl" Little Red Admiral Flying Cross-border Can't Escape "Sky Eye"

    "Make-up Girl" Little Red Admiral Flying Cross-border Can't Escape "Sky Eye"

    • Last Update: 2021-08-01
    • Source: Internet
    • Author: User
    Search more information of high quality chemicals, good prices and reliable suppliers, visit www.echemi.com


    Beautiful little red admiral, photo courtesy of Nanjing Agricultural University

    Beautiful little red admiral, photo courtesy of Nanjing Agricultural University

    Among the animals flying in the sky, the types and numbers of insects are actually far more than the familiar birds


    On June 22, 2021, the Proceedings of the National Academy of Sciences (PNAS) published online the latest research results of Nanjing Agricultural University professor Hu Gao's team


    Unpredictable migratory insects

    Unpredictable migratory insects

    "Flying insects are the largest animal migration behavior


    Migratory insects include pests, natural enemies, pollinators, and vector insects (such as mosquitoes) that spread human, animal or plant pathogenic microorganisms, which have very important ecological functions


    Hu Gao introduced that in China, most fulminant pests have long-distance migration capabilities


    In addition, "Insects have a short lifespan


    "Our purpose of studying the key environmental factors of interannual changes in population numbers is to find the most critical link that affects population numbers, so that we can make accurate predictions in advance and guide the prevention and control of pests


    The "makeup girl" who has been monitored for a long time

    The "makeup girl" who has been monitored for a long time

    Makeup Girl Little Red Admiral Photo courtesy of Nanjing Agricultural University

    Makeup Girl Little Red Admiral Photo courtesy of Nanjing Agricultural University

    The English name of the little red butterfly is Painted Lady, which means "makeup girl" in Chinese.


    According to researcher Liao Huaijian, a butterfly expert from the Jiangsu Academy of Agricultural Sciences, the small red admiral is widely distributed around the world and is found in many parts of our country


    The small red admiral butterfly migrates from north to north in the tropical regions of North Africa and the sub-Saharan region each spring, and enters Europe.


    Chapman introduced that the long-term systematic monitoring data of the small red admiral in European countries mainly come from citizen scientists, not from government departments


    In fact, they not only monitor the small red admiral, but also other butterflies and moths


    Hu Gao told reporters that American scientists pay more attention to another beautiful migratory butterfly-the Great Spotted Butterfly (also known as the Monarch Butterfly)


    "The study of the migratory law of the little red admiral will give us a very important inspiration for the study of other migratory pests


    Satellite Remote Sensing: Cross-border Investigation of Insect Migration

    Satellite Remote Sensing: Cross-border Investigation of Insect Migration

    Little Red Admiral Photo courtesy of Nanjing Agricultural University

    Little Red Admiral Photo courtesy of Nanjing Agricultural University

    “In this study, we used satellite remote sensing data—Normalized Vegetation Index (NDVI) to reflect the vegetation status in the wintering area


    Based on the satellite remote sensing normalized vegetation index and the long-term monitoring data of the European small red admiralty population, they used the model to screen out three key environmental factors that can predict the small red admiralty population size in the summer occurrence area in Europe: overwintering area, sparse trees in western Africa The NDVI value in winter in the grassland area, the NDVI value in spring in North Africa, and the meridional wind speed during the migration season
    .

    Hu Gao explained that the first two actually refer to the vegetation in the insect source area
    .
    Butterflies migrating into Europe are from the savanna area of ​​western Africa (the southern part of Mali, Niger, Mauritania, most of Burkina Faso, the northern part of Benin, Nigeria and other countries) and the Maghreb region of North Africa (Morocco Ministry and northern Algeria)
    .

    "The better the vegetation conditions in these areas in winter or spring, the better food conditions or nectar plants for the butterflies, the greater the population density of the insect source, and the more butterflies migrating to the north
    .
    " Hu Gao said
    .

    Insects need to rely on wind to fly, and the third factor, meridional wind, refers to the wind from south to north
    .
    "The higher the wind speed, the more conducive to the migration of insects
    .
    "

    The results show that the vegetation status in the overwintering area is closely related to the population size in the summer occurrence area
    .

    Hu Gao believes that this provides new methods and new ideas for the use of satellite remote sensing to monitor and early warning of the population dynamics of migratory insects, especially for major agricultural pests that migrate across borders
    .

    Satellite remote sensing has a large monitoring range and is not limited by time and space.
    There have been many studies using satellite remote sensing to monitor pests and diseases
    .
    But the effect is not ideal
    .
    Because, when the pests and diseases are seen from satellite remote sensing, the occurrence of pests and diseases may have been severe
    .

    "This study shows that we can use satellite remote sensing to monitor the occurrence of insect sources, so as to carry out remote observations on the migration area
    .
    " Hu Gao said that by monitoring the host plants of the insect source to determine the extent of the insect source, To predict the size of the move in
    .

    Since the source of many migratory pests in China is in Southeast Asian countries, such as rice planthoppers and Spodoptera frugiperda, it is difficult to go directly to the source to investigate the occurrence
    .
    Hu Gao emphasized that based on the conclusions of this study, satellite remote sensing can be used to conduct cross-border surveys of pest sources in the future
    .
    (Source: China Science News Li Chen)

    Related paper information: https://doi.
    org/10.
    1073/pnas.
    2102762118

    https://doi.
    org/10.
    1073/pnas.
    2102762118
    This article is an English version of an article which is originally in the Chinese language on echemi.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to service@echemi.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

    Contact Us

    The source of this page with content of products and services is from Internet, which doesn't represent ECHEMI's opinion. If you have any queries, please write to service@echemi.com. It will be replied within 5 days.

    Moreover, if you find any instances of plagiarism from the page, please send email to service@echemi.com with relevant evidence.