The Senegalese grasshopper Oedaleus senegalensis (Krauss, 1877): Dynamics and socio-economic impact in Senegal

The Senegalese grasshopper Oedaleus senegalensis (Krauss, 1877): Dynamics and socio-economic impact in Senegal | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article The Senegalese grasshopper Oedaleus senegalensis (Krauss, 1877): Dynamics and socio-economic impact in Senegal Mamour Toure, Ariane Cease, Amadou Fall, Amsata Diop, Esther Diouf, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4636385/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 5 You are reading this latest preprint version Abstract This study conducted in Senegal from July to October 2021 aims to study the population dynamics of the Senegalese grasshopper, Oedaleus senegalensis (Krauss), estimate its economic impact and evaluate the implementation of a community-based control strategy. Two hundred and fifty (250) farmers, each with a one-hectare fertilized field and a control field of the same size, were selected in the regions of Fatick, Kaffrine, Thies and Saint Louis. The millet variety souna III was sown in both types of fields, and the fertilized fields received 150 kg of Nitrogen, Phosphate, Potassium (NPK) fertilizer and 150 kg of urea. Larval development stages and generations are determined by repeated sampling in time and space. The density of O. senegalensis was assessed in the fields using the quadrat method and the pedestrian transect method. Damage was estimated by determining the percentage of attack on millet leaves and ears, and by comparing field harvests. The 500 hectares were surveyed 1,500 times. Three generations were identified with all developmental stages except in Saint Louis, where two generations were observed. Oedaleus senegalensis movements and densities decreased in Kaffrine, Fatick, Thies and Saint Louis, following the rainfall gradient. It is more present in control fields, with an average density of 20.25 insects/are and attack rates of 15%, than in fertilized fields, with 8.5 insects/are and attack rates of 2%. Harvests averaged 813.95 kg/ha in fertilized fields versus 435.30 kg/ha in control fields. Fertilization, which increases the protein content of millet, is a means of controlling the insect. Oedaleus senegalensis density damage millet control Full Text Cite Share Download PDF Status: Under Review Version 1 posted Reviewers agreed at journal 31 Aug, 2024 Reviewers invited by journal 31 Aug, 2024 Editor invited by journal 13 Jul, 2024 Editor assigned by journal 11 Jul, 2024 First submitted to journal 10 Jul, 2024 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4636385","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":347762845,"identity":"228d5dd1-327a-411d-96e7-2b8e3a5c8eb8","order_by":0,"name":"Mamour Toure","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA6UlEQVRIiWNgGAWjYNCDDwwMCUDKgCjFEiCCcQbJWph5iNGi23468THvHoY6fonch49t22rzGNibt0kw/LmDU4vZmdzNxjzPGCQkZ6QbG+e2HS9m4DlWJsHY9gy3lgO526R5DjBIGNxIY5PObTuW2CCRYybB2HAYt5bzb+Fa2H9bgrTIvzEDOgyPlhtItjAzttUAbeEBamHDp+XtZsM5ByQkZ/Y8Y5bsOXegmI0nrdgisQ2fw3I3PnhzwIafnz2N8cOPsro8fvbDG298wOMwKJCAMQ4zsIGoBEIakEAdCWpHwSgYBaNgpAAAQjtQwJkIOiAAAAAASUVORK5CYII=","orcid":"","institution":"Gaston Berger University: Universite Gaston Berger","correspondingAuthor":true,"prefix":"","firstName":"Mamour","middleName":"","lastName":"Toure","suffix":""},{"id":347762846,"identity":"474225d5-23fa-400f-988f-19270851b9a9","order_by":1,"name":"Ariane Cease","email":"","orcid":"","institution":"Arizona State University - 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The millet variety souna III was sown in both types of fields, and the fertilized fields received 150 kg of Nitrogen, Phosphate, Potassium (NPK) fertilizer and 150 kg of urea. Larval development stages and generations are determined by repeated sampling in time and space. The density of \u003cem\u003eO. senegalensis\u003c/em\u003e was assessed in the fields using the quadrat method and the pedestrian transect method. Damage was estimated by determining the percentage of attack on millet leaves and ears, and by comparing field harvests. The 500 hectares were surveyed 1,500 times.\u003c/p\u003e \u003cp\u003eThree generations were identified with all developmental stages except in Saint Louis, where two generations were observed. \u003cem\u003eOedaleus senegalensis\u003c/em\u003e movements and densities decreased in Kaffrine, Fatick, Thies and Saint Louis, following the rainfall gradient. 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