major pests<\/a> in soybean culture, it is now found in most of our fields in every season! But what are the consequences of its passage for growers? That is what this new article will explore.<\/p>\n\n\n\nThe damage<\/h2>\n\n\n\n
Soybean aphids use their piercing-sucking mouthparts to extract plant sap. This causes several kinds of damage, including: leaf puckering, weakened plant growth, early senescence, and reduced pod and seed counts.<\/p>\n\n\n\n
The insect is also a vector of numerous viruses, such as soybean and alfalfa mosaics. Viruses affect grain quality, which downgrades it at the time of sale, consequently causing serious financial losses for the grower.<\/p>\n\n\n\n
That\u2019s not all, the accumulation of sap (honeydew) secreted by the aphid also leads to the formation of a fungus called sooty mold. The affected leaves turn black, limiting photosynthesis, as well as the plant\u2019s growth.<\/p>\n\n\n\n
Yield loss<\/h2>\n\n\n\n
Research conducted in the U.S. at the University of Minnesota offers an estimate of the yield losses caused by the soybean aphid. The estimate is based on a new unit of measure used for calculating the aphid feeding rate, namely the aphid-day.<\/strong><\/p>\n\n\n\n1 aphid-day = 1 aphid feeding for one day.<\/p>\n\n\n\n
10 aphid-days = 1 aphid feeding for 10 days, or 10 aphids feeding for one day.<\/p>\n\n\n\n
Formula for calculating your yield % :<\/strong><\/p>\n\n\n\n(aphid-days x 0.0688\/10,000)<\/p>\n\n\n\n
To compute yield, consider that yield is reduced by 6.88 % for every 10,000 aphid-days accumulated. Thus, 500 aphids per plant, feeding for 20 days, will lead to a yield loss in the order of 7 %.<\/p>\n\n\n\n
These studies have shown that yield loss is dependent on aphid populations, but also on their length of exposure on the plants. For instance, 5 days (200 \u00d7 5) = 1000 (aphid-days) is equivalent to a single day of 1000 aphids \/plant.<\/p>\n\n\n\n
Happy growing!<\/p>\n\n\n\n
Source :<\/strong><\/p>\n\n\n\nD. W. Ragsdale, B. P. McCornack, R. C. Venette, B. D. Potter, I. V. MacRae, E. W. Hodgson, M. E. O\u2019Neal, K. D. Johnson, R. J. O\u2019Neil, C. D. DiFonzo, T. E. Hunt, P. A. Glogoza, and E. M. Cullen Journal of Economic Entomology, 100(4):1258-1267. 2007. Published By: Entomological Society of America DOI: http:\/\/dx.doi.org\/10.1603\/0022-0493(2007)100[1258:ETFSAH]2.0.CO;2 URL: http:\/\/www.bioone.org\/doi\/ full\/10.1603\/0022-0493 %282007 %29100 %5B1258 %3AETFSAH%5D2.0.CO %3B2<\/p>\n","protected":false},"excerpt":{"rendered":"
The Asian soybean aphid was first seen in North America in the state of Wisconsin in 2000. In 2001, it made its official appearance in Qu\u00e9bec, following some severe infestations reported in Ontario. Considered one of the major pests in soybean culture, it is now found in most of our fields in every season! But […]<\/p>\n","protected":false},"author":10,"featured_media":25351,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":""},"categories":[15],"tags":[],"author_meta":{"display_name":"anouk","author_link":"https:\/\/prograin.ca\/ca\/author\/anouk\/"},"featured_img":"https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1-300x200.png","yoast_head":"\n
Soybean Aphid Damage - Prograin - Canada<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/\" \/>\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Soybean Aphid Damage - Prograin - Canada\" \/>\n<meta property=\"og:description\" content=\"The Asian soybean aphid was first seen in North America in the state of Wisconsin in 2000. In 2001, it made its official appearance in Qu\u00e9bec, following some severe infestations reported in Ontario. Considered one of the major pests in soybean culture, it is now found in most of our fields in every season! But […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/\" \/>\n<meta property=\"og:site_name\" content=\"Prograin - Canada\" \/>\n<meta property=\"article:published_time\" content=\"2024-07-08T14:08:27+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-03-31T17:08:31+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1253\" \/>\n\t<meta property=\"og:image:height\" content=\"835\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"anouk\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"anouk\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimation du temps de lecture\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/\"},\"author\":{\"name\":\"anouk\",\"@id\":\"https:\/\/prograin.ca\/ca\/#\/schema\/person\/9918862eb1b8e1b71dfc1e6c7b54fee5\"},\"headline\":\"Soybean Aphid Damage\",\"datePublished\":\"2024-07-08T14:08:27+00:00\",\"dateModified\":\"2025-03-31T17:08:31+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/\"},\"wordCount\":390,\"publisher\":{\"@id\":\"https:\/\/prograin.ca\/ca\/#organization\"},\"inLanguage\":\"fr-CA\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/\",\"url\":\"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/\",\"name\":\"Soybean Aphid Damage - Prograin - Canada\",\"isPartOf\":{\"@id\":\"https:\/\/prograin.ca\/ca\/#website\"},\"datePublished\":\"2024-07-08T14:08:27+00:00\",\"dateModified\":\"2025-03-31T17:08:31+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/#breadcrumb\"},\"inLanguage\":\"fr-CA\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/prograin.ca\/ca\/fr\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Soybean Aphid Damage\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/prograin.ca\/ca\/#website\",\"url\":\"https:\/\/prograin.ca\/ca\/\",\"name\":\"Prograin - Canada\",\"description\":\"Un site utilisant WordPress\",\"publisher\":{\"@id\":\"https:\/\/prograin.ca\/ca\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/prograin.ca\/ca\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"fr-CA\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/prograin.ca\/ca\/#organization\",\"name\":\"Prograin - Canada\",\"url\":\"https:\/\/prograin.ca\/ca\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-CA\",\"@id\":\"https:\/\/prograin.ca\/ca\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2018\/11\/Prograin-logo-1.png\",\"contentUrl\":\"https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2018\/11\/Prograin-logo-1.png\",\"width\":352,\"height\":85,\"caption\":\"Prograin - Canada\"},\"image\":{\"@id\":\"https:\/\/prograin.ca\/ca\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/prograin.ca\/ca\/#\/schema\/person\/9918862eb1b8e1b71dfc1e6c7b54fee5\",\"name\":\"anouk\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-CA\",\"@id\":\"https:\/\/prograin.ca\/ca\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/39180b124b3d327b636aa2c6b5c1474b?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/39180b124b3d327b636aa2c6b5c1474b?s=96&d=mm&r=g\",\"caption\":\"anouk\"},\"url\":\"https:\/\/prograin.ca\/ca\/author\/anouk\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Soybean Aphid Damage - Prograin - Canada","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/","og_locale":"fr_CA","og_type":"article","og_title":"Soybean Aphid Damage - Prograin - Canada","og_description":"The Asian soybean aphid was first seen in North America in the state of Wisconsin in 2000. In 2001, it made its official appearance in Qu\u00e9bec, following some severe infestations reported in Ontario. Considered one of the major pests in soybean culture, it is now found in most of our fields in every season! But […]","og_url":"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/","og_site_name":"Prograin - Canada","article_published_time":"2024-07-08T14:08:27+00:00","article_modified_time":"2025-03-31T17:08:31+00:00","og_image":[{"width":1253,"height":835,"url":"https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1.png","type":"image\/png"}],"author":"anouk","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"anouk","Estimation du temps de lecture":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/#article","isPartOf":{"@id":"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/"},"author":{"name":"anouk","@id":"https:\/\/prograin.ca\/ca\/#\/schema\/person\/9918862eb1b8e1b71dfc1e6c7b54fee5"},"headline":"Soybean Aphid Damage","datePublished":"2024-07-08T14:08:27+00:00","dateModified":"2025-03-31T17:08:31+00:00","mainEntityOfPage":{"@id":"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/"},"wordCount":390,"publisher":{"@id":"https:\/\/prograin.ca\/ca\/#organization"},"inLanguage":"fr-CA"},{"@type":"WebPage","@id":"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/","url":"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/","name":"Soybean Aphid Damage - Prograin - Canada","isPartOf":{"@id":"https:\/\/prograin.ca\/ca\/#website"},"datePublished":"2024-07-08T14:08:27+00:00","dateModified":"2025-03-31T17:08:31+00:00","breadcrumb":{"@id":"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/#breadcrumb"},"inLanguage":"fr-CA","potentialAction":[{"@type":"ReadAction","target":["https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/prograin.ca\/ca\/en\/2024\/07\/08\/soybean-aphid-damage\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/prograin.ca\/ca\/fr\/"},{"@type":"ListItem","position":2,"name":"Soybean Aphid Damage"}]},{"@type":"WebSite","@id":"https:\/\/prograin.ca\/ca\/#website","url":"https:\/\/prograin.ca\/ca\/","name":"Prograin - Canada","description":"Un site utilisant WordPress","publisher":{"@id":"https:\/\/prograin.ca\/ca\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/prograin.ca\/ca\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"fr-CA"},{"@type":"Organization","@id":"https:\/\/prograin.ca\/ca\/#organization","name":"Prograin - Canada","url":"https:\/\/prograin.ca\/ca\/","logo":{"@type":"ImageObject","inLanguage":"fr-CA","@id":"https:\/\/prograin.ca\/ca\/#\/schema\/logo\/image\/","url":"https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2018\/11\/Prograin-logo-1.png","contentUrl":"https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2018\/11\/Prograin-logo-1.png","width":352,"height":85,"caption":"Prograin - Canada"},"image":{"@id":"https:\/\/prograin.ca\/ca\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/prograin.ca\/ca\/#\/schema\/person\/9918862eb1b8e1b71dfc1e6c7b54fee5","name":"anouk","image":{"@type":"ImageObject","inLanguage":"fr-CA","@id":"https:\/\/prograin.ca\/ca\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/39180b124b3d327b636aa2c6b5c1474b?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/39180b124b3d327b636aa2c6b5c1474b?s=96&d=mm&r=g","caption":"anouk"},"url":"https:\/\/prograin.ca\/ca\/author\/anouk\/"}]}},"featured_image_urls":{"full":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1.png",1253,835,false],"thumbnail":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1-150x150.png",150,150,true],"medium":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1-300x200.png",300,200,true],"medium_large":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1-768x512.png",768,512,true],"large":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1.png",1253,835,false],"1536x1536":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1.png",1253,835,false],"2048x2048":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1.png",1253,835,false],"menu-24x24":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1-24x16.png",24,16,true],"menu-36x36":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1-36x24.png",36,24,true],"menu-48x48":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1-48x32.png",48,32,true]},"post_excerpt_stackable":"<p>The Asian soybean aphid was first seen in North America in the state of Wisconsin in 2000. In 2001, it made its official appearance in Qu\u00e9bec, following some severe infestations reported in Ontario. Considered one of the major pests in soybean culture, it is now found in most of our fields in every season! But what are the consequences of its passage for growers? That is what this new article will explore. The damage Soybean aphids use their piercing-sucking mouthparts to extract plant sap. This causes several kinds of damage, including: leaf puckering, weakened plant growth, early senescence, and reduced…<\/p>\n","category_list":"<a href=\"https:\/\/prograin.ca\/ca\/en\/category\/non-classe-en\/\" rel=\"category tag\">Non class\u00e9<\/a>","author_info":{"name":"anouk","url":"https:\/\/prograin.ca\/ca\/author\/anouk\/"},"comments_num":"0 comments","featured_image_urls_v2":{"full":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1.png",1253,835,false],"thumbnail":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1-150x150.png",150,150,true],"medium":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1-300x200.png",300,200,true],"medium_large":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1-768x512.png",768,512,true],"large":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1.png",1253,835,false],"1536x1536":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1.png",1253,835,false],"2048x2048":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1.png",1253,835,false],"menu-24x24":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1-24x16.png",24,16,true],"menu-36x36":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1-36x24.png",36,24,true],"menu-48x48":["https:\/\/prograin.ca\/app\/uploads\/sites\/3\/2023\/03\/Sans-titre-1253-\u00d7-835-px-1-48x32.png",48,32,true]},"post_excerpt_stackable_v2":"<p>The Asian soybean aphid was first seen in North America in the state of Wisconsin in 2000. In 2001, it made its official appearance in Qu\u00e9bec, following some severe infestations reported in Ontario. Considered one of the major pests in soybean culture, it is now found in most of our fields in every season! But what are the consequences of its passage for growers? That is what this new article will explore. The damage Soybean aphids use their piercing-sucking mouthparts to extract plant sap. This causes several kinds of damage, including: leaf puckering, weakened plant growth, early senescence, and reduced…<\/p>\n","category_list_v2":"<a href=\"https:\/\/prograin.ca\/ca\/en\/category\/non-classe-en\/\" rel=\"category tag\">Non class\u00e9<\/a>","author_info_v2":{"name":"anouk","url":"https:\/\/prograin.ca\/ca\/author\/anouk\/"},"comments_num_v2":"0 comments","coauthors":[],"tax_additional":{"categories":{"linked":["<a href=\"https:\/\/prograin.ca\/ca\/en\/category\/non-classe-en\/\" class=\"advgb-post-tax-term\">Non class\u00e9<\/a>"],"unlinked":["<span class=\"advgb-post-tax-term\">Non class\u00e9<\/span>"]}},"comment_count":"0","relative_dates":{"created":"Posted 2 ann\u00e9es ago","modified":"Updated 1 ann\u00e9e ago"},"absolute_dates":{"created":"Posted on 8 juillet 2024","modified":"Updated on 31 mars 2025"},"absolute_dates_time":{"created":"Posted on 8 juillet 2024 14 h 08 min","modified":"Updated on 31 mars 2025 17 h 08 min"},"featured_img_caption":"","series_order":"","_links":{"self":[{"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/posts\/25337"}],"collection":[{"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/comments?post=25337"}],"version-history":[{"count":12,"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/posts\/25337\/revisions"}],"predecessor-version":[{"id":27449,"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/posts\/25337\/revisions\/27449"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/media\/25351"}],"wp:attachment":[{"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/media?parent=25337"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/categories?post=25337"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prograin.ca\/ca\/wp-json\/wp\/v2\/tags?post=25337"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}