{"id":11776,"date":"2013-09-03T00:19:34","date_gmt":"2013-09-03T04:19:34","guid":{"rendered":"https:\/\/www.beyondpesticides.org\/dailynewsblog\/?p=11776"},"modified":"2013-09-03T15:57:25","modified_gmt":"2013-09-03T19:57:25","slug":"another-study-finds-rootworms-resistant-to-genetically-engineered-corn","status":"publish","type":"post","link":"https:\/\/beyondpesticides.org\/dailynewsblog\/2013\/09\/another-study-finds-rootworms-resistant-to-genetically-engineered-corn\/","title":{"rendered":"Another Study Finds Rootworms Resistant to Genetically Engineered Corn"},"content":{"rendered":"<p>(<i>Beyond Pesticides,<\/i> September 3, 2013<i>) <\/i>For the past several years,<i> c<\/i>orn rootworms \u00a0have \u00a0been widely reported to exhibit resistance \u00a0to<em> c<\/em>orn genetically engineered (GE) with the <a href=\"https:\/\/www.beyondpesticides.org\/pesticides\/factsheets\/Bt.pdf\"><i>Bacillus thuringiensis<\/i><\/a> (Bt) toxin<i>. <\/i>A \u00a0new report by \u00a0University of Illinois researchers found the resistant corn rootworm \u00a0in two of the state\u2019s counties significantly damaged by western corn rootworm. The increasing lack of efficacy of GE corn, developed with the claim that it \u00a0is specifically designed to protect corn from rootworm, calls into question the efforts of agrichemical companies to patent new forms of GE crops.<\/p>\n<p><a href=\"https:\/\/www.beyondpesticides.org\/dailynewsblog\/wp-content\/uploads\/2013\/09\/cornplants.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright\" style=\"float: right; margin: 7px;\" alt=\"cornplants\" src=\"https:\/\/www.beyondpesticides.org\/dailynewsblog\/wp-content\/uploads\/2013\/09\/cornplants.jpg\" width=\"170\" height=\"256\" \/><\/a><a href=\"http:\/\/bulletin.ipm.illinois.edu\/?cat=1\">The report<\/a> by Joe Spencer, PhD, and Michael Gray, PhD, \u00a0identifies significant damage from western corn rootworms in farm field that were planted with GE corn that contain a Bt protein referred to as \u201cCry3Bb1,\u201d which has been inserted into nearly one-third of the corn planted in the <a href=\"https:\/\/www.beyondpesticides.org\/dailynewsblog\/?p=6408\">United States<\/a>. This version of Bt corn was introduced by Monsanto in 2003, and was touted as a way to reduce insecticide use against rootworm pests. Evidence was gathered in two Illinois counties, Livingston and Kankakee, after fields that had severe root pruning and lodging were brought to the attention of Drs. Spencer and Gray. Dr. Gray was quoted in a <i>Reuters<\/i> article stating,&#8221;Farmers across \u201d\u02dca wide swath of Illinois\u2019 could face formidable challenges protecting corn crops.\u201d<\/p>\n<p>Even more problematic is that western corn rootworms also appear to be resistant to crop rotation. The crop damage was found in fields where the GE corn had been planted in a rotation following soybeans. Rootworms were also collected in the adjacent soybean fields. The report found the number of adult rootworm beetles in the soybean field was reminiscent of densities in the late 1990&#8217;s and early 2000&#8217;s. According to Dr. Spencer, \u201cIt looked like continuous corn and use of the same trait year after year is what produced resistant beetles. Growers thought their get-out-of-jail-free card was just to rotate to soybeans. But what we&#8217;re seeing in northeast and east-central Illinois are beetles that are also resistant to crop rotation.\u201d<\/p>\n<p><a href=\"http:\/\/extension.entm.purdue.edu\/fieldcropsipm\/insects\/corn-rootworms.php\">Western corn rootworm<\/a>, along with northern corn rootworm, are the two species of rootworm that may cause severe damage to corn as both larvae and adults. Southern corn rootworms can cause damage to corn leaves, but because they cannot overwinter in most areas of the Midwest their larvae do not pose a major threat to Midwestern corn production. Western corn rootworms deposit their eggs in the soil from midsummer to autumn and the eggs begin hatching in late May and early June. Western corn rootworm larvae feed on the roots of corn plants, inhibiting the plant\u2019s ability to absorb moisture and nutrients, while opening a pathway for attack from soil-borne pathogens. The agricultural chemicals <a href=\"http:\/\/beyondpesticides.org\/pesticides\/factsheets\/Synthetic%20Pyrethroids.pdf\">bifenthrin<\/a>, <a href=\"http:\/\/beyondpesticides.org\/pesticides\/factsheets\/Carbaryl.pdf\">carbaryl<\/a>,<a href=\"http:\/\/beyondpesticides.org\/pesticides\/factsheets\/Chlorpyrifos.pdf\"> chlorpyrifos<\/a>, <a href=\"http:\/\/beyondpesticides.org\/pesticides\/factsheets\/cyfluthrin.pdf\">cyfluthrin<\/a>, and deltamethrin are commonly used insecticides to control for western corn rootworm. As western corn rootworms have become resistant to Bt corn, farmers have begun to <a href=\"https:\/\/www.beyondpesticides.org\/dailynewsblog\/?p=10631\">rely more heavily<\/a> on chemical methods.<\/p>\n<p>Corn rootworm resistance to Bt corn has been widely reported for the past several years. <a href=\"https:\/\/www.beyondpesticides.org\/dailynewsblog\/?p=9245\">A January 17, 2013 <\/a> \u00a0release from the Environmental Protection Agency (EPA) concluded that \u201ccorn rootworm may not be completely controlled by Cry3Bb1 in certain parts of the corn belt.\u201d In 2011, entomologists at Iowa State University \u00a0<a href=\"http:\/\/www.plosone.org\/article\/info:doi%2F10.1371%2Fjournal.pone.0022629\">published a study<\/a> \u00a0verifying the first field-evolved resistance of corn rootworm to a Bt toxin. The researchers documented resistance to the Bt toxin Cry3Bb1. The study found the western rootworm\u2019s ability to adapt was strongest in fields where Bt corn was planted for three consecutive years and suggested that insufficient planting of refuges may have contributed to the resistance. This study was cited by a group of <a href=\"https:\/\/www.beyondpesticides.org\/dailynewsblog\/?p=7095\">22 prominent entomologists <\/a>who submitted<a href=\"http:\/\/www.regulations.gov\/#!documentDetail;D=EPA-HQ-OPP-2011-0922-0013\"> formal comments to the EPA<\/a> on their concerns of the viability of Cry3Bb1 corn. <a href=\"http:\/\/www.amjbot.org\/content\/99\/4\/700.full\">Recent research<\/a> also shows that the cultivation of Bt corn has negative impacts on beneficial soil life.<\/p>\n<p>In their report, Drs. Gray and Spencer recommend that, \u201cProducers in the most severely affected areas (central and east central) of Illinois should consider the use of pyramided Bt hybrids (hybrids expressing more than one rootworm Cry protein) in 2014.\u201d However, pyramided or stacked GE corn varieties have also been \u00a0<a href=\"https:\/\/www.beyondpesticides.org\/dailynewsblog\/?p=10170\">shown to be ineffective<\/a>. A University of Arizona College of Agriculture and Life Sciences study, <a href=\"http:\/\/www.pnas.org\/content\/early\/2013\/03\/22\/1216719110.abstract\"> published in the Journal<i> PNAS<\/i><\/a>, found that insects that were bred to be resistant to one form of Bt toxin were often cross-resistant to other forms of Bt toxin.<\/p>\n<p>As insects and <a href=\"https:\/\/www.beyondpesticides.org\/dailynewsblog\/?p=8239\">weeds become resistant<\/a> to GE crops and the herbicides the crops are engineered to \u00a0resist, agrichemical companies are working to introduce a <a href=\"https:\/\/www.beyondpesticides.org\/dailynewsblog\/?p=6277\">new generation of GE crops<\/a>. The \u00a0<a href=\"http:\/\/www.stltoday.com\/business\/local\/article_0d67a8bb-57b0-585b-9acb-9d924165255e.html\"><i>St. Louis Pots-Dispatch<\/i><\/a> \u00a0reported in 2012 on progress that multinational chemical corporations Dow AgroSciences, BASF, and Monsanto are making to bring multi-herbicide resistant varieties to market. Under separate arrangements with each company, Monsanto adds glyphosate resistance to seeds that are simultaneously engineered to resist other herbicides. In October 2012, Dow AgroSciences obtained a \u00a0<a href=\"http:\/\/www.businesswire.com\/news\/home\/20111004005223\/en\/Dow-AgroSciences-Receives-Key-International-Patent-Publication\">global patent<\/a> \u00a0on its Enlist Duo technology, which packages an herbicide containing <a href=\"https:\/\/www.beyondpesticides.org\/gateway\/?pesticideid=1\">2, 4-D<\/a> and <a href=\"https:\/\/www.beyondpesticides.org\/gateway\/?pesticideid=37\">glyphosate<\/a> with seeds engineered to tolerate both materials. Monsanto has also been partnering with BASF on \u00a0<a href=\"https:\/\/www.beyondpesticides.org\/gateway\/pesticide\/dicamba.htm\">dicamba<\/a> \u00a0and glyphosate tolerant crop varieties since 2009 with a focus on soybeans, cotton, and corn.<\/p>\n<p>The report by Drs. Gray and Spencer, though important for showing increased rootworm resistance to Bt corn, makes unsustainable recommendations to farmers that they use pyramided Bt hybrids or \u201cplanting-time soil insecticides\u201d to reduce western corn rootworm in 2014. A sustainable solution to rootworm resistance is the transition to organic agriculture. <a href=\"https:\/\/www.beyondpesticides.org\/organicfood\/index.php\">Organic agriculture<\/a> is an ecologically-based management system that prioritizes cultural, biological, and mechanical production practices and natural inputs by strengthening on-farm resources, such as soil fertility, pasture and biodiversity. \u00a0For more reasons to support organic agriculture, visit Beyond Pesticides\u2019 <a href=\"https:\/\/www.beyondpesticides.org\/organicfood\/health\/index.php\">Why Organic<\/a> page.<\/p>\n<p><em>Source: <\/em><a href=\"http:\/\/www.reuters.com\/article\/2013\/08\/28\/usa-gmo-corn-rootworm-idUSL2N0GT1NV20130828\"><i>Reuters<\/i><\/a><em><\/em><\/p>\n<p><em>All unattributed positions and opinions in this piece are those of Beyond Pesticides.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>(Beyond Pesticides, September 3, 2013) For the past several years, corn rootworms \u00a0have \u00a0been widely reported to exhibit resistance \u00a0to corn genetically engineered (GE) with the Bacillus thuringiensis (Bt) toxin. A \u00a0new report by \u00a0University of Illinois researchers found the resistant corn rootworm \u00a0in two of the state\u2019s counties significantly damaged by western corn rootworm. The increasing lack of efficacy of GE corn, developed with the claim that it \u00a0is specifically designed to protect corn from rootworm, calls into question the efforts of agrichemical companies to patent new forms of GE crops. The report by Joe Spencer, PhD, and Michael Gray, PhD, \u00a0identifies significant damage from western corn rootworms in farm field that were planted with GE corn that contain a Bt protein referred to as \u201cCry3Bb1,\u201d which has been inserted into nearly one-third of the corn planted in the United States. This version of Bt corn was introduced by Monsanto in 2003, and was touted as a way to reduce insecticide use against rootworm pests. Evidence was gathered in two Illinois counties, Livingston and Kankakee, after fields that had severe root pruning and lodging were brought to the attention of Drs. Spencer and Gray. Dr. Gray was quoted in [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[249,18,21,319,25,5,270,68,24,120,19],"tags":[],"class_list":["post-11776","post","type-post","status-publish","format-standard","hentry","category-agriculture","category-bt","category-chemicals","category-corn-rootworm","category-corporations","category-genetic-engineering","category-indiana","category-monsanto","category-pests","category-resistance","category-statelocal"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Another Study Finds Rootworms Resistant to Genetically Engineered Corn - Beyond Pesticides Daily News Blog<\/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:\/\/beyondpesticides.org\/dailynewsblog\/2013\/09\/another-study-finds-rootworms-resistant-to-genetically-engineered-corn\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Another Study Finds Rootworms Resistant to Genetically Engineered Corn - Beyond Pesticides Daily News Blog\" \/>\n<meta property=\"og:description\" content=\"(Beyond Pesticides, September 3, 2013) For the past several years, corn rootworms \u00a0have \u00a0been widely reported to exhibit resistance \u00a0to corn genetically engineered (GE) with the Bacillus thuringiensis (Bt) toxin. A \u00a0new report by \u00a0University of Illinois researchers found the resistant corn rootworm \u00a0in two of the state\u2019s counties significantly damaged by western corn rootworm. The increasing lack of efficacy of GE corn, developed with the claim that it \u00a0is specifically designed to protect corn from rootworm, calls into question the efforts of agrichemical companies to patent new forms of GE crops. The report by Joe Spencer, PhD, and Michael Gray, PhD, \u00a0identifies significant damage from western corn rootworms in farm field that were planted with GE corn that contain a Bt protein referred to as \u201cCry3Bb1,\u201d which has been inserted into nearly one-third of the corn planted in the United States. This version of Bt corn was introduced by Monsanto in 2003, and was touted as a way to reduce insecticide use against rootworm pests. Evidence was gathered in two Illinois counties, Livingston and Kankakee, after fields that had severe root pruning and lodging were brought to the attention of Drs. Spencer and Gray. Dr. Gray was quoted in [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/beyondpesticides.org\/dailynewsblog\/2013\/09\/another-study-finds-rootworms-resistant-to-genetically-engineered-corn\/\" \/>\n<meta property=\"og:site_name\" content=\"Beyond Pesticides Daily News Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/beyondpesticides\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/beyondpesticides\/\" \/>\n<meta property=\"article:published_time\" content=\"2013-09-03T04:19:34+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2013-09-03T19:57:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.beyondpesticides.org\/dailynewsblog\/wp-content\/uploads\/2013\/09\/cornplants.jpg\" \/>\n<meta name=\"author\" content=\"Beyond Pesticides\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@ByondPesticides\" \/>\n<meta name=\"twitter:site\" content=\"@ByondPesticides\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Beyond Pesticides\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2013\/09\/another-study-finds-rootworms-resistant-to-genetically-engineered-corn\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2013\/09\/another-study-finds-rootworms-resistant-to-genetically-engineered-corn\/\"},\"author\":{\"name\":\"Beyond Pesticides\",\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/#\/schema\/person\/1b5c0a0981b549cc5b628770073031f4\"},\"headline\":\"Another Study Finds Rootworms Resistant to Genetically Engineered Corn\",\"datePublished\":\"2013-09-03T04:19:34+00:00\",\"dateModified\":\"2013-09-03T19:57:25+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2013\/09\/another-study-finds-rootworms-resistant-to-genetically-engineered-corn\/\"},\"wordCount\":979,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/#organization\"},\"image\":{\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2013\/09\/another-study-finds-rootworms-resistant-to-genetically-engineered-corn\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.beyondpesticides.org\/dailynewsblog\/wp-content\/uploads\/2013\/09\/cornplants.jpg\",\"articleSection\":[\"Agriculture\",\"Bt\",\"Chemicals\",\"corn rootworm\",\"Corporations\",\"Genetic Engineering\",\"Indiana\",\"Monsanto\",\"Pests\",\"Resistance\",\"State\/Local\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/beyondpesticides.org\/dailynewsblog\/2013\/09\/another-study-finds-rootworms-resistant-to-genetically-engineered-corn\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2013\/09\/another-study-finds-rootworms-resistant-to-genetically-engineered-corn\/\",\"url\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2013\/09\/another-study-finds-rootworms-resistant-to-genetically-engineered-corn\/\",\"name\":\"Another Study Finds Rootworms Resistant to Genetically Engineered Corn - 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The founders, who established Beyond Pesticides (originally as National Coalition Against the Misuse of Pesticides) as a nonprofit membership organization in 1981, felt that without the existence of such an organized, national network, local, state and national pesticide policy would become, under chemical industry pressure, increasingly unresponsive to public health and environmental concerns. Beyond Pesticides believes that people must have a voice in decisions that affect them directly. We believe decisions should not be made for us by chemical companies or by decision-makers who either do not have all of the facts or refuse to consider them. Learn more about our work, read A Year in Review\u20142021, our accomplishments are your victories! Beyond Pesticides seeks to protect healthy air, water, land, and food for ourselves and future generations. By forging ties with governments, nonprofits, and people who rely on these natural resources, we reduce the need for unnecessary pesticide use and protect public health and the environment. Beyond Pesticides provides hands-on services to the public and supports local action by: identifying and interpreting hazards; and, designing safe pest management programs. With the information provided by Beyond Pesticides, people may not only be able to make informed choices and adopt practices that protect themselves and their families from unnecessary exposure to pesticides, but they will be able to effect changes on community-wide pest management decisions and policies that govern pesticide use, such as pesticide uses in parks, schools, for community insect control and along roadsides. 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A \u00a0new report by \u00a0University of Illinois researchers found the resistant corn rootworm \u00a0in two of the state\u2019s counties significantly damaged by western corn rootworm. The increasing lack of efficacy of GE corn, developed with the claim that it \u00a0is specifically designed to protect corn from rootworm, calls into question the efforts of agrichemical companies to patent new forms of GE crops. The report by Joe Spencer, PhD, and Michael Gray, PhD, \u00a0identifies significant damage from western corn rootworms in farm field that were planted with GE corn that contain a Bt protein referred to as \u201cCry3Bb1,\u201d which has been inserted into nearly one-third of the corn planted in the United States. This version of Bt corn was introduced by Monsanto in 2003, and was touted as a way to reduce insecticide use against rootworm pests. Evidence was gathered in two Illinois counties, Livingston and Kankakee, after fields that had severe root pruning and lodging were brought to the attention of Drs. Spencer and Gray. 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By forging ties with governments, nonprofits, and people who rely on these natural resources, we reduce the need for unnecessary pesticide use and protect public health and the environment. Beyond Pesticides provides hands-on services to the public and supports local action by: identifying and interpreting hazards; and, designing safe pest management programs. With the information provided by Beyond Pesticides, people may not only be able to make informed choices and adopt practices that protect themselves and their families from unnecessary exposure to pesticides, but they will be able to effect changes on community-wide pest management decisions and policies that govern pesticide use, such as pesticide uses in parks, schools, for community insect control and along roadsides. 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