{"id":79927,"date":"2014-09-01T16:32:27","date_gmt":"2014-09-01T06:32:27","guid":{"rendered":"http:\/\/southburnett.com.au\/news2\/?p=79927"},"modified":"2020-08-25T17:44:18","modified_gmt":"2020-08-25T07:44:18","slug":"ne-glyphosate-resistant-weed-identifed","status":"publish","type":"post","link":"https:\/\/southburnett.com.au\/news2\/2014\/09\/01\/ne-glyphosate-resistant-weed-identifed\/","title":{"rendered":"New Glyphosate-Resistant Weed Identifed"},"content":{"rendered":"

September 1, 2014 <\/strong><\/p>\n

Farmers now have a new enemy in the battle against weeds: glyphosate-resistant Sweet Summer Grass.<\/p>\n

The weed is a major problem in summer and can form dense mats in cultivation. Individual plants can produce up to 6000 seeds and remains of old plants impede winter crop establishment.<\/p>\n

Late in 2013, staff from the Department of Agriculture, Fisheries and Forestry\u2019s CQ Grower Solutions group identified a population of the weed near Emerald that had survived application of glyphosate at label rates.<\/p>\n

When tested for resistance against susceptible plants by NSW DPI the results were very unsettling.<\/p>\n

DAFF Weed Scientist Dr Michael Widderick said that a photograph taken 16 days after treating with glyphosate 450 at 1.6L\/ha showed susceptible plants fully controlled while the suspect plants were green and healthy.<\/p>\n

\u201cThe discovery of this CQ patch is a world first case of Sweet Summer Grass being glyphosate resistant,\u201d Dr Widderick said.
\n<\/strong>
\n\u201cAlthough CQ farmers are already contending with Feather-top Rhodes grass patches that can easily survive 4L\/ha of glyphosate, this is another sign that weed control in this region needs to be more flexible and not so reliant on glyphosate.<\/p>\n

\u201cLike most other cases of glyphosate resistance, this population was sourced from a zero tillage farm. <\/p>\n

\u201cZero till operations are thought to have started on this farm in the mid-1990s, allowing at least 20 years of reliance on glyphosate.\u201d<\/p>\n

DAFF is continuing to work with NSW DPI on this research program with the next step being to determine the level of resistance by undertaking a glyphosate rate response experiment.<\/p>\n

\u201cFor a plant to re-shoot so rapidly within 16 days after application may indicate a moderate to high level of resistance but future investigations should determine how tough these plants are,\u201d Dr Widderick said.<\/p>\n

\u201cIn the meantime, we are urging CQ growers who suspect glyphosate resistant Sweet Summer Grass to collect seed and contact DAFF on 13-25-23 to organise resistance testing on the samples.<\/p>\n

\u201cAdditionally, agronomic advice should be sought to ensure population blow-outs do not occur. Stopping seed set will be the key to achieving this. <\/p>\n

\u201cEffective control is likely to be a combination of applying other effective herbicides and combining that with non-chemical tactics.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"

Farmers now have a new enemy in the battle against weeds: glyphosate-resistant Sweet Summer Grass.<\/p>\n","protected":false},"author":20,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3,36],"tags":[],"yoast_head":"\nNew Glyphosate-Resistant Weed Identifed - southburnett.com.au<\/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:\/\/southburnett.com.au\/news2\/2014\/09\/01\/ne-glyphosate-resistant-weed-identifed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"New Glyphosate-Resistant Weed Identifed - southburnett.com.au\" \/>\n<meta property=\"og:description\" content=\"Farmers now have a new enemy in the battle against weeds: glyphosate-resistant Sweet Summer Grass.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/southburnett.com.au\/news2\/2014\/09\/01\/ne-glyphosate-resistant-weed-identifed\/\" \/>\n<meta property=\"og:site_name\" content=\"southburnett.com.au\" \/>\n<meta property=\"article:published_time\" content=\"2014-09-01T06:32:27+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-08-25T07:44:18+00:00\" \/>\n<meta name=\"author\" content=\"Anne Miller\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Anne Miller\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\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\":\"WebPage\",\"@id\":\"https:\/\/southburnett.com.au\/news2\/2014\/09\/01\/ne-glyphosate-resistant-weed-identifed\/\",\"url\":\"https:\/\/southburnett.com.au\/news2\/2014\/09\/01\/ne-glyphosate-resistant-weed-identifed\/\",\"name\":\"New Glyphosate-Resistant Weed Identifed - 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