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Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Monday, 06 July 2009
The Paraquat Information Center has been completely redeveloped to make it easier to find information, not only about paraquat, but also about the huge variety of cropping systems around the world in which paraquat is one of farmers' most essential tools.
Here is a quick guide to finding your way around.
Use the top navigation bar to browse the main sections of the site:
News & Features contains topical articles about paraquat and how it is being used to increase agricultural...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Tuesday, 19 May 2009
In September 2008, after an evaluation by the Thai Toxicology Evaluation Committee, paraquat was approved for continued sale in Thailand and scheduled to enter the new re-registration process.
As of May 2009, the final approval of the re-registration procedure by the Ministry of Agriculture and Cooperatives is still pending, but paraquat has been included in the first stage of the review program which is expected to start in July 2009.  The current registration will expire in August 2011.
Following a major...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Thursday, 16 April 2009
It takes skill to no-till, but persevering and wider adoption could bring many benefits, says an article on ‘No-Till: the Quiet Revolution’ in a recent edition of Scientific American. 
No-till is a way of growing crops without plowing. The authors, soil and sustainable farming experts David Huggins, USDA, and Prof. John Reganold (Washington State University) cite the introduction of paraquat as a milestone in agriculture which made no-till possible.
As a broad spectrum, non-selective herbicide, paraquat controls...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Wednesday, 18 March 2009
In 2008 the problem of weeds that have become resistant to glyphosate has continued to increase.
New outbreaks have been reported in Australia, Brazil, Paraquay and the USA, including one species previously unrecorded as being resistant1. Urochloa panicoides (liverseedgrass) was found in New South Wales, Australia infesting grain sorghum and wheat crops.
In addition, populations of Chenopodium album (lambsquarters, fat hen) with less than usual sensitivity to glyphosate have been noted in US soybean fields2....
Friday, 27 February 2009
The main manufacturer of paraquat, Syngenta, comments on the status of paraquat in the EU:
In December 2003, following a detailed review and the scientific recommendation of the relevant EU committees, the Commission adopted Directive 2003/112/EC, which included paraquat in Annex I (“EU registration of paraquat”, to be found here in all languages).
In February 2004, however, Sweden initiated legal action before the European Court in Luxembourg requesting that the Court declare Directive 2003/112/EC null and void....
Wednesday, 11 February 2009
Syngenta will not be applying for a new licence for paraquat in the European Union. John Atkin, Chief Operating Officer of Syngenta's crop protection business area, told a media conference in Zurich that the cost would out-weigh the benefits.
The EU Court of Justice's Court of First Instance had handed down a ruling in July 2007 which cancelled the licence granted for paraquat in 2003. Originally, Syngenta had announced that it may submit a new appication for an EU licence within the next two years. "We will not now be doing so for...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Tuesday, 18 November 2008
Paraquat was granted a full re-registration in the Philippines on 22 October 2008 for a further three years.  This followed a full and detailed scientific review by the Fertilizer and Pesticide Authority of the Philippines.  This is excellent news for the country’s 90 million inhabitants for whom agriculture is a very significant part of their economy. 
For 12 million farmers, it means they can continue to use paraquat as an essential tool in their efforts to grow food, make an important contribution to the country...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Tuesday, 01 July 2008
Paraquat has enabled the development of two new production technologies for vegetable farmers in the Philippines: Bilis Saka and Bilis Linis. These techniques are only possible because paraquat’s key characteristics as a herbicide are that it controls almost all weeds, but only by contact action, and is inactivated as soon as it reaches the soil. Bilis Saka is used to establish crops in a weed-free soil without the need to plough and Bilis Linis allows weeds growing between the rows of plants to be controlled without fear of damaging...
Wednesday, 18 June 2008
The FAO/WHO specification scheme is regarded as a benchmark representing a global standard of product quality.
1. The specifications can be applied as a tool in risk assessment to ensure that products on the market meet minimum acceptable quality standards.
2. They offer quality insurance for users and vendors against inferior products.
3. They also provide an important link between biological efficacy and specification requirements.
 FAO and WHO specifications are proposed by manufacturers based on a submitted...
Wednesday, 23 January 2008
Members of the Global Paraquat Community represent leading agricultural and environmental organizations around the world. The Paraquat Information Center is pleased to welcome another industry expert as the newest member of the Global Paraquat Community sponsoring this site.
Professor Antonio Vidal Ribas researches and teaches weed biology and management at the Universidade Federal do Rio Grande do Sul Faculdade de Agronomia in Brazil. His primary focus is on herbicide resistant weeds.
Based on his vast experience, Professor Ribas...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Sunday, 02 December 2007
Activists' efforts to incite food scares were dismissed by experts, who reassured the public about the safety of palm oil in a recent announcement by the Malaysian Palm Oil Association (MPOA).
In an October 13 article, MPOA chairman Datuk Sabri Ahmad was quoted as saying:
"Palm oil has been thoroughly tested for traces of paraquat in oil extracted from oil palm treated with paraquat. At the limit of detection of 0.02 mg/kg, no paraquat residues were found in the oil."
This information is consistent with over 40 years of...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Friday, 30 November 2007

Pesticides are undergoing regular testing as part of the ongoing registration process in many countries.
Part of this testing includes compliance of active substances with new safety standards and other improved scientific requirements.
Formulations containing paraquat have been registered for use in New Zealand since 1962.
A comprehensive assessment and subsequent approval, undertaken by the Environment Risk Management Authority of New Zealand and the Agricultural Chemical and Veterinary Medicine Group of the New...
Saturday, 18 August 2007
Prior to the recent confirmation of glyphosate resistance in awnless barnyard grass (Echinochloa colona) in northern New South Wales (Australia), only annual ryegrass (Lolium rigidum) had been confirmed resistant to glyphosate in Australia.
A report dated 21 June 2007 showed in some tests with barnyard grass seeds and their progeny from a paddock sample from Belatta (NSW), 3 weeks after treatment, an almost total plant kill in non resistant weeds and high survival rates in glyphosate-resistant populations.
Four more weeds have...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Tuesday, 24 July 2007
A variety of plant materials, technically called ‘biomass’, can be processed into biofuels. Biodiesel is the product of vegetable oils derived from soybeans, sunflowers, rapeseed, palm, coconuts, and other more exotic sources such as jatropha seeds. Bioethanol comes from the fermentation of corn, sugar beet and sugar cane, switchgrass, and wheat, as well as other starchy or cellulosic plant material.
Ethanol use far outstrips biodiesel globally, as ethanol has more mature markets and infrastructure. In the U.S., where it is...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Monday, 09 July 2007
By providing the non-selective weed control essential in conservation tillage systems, paraquat is helping to mitigate climate change.
US farmers can now enrol in the Farmers Union Carbon Credit Program which means they will get paid for managing their cropland using conservation tillage systems like no-till and strip-till. Conservation tillage increases the amount of organic matter in the soil, and apart from being good agricultural practice, this sequesters large amounts of carbon dioxide.
Agricultural land has the potential to...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Sunday, 03 June 2007
Over the years in many areas of the United States, certain weeds have become resistant to some herbicides used, most recently to glyphosate since Roundup Ready crops have been grown on an increasing massive scale.
Horseweed / marestail (Conyza canadensis) is native to the United States, but it has recently become much more problematic to control in Roundup Ready soybean production. Horseweed is well adapted to no-till crop production. It has developed resistance to several herbicides including glyphosate. Horseweed was the first...
Monday, 19 March 2007
Through a series of articles, the African Executive explains how use of pesticides in general, and paraquat in particular, give great benefits to African farming communities.
The latest article called Cutting Down Back-Pain in Rural Areas mentions a document from the Paraquat Information Center: Paraquat: A unique contributor to agriculture and development, in which Dr. Prasanna Srinivasan argues, “Herbicides such as Paraquat are important because weeds compete vigorously with crops for water, light and other nutrients. As a...
Saturday, 03 March 2007
The benefits of paraquat to sustainable agriculture are clear and are covered in detail elsewhere on the Paraquat Information Center. Information is also available about the work of companies, such as Syngenta (a leading manufacturer of paraquat), to address the concerns raised by government regulatory authorities and other stakeholders about paraquat and pesticides in general. The registration of paraquat in over 100 countries testifies to the wide consensus among government experts that these potential safety concerns can and are being...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Wednesday, 28 February 2007
Glyphosate resistance was first documented in Australia in 1996 at a site in Victoria. Since then, there have been a number of other sites reporting glyphosate resistance. So far, only annual ryegrass populations had been reported with glyphosate resistance in Australia. The Glyphosate Resistance Register contains information regarding all the known glyphosate-resistant weed populations present in Australia. The register is managed by Dr Chris Preston of the Plant & Food Science department at the University of Adelaide.
In a news...
Wednesday, 17 January 2007
In an article (in Spanish) dated November 18, 2006, the Guatemalan newspaper Prensa Libre explains that intoxication by pesticides can be reduced through appropriate training.
Many growers have had health complaints due to continued usage of pesticides. The Health authorities in Guatemala wanted to know more about this and field monitoring was carried out which showed that a majority of intoxication cases observed were occupational, although some also concerned young people, general use and intentional intoxication (suicide).
...