Land preparation

Reduces soil erosion
By killing weeds but leaving roots in place, paraquat stabilizes the soil.
Case Study
In the five year Sagip-Lupa project in the Philippines researchers have been collaborating to study approaches to reducing the serious threat to food production and the environment. posed by soil erosion
On the three experimental sites an average of more than 100 tonnes/ha of topsoil has been lost each year by farming in the traditional way. The large savings of precious topsoil from using paraquat and no-till are all statistically significant.
Crop yields have also benefited.
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Increases soil organic matter
Using paraquat in conjunction with less soil tillage helps to preserve organic matter. This is good for soil health and structure, increasing fertility, improving water infiltration and retention, and locking up carbon dioxide.
Case Study
No-till crop production using paraquat for weed control is enabling the successful cultivation of one of China’s last available soil resources for food production.
In Southern China nearly 30 million hectares of red soils have been cultivated, but they are highly weathered, inherently infertile and very susceptible to erosion. Paraquat and no-till can help by stabilizing the soil.
Controls weeds
Paraquat is an important tool for weed management. It controls many species and can be used with most crops. Its mode of action means that it is especially valuable where intensive use of glyphosate has caused, or threatens to cause, the development of glyphosate resistant weeds.
Case Study
The extensive adoption of glyphosate tolerant GM crops has led to farmers over-relying on glyphosate.
Although glyphosate is encouraging the continued adoption of no-till, with all the benefits to soil conservation that brings, up to three million hectares in Brazil are now estimated to be infested with glyphosate resistant weeds.
However, an integrated weed control system involves continuing to spray glyphosate for burndown, but following just before or just after planting the crop with an application of a paraquat-based herbicide.
Read more …
 
 
Acts fast
Paraquat acts fast in all seasons, no matter what the conditions: hot, dry, wet, early season or late. Paraquat is rainfast in 15 - 30 minutes.
Case Study
In West Bengal, India, using paraquat to burndown weeds in a no-till system means farmers can transplant a new rice crop after only four days compared to the usual 12 days. Traditionally, fields are plowed and farmers have to wait for buried weeds to decompose sufficiently to allow a final cultivation.
Articles in this section are about specific examples of how paraquat is being used and new uses explored in sustainable cropping systems.
The case studies show how farmers, their families and their land can benefit by farming with paraquat; and how this enables them to grow better crops.
Use
Paraquat is one of the most widely used herbicides in the world, marketed globally under the brand name Gramoxone by Syngenta. A list of other brand names under which paraquat is sold can be found here.
Paraquat is used in nearly 90 countries either to prepare the land for planting or for controlling weeds in more than 100 crops, including major food crops: corn, rice, soya, wheat, potatoes; major fruits: apples, oranges, bananas; beverages: coffee, tea, cocoa; and processed crops: cotton, oil palm, sugarcane, and rubber.
In this section you can find information about crops for which paraquat is an essential production tool and a selection of case studies illustrating the benefits from using paraquat in some very different cropping systems.
The crop reviews describe the crop, where it is grown and what it is used for; crop production methods and weed, insect pest and disease problems; and the key benefits from using paraquat. They are summarised here and more extensive articles can be found in the Knowledge Bank.
The case studies demonstrate why paraquat is an essential tool for use in sustainable agriculture, and one which many farmers around the world rely upon for their livelihoods and to support their families.

Paraquat has been a valuable tool for farmers all over the world for nearly 50 years. Its speed of action, rainfastness and now its role as a weed resistance fighter are unsurpassed.
However, paraquat’s importance and benefits go beyond simply weed control. Its unique property of being locked onto soil so tightly on contact, and the consequent biological inactivation, mean that it has become a key component in conservation tillage systems, especially no-till.
Paraquat plus reduced tillage improves soil structure and fertility, timeliness of operations, biodiversity and the overall profitability of farming. It is also unique as a non-selective herbicide in being able to be sprayed between the rows of growing crops without fear of crop damage.
In this section you can find out about the specific benefits paraquat brings on the farm, for the environment and in rural communities.
 
Key benefits of paraquat
On the farm For the environment In rural communities Controls weeds
Reduces [no-glossary] soil erosion
Creates opportunities
Acts fast
Increases soil organic matter
What is Paraquat?
Paraquat is a herbicide (chemical weed killer) used to control a very broad range of weeds (unwanted plants) in more than 100 crops, including cereals, oilseeds, fruit and vegetables, growing in all climates. Weeds shade crops, take their water and nutrients, and make harvesting difficult. The leading manufacturer of paraquat is Syngenta, which (as ICI) developed the active ingredient (AI) in the early 1960’s. Since then, paraquat has made possible many innovations in sustainable farming systems, based on its simplification of crop production by effectively controlling weeds and, in doing so, removing the need for ploughing to bury them. This has freed up farmers’ time and also helped care for the soil. Paraquat is one of the most widely used herbicides in the world. It has been approved for use by authorities in nearly 90 countries. When used as recommended, paraquat is effective and safe to users, consumers and the environment.
Key facts about the safe and effective use of paraquat are noted below. This fact sheet also contains a list of referenced scientific papers and other publications and a summary of technical information.
Why Farmers Use Paraquat
Spraying paraquat lets millions of farmers grow better crops more easily, while respecting the environment. Paraquat has a unique set of characteristics: