Did you miss the news about paraquat

News and features about paraquat illustrating its multitude of uses and the benefits it brings to farmers around the world are regularly posted on the Paraquat Information Center website. Here are the highlights from some popular recent articles.

Sugarcane harvest helped by paraquat

In Brazil, paraquat is helping farmers to harvest more sugarcane, more efficiently. The fast and thorough desiccation achieved by paraquat means faster harvesting, more profitable cropping and less environmental impact. A major improvement in the sustainability of sugarcane crop management would be to eliminate burning the crop prior to harvest. With a pre-harvest application of paraquat, all the benefits of green harvesting are retained with significant additions. A desiccated crop means harvesting is faster with less bulk passing through the combine, so saving time and fuel, and reducing emissions. Less leaf trash ends up in the harvested cane which means more room for cane stems and less cleaning needed, so reducing costs. Trials have demonstrated cost savings of between 15% and 19% from using paraquat as a harvest aid. Read more ...

Indonesian rice production increased by paraquat

“Time and tide wait for no man”, so they say. Rice farmers living in coastal areas of South Sumatra, and Central and East Kalimantan in Indonesia know this only too well. Their paddy fields are flooded by river water pushed back up the deltas by each incoming tide. Preparing the land is especially difficult. Only paraquat can act fast enough between tides to kill weeds because it is absorbed by leaves before it can be washed off – in just the same way that it is rainfast in less than half an hour.  By controlling weeds with paraquat the land does not need to be plowed. Two or three days later rice seedlings can be transplanted. Ultimately, tidal rice farmers using paraquat can triple their income. Paraquat has enabled rice productivity in the coastal areas of Indonesia to increase substantially, contributing to the country’s success in feeding its fast growing population. Read more ...

Paraquat and new spray hood fight superweeds

Paraquat is in the front-line of US cotton growers’ defenses against glyphosate resistant Palmer amaranth, often described as a ‘superweed’.  This season an advanced design spray hood will enable weeds up to four feet tall (120 cm) to be controlled by paraquat, while shielding late growth-stage cotton from any leaf scorching. Ideally, Palmer amaranth needs to be removed early because even quite small plants will compete with the crop and reduce yield. If rogue plants are allowed to mature and set seed, every one of them can release around half a million seeds, each potentially another glyphosate resistant weed


The inherited ability of a plant/weed to survive a dose of a herbicide normally lethal to that species.

Authoritative On-line References and Resources

http://www.weedscience.org/in.asp The International Survey of Herbicide Resistant Weeds monitors the evolution of resistant species and assesses their impact. All confirmed instances of new cases are listed.
. Over the past couple of seasons, farmers in many southern US states have had to resort to using hoes and machetes to attack infestations of palmer pigweed no longer controlled by glyphosate. Using paraquat and the new spray hood, with the option of adding diuron for large weeds, will provide a much better solution.
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Focus on paraquat in Mexico

Mexico plays a pivotal role in global food security despite most Mexican farmers being smallholders. Not only is agriculture an important sector in the country’s economy, but also Mexico is home to CIMMYT, one of the world’s leading agricultural research centers and the place where the crop production ‘Green Revolution’ of the 1960s and 1970’s began. Paraquat is a valuable tool for Mexican farmers, enabling reduced tillage systems and inter-row weed control, especially in corn, the most widely grown crop. CIMMYT also has a worldwide program on conservation agriculture. This involves developing agronomic practices to reduce tillage, retain adequate coverage of soil with vegetation and harvest waste, and to introduce diversified crop rotations to prevent erosion and improve soil quality. Non-selective


A chemical product used for eliminating all types of weeds (annual and perennial grasses and broadleaved weeds).

Authoritative On-line References and Resources

http://www.weeds.iastate.edu/ An invaluable source of contemporary information about herbicides and weeds from Iowa State University.
herbicides like paraquat are important tools for farmers practising conservation agriculture because weeds need to be controlled without the use of the plow. Where glyphosate is used for weed control, it is important to use paraquat as an alternative in integrated weed management


A decision support system for crop protection which focuses on long-term prevention or suppression of pest problems with minimum impact on human health, the environment, and non-target organisms. IPM takes into consideration all available pest control techniques and tactics (cultural, mechanical, biological, chemical). IPM emphasizes the growth of healthy crops for better productivity with the least possible disruption to agroecosystems.

Authoritative On-line References and Resources

http://www.ipmcenters.org "The USDA's National Site for the Regional IPM Centers' Information System provides information about US commodities, pests and pest management practices, people and issues."
(IWM) systems that will reduce the likelihood of weeds becoming resistant to glyphosate. Reduced tillage systems, such as no-till, lead to benefits including reduced water use, lower energy inputs and emissions, and lower labor requirements and costs.
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