Archives

Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Monday, 14 May 2012
Using paraquat for weed control in oil palm plantations can address a number of the criteria for sustainability defined by the Roundtable on Sustainable Palm Oil (RSPO). These include protecting soil and water quality, and reducing erosion. As part of a wider approach, smallholders undergoing RSPO certification are being shown how to grow more profitable crops while using all inputs more effectively and safely.
Worldwide, 33% of palm oil is produced from crops grown by smallholders. In Thailand, however, smallholders supply 70% of...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Thursday, 26 April 2012
Paraquat’s distinctive behaviour in soil means that farmers around the world confidently use it to protect their crops. Paraquat provides fast broad-spectrum weed control only through foliar contact action. There is no crop damage via the roots or any effect on seed germination. Soil fauna and microorganisms are not affected and there is no leaching or run-off from the degrading paraquat residues reaching the soil.
A new in-depth feature article added to the Knowledge Bank explains the fate of paraquat in soil and what the...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Wednesday, 22 February 2012
Paraquat’s famous fast speed of action has been captured by a time-lapse video produced by Ohio State University, USA. No herbicide acts faster than paraquat and across such a broad spectrum of weed species too. Fast action gives farmers important benefits including opportunities for higher yields and better prices through earlier planting; rainfastness within 15-30 minutes; and ease of seeing where weeds have been treated after a break in spraying operations.
Ohio State University chose giant ragweed (Ambrosia trifida) as the...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Wednesday, 25 January 2012
Cotton is one of the world’s major crops and particularly important to the economies of many developing countries. Cotton itself is a fibre which protects the seed of the cotton plant, much as the flesh of an apple protects the pips. So, fruit are not only for eating. The crop has been at the forefront of the revolution in biotechnology, being the second genetically modified (GM) crop to be introduced in broadacre agriculture after soybeans in 1997.
One of the main traits in GM cotton is tolerance to applications of the non-...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Tuesday, 20 December 2011
US crop scientists are excited about the potential to protect soil in fields where corn is grown for biofuel production by the use of perennial cover crops suppressed by paraquat.
In the near future, the food versus fuel dilemma will be addressed by using ‘waste’ crop residues instead of grain as the feedstock for bioethanol. However, the concern is that removal of stover and chaff normally returned to the soil will cause serious erosion and fertility problems.
Iowa State University has conducted a three-year project...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Wednesday, 16 November 2011
The introduction of glyphosate tolerant (GT) crops has been the one of the most significant technological changes in agriculture, along with mechanization and hybrid seed breeding. Farmers around the world are reaping the benefits of a simplified weed control system, saving costs, time and labor and increasing operational flexibility. Adoption has been rapid, particularly in the Americas. In the most important soybean growing US states, Brazil and Argentina around 90% of crops are GT. Globally 148 million ha were sown to GM crops across...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Monday, 10 October 2011
Farmers in southwest China are adopting no-till maize production using paraquat for weed control. A large proportion of crops in the region are grown by smallholder farmers on hillside fields. Soil erosion and loss of fertility are serious problems. The traditional methods of hand and mechanical weed control have very high labor demands and often cannot be done in a timely manner to achieve the best yields. Recognizing these issues, a project was set-up to teach farmers and extension workers how to grow no-...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Monday, 26 September 2011
Rice is the staple food for more than half the world. In Asia alone, more than two billion people obtain over 60% of their calories from rice. In developing countries nearly one billion people find employment associated with rice in the food chain. It is the most rapidly growing source of food in Africa and is critical to food security.
Protecting rice from weeds, pests and diseases is essential to avoiding heavy losses in yield. Weed control is usually most important. Paraquat is used to prepare the land for cultivating rice and on...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Wednesday, 24 August 2011
An assessment of the benefits of training Thai farmers in the safe use of crop protection products such as paraquat has shown that good product stewardship clearly has positive effects on the care farmers take in storage, handling and spraying.
The survey conducted by Kasetsart University also revealed the rich diversity of crops grown in western Thailand.
The training was conducted as part of a wider project, ‘The Safe and Sustainable Production of Horticultural Crops’, aimed at improving the quality of vegetable...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Tuesday, 02 August 2011
Controlling weeds in potatoes is a problem for many farmers. Paraquat is a very useful herbicide for potatoes because it can be used to burndown weeds from before planting right up to the point at which the potato sprouts start to emerge from the soil1. This allows for weed control measures to be tailored to the weeds present. As potatoes may take up to four weeks to emerge, significant weed growth may have occurred after planting. Weeds can quickly overrun potato crops if they are allowed to grow unchecked before the crop leaf...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Monday, 11 July 2011
Tea is a thriving crop in Vietnam and farmers rely on paraquat for a weed control system that reduces soil erosion.  Much of the tea crop is grown on sloping land prone to losing very significant amounts of soil each year.
Results of research conducted by the Northern Mountainous Agriculture and Forestry Science Institute show that using paraquat for weed control instead of hand hoeing can save huge amounts of soil. Paraquat is more effective than glyphosate because it leaves roots intact to anchor the soil.
Tea in Vietnam...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Saturday, 18 June 2011
Oil palm is the world’s leading vegetable oil crop. As a foodstuff, palm oil is believed to have several important benefits, particularly in lowering the risk of heart disease. As a very high yielding crop, it has become a major feedstock for biodiesel production. The Roundtable on Sustainable Palm Oil has been established to ensure that as production rises environmental issues such as biodiversity and soil erosion are addressed. Integrated pest management (IPM) approaches are widely used and ensure that crops are protected in a...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Monday, 23 May 2011
Paraquat has always played a pivotal role in the development of no-till cropping systems in Brazil, as elsewhere. Not only has no-till helped to propel Brazil to the status of an agricultural ‘superpower’, but it has also brought many sustainable benefits by improving soils and reducing erosion, increasing biodiversity, reducing energy use and improving profitability. More recently, the contribution no-till farming can make to fighting climate change has been recognized. No-till soils sequester carbon as organic matter and...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Thursday, 28 April 2011
Paraquat has been found to be an effective ‘fire fighting’ treatment for large glyphosate resistant Palmer amaranth, sometimes called a ‘superweed’. Researchers at the University of Georgia, USA, have found that applying paraquat through weed wipers and similar implements can very effectively kill Palmer amaranth plants up to 5ft (1.50 m) tall1. While paraquat is very effective on smaller weeds, glyphosate’s systemic action generally makes it a better option on large weeds. However, where there are...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Friday, 08 April 2011
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. The hood has been designed for use at all growth-stages up until ‘layby’ (when the rows close).
Externally the hood is streamlined to glide easily between cotton rows without...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Thursday, 24 March 2011
Citrus are a varied and versatile family of fruit. Oranges are the most widely grown and eaten fresh or juiced, but the smaller, easy to peel, tangerines, mandarins, clementines and satsumas have become more popular in recent years. However, there are many other citrus which collectively are the number one fruit in international trade. Besides lemons, limes and grapefruit, try calamondins, citrons, pomelos or ugli fruit sometime.
In tree crops such as citrus, emphasis should be on the management of weeds rather than their permanent...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Thursday, 03 March 2011
The UN Food and Agriculture Organisation (FAO) has begun to implement its strategy for Sustainable Crop Production Intensification (SCPI). By 2050, FAO estimates that to feed each person on the planet there will only be 0.16 ha of agricultural land available, compared 0.26 ha in 1999 and 0.4 ha in 1960, hence the need to intensify production. The goal of SCPI is to support countries and their farmers to grow more food and the focus will be on developing technologies and policies that will ensure sustainability1,2.
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Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Monday, 14 February 2011
Malaysian agriculture has had a wake-up call to the threat posed by herbicide resistant weeds. Paraquat has an essential role to play in avoiding this potentially huge problem. A report by the Paraquat Information Center of the discovery of populations the noxious weed goosegrass (Eleusine indica) resistant to the non-selective herbicide glufosinate has now been confirmed by publication in a scientific journal1.
A vegetable farmer in Malacca state and planters at an oil palm nursery in Pahang state had suspected that...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Tuesday, 18 January 2011
Lower costs and favorable environmental effects when using paraquat: these were the key conclusions from a four-year comparison of weed control methods in bananas, recently completed by the University of the Philippines.
The trial was conducted on a commercial plantation on Mindanao, the large southern island of the country. Bananas make a significant contribution to the economy of the Philippines being a major fruit export. New plantations are being established on more sloping land where soil erosion poses a real threat to...
Paraquat herbicide for non-selective weed control in no-till and other sustainable agriculture systems
Monday, 20 December 2010
Paraquat has been one of the world’s most widely used herbicides since 1962, but over all that time and all those acres of crop and non-crop land, relatively few cases of resistant weeds have been recorded.
The recognised authority for recording all outbreaks of weed resistance (www.weedscience.org) currently states that there are 25 weed species with a total of 43 different paraquat resistant biotypes in 13 countries. These figures include the recent...