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For 360 grams per litre (0.013 lb/cu in) formulations, European regulations allow applications of up to 12 litres per hectare (1.1 imp gal/acre) for control of perennial weeds such as couch grass. More commonly, rates of 3 litres per hectare (0.27 imp gal/acre) are practiced for control of annual weeds between crops.
Application rates fell from 1,000–2,500 grams of active ingredient per hectare (g/ha) in the 1950s to 40–100 g/ha in the 2000s. [15] Despite this, amounts used have increased. In high income countries over 20 years between the 1990s and 2010s amounts used increased 20%, while in the low income countries amounts increased 1623%.
The glyphosate-based herbicide RoundUp (styled: Roundup) was developed in the 1970s by Monsanto. Glyphosate was first registered for use in the U.S. in 1974. [4] Glyphosate-based herbicides were initially used in a similar way to paraquat and diquat, as non-selective herbicides. Attempts were made to apply them to row crops, but problems with ...
Resistance increases pesticide costs. For southern cotton, herbicide costs climbed from between $50–$75 per hectare ($20–$30/acre) a few years ago to about $370 per hectare ($150/acre) in 2014. In the South, resistance contributed to the shift that reduced cotton planting by 70% in Arkansas and 60% in Tennessee.
It is most commonly available as microgranules containing 15% active ingredients (AI), or emulsifiable concentrate containing 480 g/ litre of AI. Homologuation in Europe requires a maximum dose of 2,400 g per hectare of AI, or 5 litres/hectare of emulsifiable concentrate or 17 kg/ha of microgranules.
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The product is typically used at application rates of 10 g a.i. per hectare, often in combination with other herbicides such as paraquat and glyphosate in direct drilling of cereals and canola. [ 9 ] Human safety
It’s just after 5 a.m. on a Monday in November. Fischer, a 31-year-old construction worker, has to get from his home on the outskirts of Rapid City, South Dakota, to Fort Collins, Colorado — some 350 miles away — and he has to get there by noon. He’s wearing a Kangol hat, jeans, a T-shirt and, for warmth, a hoodie and a jacket.