St. Louis-based Monsanto maintains the resistance is frequently overstated, noting that a lot of weeds present no indication of defense. "We think that glyphosate will continue to be an important tool inside the farmers' arsenal," Monsanto spokesperson John Combest stated. The corporation has started paying cotton farmers $12 an acre to cover the price of other herbicides to work with along with Roundup to enhance its usefulness. The trend has confirmed some food safety groups' notion that biotechnology won't lessen the use of chemicals over time.
"That's being reversed," said Bill Freese, a chemist with the Washington, D.C.-based Center For Food Safety, which endorses organic farming. "They are going to significantly maximize utilization of those chemicals, and that's bad news." The first weeds inside the U.S. which lived through Roundup were discovered about 10 years ago in Delaware. Farming experts said the usage of other chemicals has already been sneaking up. Monsanto and other companies are developing new seeds designed to withstand older herbicides such as dicamba and 2,4-D, a weed killer formulated in the second world war and an element in Agent Orange, that was used to destroy rainforest foliage in the course of the Vietnam War and is blamed for health issues among veterans.
Dicamba and 2,4-D both easily flow past the places that they are dispersed, making them a menace to nearby vegetation and wild plants, Mortensen said. That, in turn, may also threaten wildlife. "We're discovering that the (wild) crops which grow on the field edges actually support beneficial insects, just like bees," he stated. In Australia, weed scientist Stephen Powles is a kind of evangelist for preserving Roundup, calling it a near-miraculous farming tool.
Australia has been dealing with Roundup-resistant weeds since the mid 1990s, but modifications in farming practices have helped ensure that it stays efficient, Powers said. That has included using a wider selection of herbicides to get rid of Roundup resistant weeds and employing other methods of weed control. Those alternate methods, such as planting so-called cover crops like rye to hold back weeds throughout the winter as well as other instances when fields are not grown with corn, soybeans or cotton, would be the key, said Freese, the Center For Food Safety chemist. Or else, he said, "We are talking a pesticide treadmill here. It is simply coming back to kick us in the bottom now with immune weeds.
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