60 Million Acres of Monarch Butterfly Habitat to Be Doused With Herbicide – Despite Steep Declines in Monarch Population, Dicamba Will Be Used in Heart of Migration Path
PORTLAND, Oregon, 1 March 2018 (CBD) – Within the next two years, more than 60 million acres of monarch habitat will be sprayed with an herbicide that’s extremely harmful to milkweed, the only food for monarch caterpillars, according to a new analysis by the Center for Biological Diversity.
Monarch populations have already fallen by 80 percent in the past two decades due to escalating pesticide use and other human activities. Now the Center’s report A Menace to Monarchs shows that the butterfly faces a dangerous new threat from accelerating use of the notoriously drift-prone and highly toxic weed killer dicamba across an area larger than the state of Minnesota.
“America’s monarchs are already in serious trouble, and this will push them into absolute crisis,” said Nathan Donley, a senior scientist at the Center. “It’s appalling that the EPA approved this spraying without bothering to consider the permanent damage it will do to these butterflies and their migration routes.”
Today’s report found that by 2019, use of dicamba will increase by nearly 100-fold on cotton and soybean fields within the monarch’s migratory habitat across the heart of the United States.
Other key findings include:
- Accelerating harm: In addition to 61 million acres of monarch habitat being directly sprayed with dicamba, an additional 9 million acres could be harmed by drift of the herbicide.
- Deadly timing: The timing and geographical distribution of dicamba use coincides precisely with the presence of monarch eggs and larva on milkweed.
- Double trouble: Dicamba degrades monarch habitat both by harming flowering of plants that provide nectar for adults as they travel south for the winter and by harming milkweed that provides an essential resource for reproduction.
- Greater menace to milkweed: Research has shown that just 1 percent of the minimum dicamba application rate is sufficient to reduce the size of milkweed by 50 percent, indicating it may have a greater impact on milkweed growth than the already widely used herbicide glyphosate.
The Environmental Protection Agency in 2016 approved new dicamba products for use on genetically engineered cotton and soybeans. In 2017 there were reports of at least 3.6 million acres of off-target, dicamba-induced damage to agricultural crops and an unknown amount of damage to native plants and habitats, including forests. The EPA has refused to take necessary action to address the harms caused by the chemical.
“There’s no question that use of dicamba across tens of millions of acres will deepen risks to our dangerously imperiled monarch populations,” said Donley. “When dicamba’s use on GE cotton and soybeans comes up for reapproval later this year, the only responsible thing for the EPA to do is allow that approval to expire.”
For this analysis the Center examined monarch habitat and projected usage rates for dicamba, with a particular emphasis on examining the effects of increased use of dicamba in the coming years, which is expected to reach about 57 million pounds annually.
The decline in monarchs in recent decades has coincided with the surge in use of glyphosate, which is sprayed on crops genetically altered to survive being sprayed by the herbicide. Around 300 million pounds of glyphosate are sprayed in fields each year in the United States. The massive overuse of glyphosate triggered the large-scale decline of milkweed and the proliferation of glyphosate-resistant weeds across millions of acres. In response to the proliferation of resistant weeds, farmers have turned to dicamba — compounding the danger to monarchs and their habitat. Contact
Nathan Donley, (971) 717-6406, [email protected]
Analysis: 60 Million Acres of Monarch Habitat to Be Doused With Toxic Weed Killer
Source: http://www.desdemonadespair.net/2018/04/60-million-acres-of-monarch-butterfly.html
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