Weed Resistance to Glyphosate on GMO Crops: EPA Needs to Do Better
The U.S. Environmental Protection Agency (EPA) is not doing enough to prevent weed resistance to the herbicide glyphosate (Roundup) says a new report from the EPA's Inspector General's Office, which draws in part on a report from the agbiotech company, Pioneer: Weed Management in the Era of Glyphosate Resistance.
The EPA Inspector General's Office report explains that glyphosate (Roundup) is used on crops modified to tolerate this herbicide, which kills surrounding weeds but leaves the GMO crop intact.
If you use enough of it long enough, weeds develop resistance.
U.S. farmers are planting more herbicide-resistant GMO corn and soybeans (this figure is from the Pioneer report):
Here's how much glyphosate U.S. farmers are using:
- 2002: 110 million pounds
- 2012: 283.5 million pounds
Weeds resistant to herbicides were first reported in 1968. Weed resistance is now increasing rapidly (this figure is from the Inspector General's Office report):
Weeds resistant to glyphosate are spreading rapidly throughout the U.S. (this figure is in both reports):
What should government do to stop this? A quick lesson on GMO regulation:
- U.S. Department of Agriculture regulates these crops.
- EPA regulates herbicides used on these crops
- U.S. Food and Drug Administration regulates their safety.
The EPA Inspector General said EPA is not doing enough to mitigate herbicide resistance:
- It is not communicating with farmers or other stakeholders about managing resistance.
- It is not collecting data on herbicide resistance through its adverse incident reporting database.
- It is not dealing with the need to develop alternatives.
- It is not tracking progress in addressing weed resistance.
- It needs to do better.
What should be done? Pioneer says:
A truly integrated strategy should incorporate non-chemical control tactics as well. Mechanical weed control and crop rotation are examples of two such tactics available to growers, but the feasibility of their implementation will vary depending on the characteristics of a cropping system.
Non-chemical control tactics? Sounds like sustainable agriculture, no?
Weed resistance is a big reason not to use glyphosate.
Another is its suspected carcinogenicity, but I will save that for another time.
Sweden's reindeer have a problem. In winter, they feed on lichens buried beneath the snow. But the climate crisis is making this difficult. Warmer temperatures mean moisture sometimes falls as rain instead of snow. When the air refreezes, a layer of ice forms between the reindeer and their meal, forcing them to wander further in search of ideal conditions. And sometimes, this means crossing busy roads.
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By Aaron W Hunter
A chance discovery of a beautifully preserved fossil in the desert landscape of Morocco has solved one of the great mysteries of biology and paleontology: how starfish evolved their arms.
The Pompeii of palaeontology. Aaron Hunter, Author provided<h2></h2><p>Although starfish might appear very robust animals, they are typically made up of lots of hard parts attached by ligaments and soft tissue which, upon death, quickly degrade. This means we rely on places like the Fezouata formations to provide snapshots of their evolution.</p><p>The starfish fossil record is patchy, especially at the critical time when many of these animal groups first appeared. Sorting out how each of the various types of ancient starfish relate to each other is like putting a puzzle together when many of the parts are missing.</p><h2>The Oldest Starfish</h2><p><em><a href="https://www.biorxiv.org/content/10.1101/216101v1.full.pdf" target="_blank" rel="noopener noreferrer">Cantabrigiaster</a></em> is the most primitive starfish-like animal to be discovered in the fossil record. It was discovered in 2003, but it has taken over 17 years to work out its true significance.</p><p>What makes <em>Cantabrigiaster</em> unique is that it lacks almost all the characteristics we find in brittle stars and starfish.</p><p>Starfish and brittle stars belong to the family Asterozoa. Their ancestors, the Somasteroids were especially fragile - before <em>Cantabrigiaster</em> we only had a handful of specimens. The celebrated Moroccan paleontologist Mohamed <a href="https://doi.org/10.1016/j.palaeo.2016.06.041" target="_blank" rel="noopener noreferrer">Ben Moula</a> and his local team was instrumental in discovering <a href="https://www.sciencedirect.com/science/article/abs/pii/S0031018216302334?via%3Dihub" target="_blank" rel="noopener noreferrer">these amazing fossils</a> near the town of Zagora, in Morocco.</p><h2>The Breakthrough</h2><p>Our breakthrough moment came when I compared the arms of <em>Cantabrigiaster</em> with those of modern sea lilles, filter feeders with long feathery arms that tend to be attached to the sea floor by a stem or stalk.</p><p>The striking similarity between these modern filter feeders and the ancient starfish led our team from the University of Cambridge and Harvard University to create a new analysis. We applied a biological model to the features of all the current early Asterozoa fossils in existence, along with a sample of their closest relatives.</p>
Cantabrigiaster is the most primitive starfish-like animal to be discovered in the fossil record. Aaron Hunter, Author provided<p>Our results demonstrate <em>Cantabrigiaster</em> is the most primitive of all the Asterozoa, and most likely evolved from ancient animals called crinoids that lived 250 million years before dinosaurs. The five arms of starfish are a relic left over from these ancestors. In the case of <em>Cantabrigiaster</em>, and its starfish descendants, it evolved by flipping upside-down so its arms are face down on the sediment to feed.</p><p>Although we sampled a relatively small numbers of those ancestors, one of the unexpected outcomes was it provided an idea of how they could be related to each other. Paleontologists studying echinoderms are often lost in detail as all the different groups are so radically different from each other, so it is hard to tell which evolved first.</p>
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