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Daily News Blog

Archive for the 'emamectin' Category


06
Aug

Scottish Fish Farm Industry, Major U.S. Importer, Delays Restrictions on Hazardous Pesticide

(Beyond Pesticides, August 6, 2024) Factory fish farming companies sinched a win in Scotland in July after the Scottish government announced it would not put forward restrictions on emamectin (aka emamectin benzoate)—a toxic pesticide used to kill parasitic sea lice that also kills various nontarget marine life up and down the trophic ladder—until 2028. As reported over many years by The Ferret, an independent journalism cooperative based in Scotland, seafood corporations lobbied the Scottish government in a multiyear campaign to weaken environmental protection standards to advance their economic interests. Health and environmental advocates in the United States acknowledge the parallels of agribusiness, pesticide manufacturers, and their allies in undermining science-based policy and continue to call for intercontinental coordination on organic principles and standards that would render the use of toxic pesticides like emamectin obsolete. Emamectin benzoate is a derivative of avermectin, a family of macrocyclic lactone compounds often used as the primary active ingredient in insecticides targeting parasites. The U.S. Environmental Protection Agency (EPA) considers emamectin benzoate a restricted-use pesticide that is toxic to fish, mammals, and aquatic organisms. Avermectins act as poisons to the nervous system of target pests, stimulating the gamma-aminobutyric acid (GABA) system (a chemical “transmitter” produced […]

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12
Apr

Ocean Health: First Reports of Salmon Lice Resistance in the Pacific Ocean Threatens Local Ecosystems

(Beyond Pesticides, April 12, 2022) A recent study published in Scientific Reports warns that parasitic salmon lice (Lepeophtheirus salmonis) in Pacific Ocean open-net fish farming operations are becoming resistant to emamectin benzoate (EMB), an active ingredient used to control salmon lice population in North America, both in the U.S. and British Columbia, Canada. Previously, researchers believed parasitic salmon lice only had high rates of chemical resistance in the Atlantic region due to the mixing of farmed and wild salmon. However, Pacific salmon lice are exhibiting similar rates of decreased sensitivity to EMB from various sources, including a decrease in the wild Pacific salmon population, overuse of chemical treatments, and reliance on single chemical treatments. The aquaculture industry (e.g., farmed seafood/fish) repeatedly faces sustainability issues, failing to adhere to environmental regulations and threatening marine health. Extensive use of pesticides to rid the parasite has led to widespread resistance to multiple pesticides, prompting increasing infection rates among North Atlantic salmon populations. These parasites endanger both farmed salmon and wild salmon, in addition to other local species of fish. In this context, pesticide treatments contributes to resistance among lethal pest populations, especially in ecologically vulnerable and interconnected ecosystems like ocean basins. The researchers caution, “Salmon […]

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17
Apr

Farmed Salmon during Covid-19 Pandemic Subject to Increased Pesticide Use in Scotland

(Beyond Pesticides, April 17, 2020) As the novel coronavirus pandemic upends much of human activity, some governments are acting to loosen environmental regulations — purportedly, in the interests of public health in the face of Covid-19 threats, and/or in deference to economic concerns of certain industrial sectors. There has been little analysis, to date, of what the “on the ground” impacts of these relaxed rules may be, but news out of Scotland illustrates some kinds of concerns critics and advocates have about such loosening of regulations. The Scottish Environment Protection Agency (SEPA) has issued new, temporary rules that allow some salmon farms both to ignore newly established limits on the amount of emamectin, an insecticide used to control sea lice that plague the salmon, and to boost use of azamethiphos, another insecticide used against the lice, beyond previous 24-hour limits. SEPA says the relaxed rules will endure only as long as the Covid-19 “lockdown” remains in place (perhaps the end of June), and apply only to new or expanding enterprises, which to date total approximately 14 of the country’s 200+ salmon farms. The farmed salmon industry represents a huge domestic and export commodity worth approximately $2.5 billion annually. In addition […]

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