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emmarrogers

Analysis of pesticides in surface water, stemflow, and throughfall in an agricultural a... - 0 views

www.sciencedirect.com/...S0045653518311913

HSR HSR-2025 science environmental chemistry pesticide

shared by emmarrogers on 11 Sep 24 - No Cached
  • The highest pesticide concentration observed was 10.50 μg/L of metolachlor
  • sticide in surface water and stemflow samples was metolachlor (0.09–10.5 μg/L), h
  • he most commonly detected pesticide in throughfall samples was biphenyl (0.02–0.07 μg/L).
emmarrogers

Trends in pesticide concentrations and use for major rivers of the United States - Scie... - 0 views

www.sciencedirect.com/...S0048969715302928

HSR-2025 environmental pesticide crayfish

shared by emmarrogers on 11 Sep 24 - No Cached
  • The pesticides include the herbicides cyanazine, alachlor, atrazine and its degradate deethylatrazine (DEA), metolachlor, and simazine; and the insecticides chlorpyrifos, malathion, diazinon, carbofuran, and carbaryl.
  • All 11 compounds are among the top 20 most frequently detected in US streams and rivers
emmarrogers

Pesticides in US Rivers: Regional differences in use, occurrence, and environmental tox... - 0 views

www.sciencedirect.com/...S0048969721022178

HSR HSR-2025 science biology environmental

shared by emmarrogers on 20 Aug 24 - No Cached
  • Although agricultural pesticide use was at least 2.5 times higher in the Midwest
  • average number of pesticides detected in the Midwest was at least 1.5 higher (n = 25)
emmarrogers

Acute toxicity of triazine pesticides to juvenile signal crayfish (Pacifastacus leniusc... - 0 views

pubmed.ncbi.nlm.nih.gov/24362090

crayfish HSR-2025 HSR pesticide environmental

shared by emmarrogers on 13 Sep 24 - No Cached
  • The aim of this research was to evaluate the acute toxicity of atrazine, hexazinone, metribuzine, prometryne, simazine, and terbutryne
  • 96hLC50
    • emmarrogers
      emmarrogers on 17 Sep 24
       
      96 hours for the lethal concentration to kill 50 percent of the population
  • mg.l-1
    • emmarrogers
      emmarrogers on 17 Sep 24
       
      Milligrams per litre
emmarrogers

Herbicide concentrations in the Mississippi River Basin-the importance of chloroacetani... - 0 views

www.sciencedirect.com/...S0048969703005084

crayfish HSR-2025 HSR environmental pesticide

shared by emmarrogers on 12 Sep 24 - No Cached
  • eethylatrazine
  • deisopropylatrazine
  • atrazine
    • emmarrogers
      emmarrogers on 12 Sep 24
       
      Atrazine is one of the main pesticides used in Agriculture
  • ...2 more annotations...
  • DEA was detected in 61%, and DIA was detected in 42% of water samples collected from the Mississippi River at Baton Rouge
  • In 1991, alachlor ESA concentrations ranged from 0.2 to 0.9 μg/l, whereas alachlor concentrations ranged from 0.05 to 0.1 μg/l for multiple samples collected from the mouth to the headwaters of the Mississippi River
Sean Nash

Microwaving an insecticide restores its mosquito-killing power - 1 views

www.sciencenews.org/...to-microwave-insecticide-spray

deltamethrin pesticide mosquito insecticide DDT crystals crystalline structure biochemistry environment evolution ecology chemistry heat potential research idea biology engineering environmental science HSR HSR-2023 HSR-2025

shared by Sean Nash on 11 Jun 24 - No Cached
  • Heating an insecticide can give it new life.
    • Sean Nash
      Sean Nash on 11 Jun 24
       
      Wait... what?
  • Microwaving the insecticide deltamethrin rearranges its crystal structure but doesn’t change its chemical composition. The rearrangement renews deltamethrin’s ability to kill mosquitoes that have become resistant to the insecticide, researchers report April 21 in Malaria Journal.
    • Sean Nash
      Sean Nash on 11 Jun 24
       
      Seems like potential feasibility
  • The microwave worked just as well, but Kahr cautions that people shouldn’t use the same microwave for heating food and insecticides.
    • Sean Nash
      Sean Nash on 11 Jun 24
       
      Ha! Oh really??
  • ...6 more annotations...
  • insecticide resistance is a growing problem
  • “There are all kinds of social and cultural things that you could propose from a scientific perspective that wouldn’t be welcomed by a community of homeowners.”
    • Sean Nash
      Sean Nash on 11 Jun 24
       
      Another positive...
  • It’s not certain that the heat-treated deltamethrin would retain its more potent crystal structure through the net-making process.
  • Kahr’s team is working on incorporating the heat-treated crystal into nets.
  • It is encouraging that heated insecticide killed highly resistant mosquitoes, says Hemingway, who directs the Infection Innovation Consortium, a public-private effort to find new ways to combat infectious diseases. But, she says, “this is not something we can take and use that tomorrow.”
    • Sean Nash
      Sean Nash on 11 Jun 24
       
      OK.... this is how you can find an opening (not saying THIS ONE is necessarily, but, when you see language like: "we can't really do it just yet," that is a screaming opportunity to see what we MIGHT be able to add to that. We would just want to get early approval from the fair re: hazardous substances. I think we could.
  • Kahr and colleagues previously discovered that heating deltamethrin changed its crystal structure, which let it work faster
  • Sean Nash on 11 Jun 24
     
    "Wait, what? Do say more....."
Sean Nash

Add to the many afterlives of coffee grounds: Toxic cleanup - 0 views

www.anthropocenemagazine.org/...f-coffee-grounds-toxic-cleanup

coffee pollution toxins environment ecology toxicity bentazone pesticide HSR HSR-2025 potential research idea environmental botany science questions biology

shared by Sean Nash on 15 May 24 - No Cached
  • The experts selected onion plants to test out this idea, known for their high sensitivity to toxins in the environment. In beakers of water containing bentazone, they grew onion root tissue, called meristems, measuring its cell division and root growth as a sign of health. 
    • Sean Nash
      Sean Nash on 15 May 24
       
      One of the things I want VERY badly for our program... is a set of equipment for histology... where we can take things like onion root tips and lock samples in wax, slice them incredibly thin (microslices), and then be able to mount them onto slides for analysis.
emmarrogers

Effect of Chronic Exposure to Prometryne on Oxidative Stress and Antioxidant Response i... - 0 views

www.ncbi.nlm.nih.gov/...PMC3976930

crayfish pesticide HSR-2025 HSR environmental biology behavioralscience

shared by emmarrogers on 20 Sep 24 - No Cached
  • oxidative stress
    • emmarrogers
      emmarrogers on 20 Sep 24
       
      Is this the same a phycological stress, or is it a different kind of stress?
emmarrogers

Effects of Prometryn Exposure on Hepatopancreas Oxidative Stress and Intestinal Flora i... - 0 views

www.ncbi.nlm.nih.gov/...PMC10451815

crayfish pesticide HSR-2025 HSR environmental biology behavioralscience

shared by emmarrogers on 20 Sep 24 - No Cached
  • Eriocheir sinensis
    • emmarrogers
      emmarrogers on 20 Sep 24
       
      Chinese mitten crab
  • alternative to atrazine due to its low toxicity
  • In addition, due to its low toxicity to fish, prometryn can be applied directly to aquatic activities for the removal of harmful algae and weeds in aquaculture waters
  • ...3 more annotations...
  • However, there is a paucity of studies on the negative effects of prometryn on aquatic crustaceans.
  • could affect the physiological behavior of crustacean aquatic organisms
  • Previous studies have shown that the commonly used herbicides glyphosate and atrazine are capable of causing oxidative stress,
emmarrogers

Acute exposure to chlorpyrifos and glyphosate induces changes in hemolymph biochemical ... - 0 views

www.sciencedirect.com/...S153204561930095X

crayfish HSR-2025 HSR pesticide

shared by emmarrogers on 02 Oct 24 - No Cached
  • The 96 h LC50 values of glyphosate to A. leptodactylus were 7.83 ± 0.50 mg L−1
    • emmarrogers
      emmarrogers on 02 Oct 24
       
      This is the first 96hLC50 I have seen for crayfish
  • emmarrogers on 02 Oct 24
     
    "Astacus leptodactylus"
emmarrogers

Sub-acute toxicity of the herbicide glufosinate-ammonium exposure in adult red swamp cr... - 0 views

pubmed.ncbi.nlm.nih.gov/37742863

crayfish HSR-2025 HSR potential research idea pesticide

shared by emmarrogers on 16 Sep 24 - No Cached
  • 21 days
    • emmarrogers
      emmarrogers on 16 Sep 24
       
      This is over 7 times the other studies I have seen
    • emmarrogers
      emmarrogers on 16 Sep 24
       
      they are usually 24-96 hours
emmarrogers

Effects of the herbicide metolachlor on the perception of chemical stimuli by Orconecte... - 0 views

www.journals.uchicago.edu/...1468482

crayfish HSR-2025 HSR potential research idea pesticide

shared by emmarrogers on 16 Sep 24 - No Cached
  • It is not clear if this interference comes from masking the odor, where the animal cannot detect the signal over the background noise, or if there is a physiological effect on the olfactory receptor cells or neuromusculature that influences the animal’s behavior
emmarrogers

Atrazine Exposure Affects the Ability of Crayfish (Orconectes rusticus) to Localize a F... - 0 views

link.springer.com/...s00244-015-0142-y

crayfish HSR-2025 HSR potential research idea pesticide

shared by emmarrogers on 16 Sep 24 - No Cached
  • all levels of the aquatic food web
    • emmarrogers
      emmarrogers on 16 Sep 24
       
      This is a compelling argument for the idea that crayfish are a keystone species
    • emmarrogers
      emmarrogers on 16 Sep 24
       
      look 2 rows down
  • Because crayfish are a keystone species
emmarrogers

The role of omnivorous crayfish in littoral communities | Oecologia - 0 views

link.springer.com/...s00442-004-1548-9

crayfish HSR-2025 HSR potential research idea pesticide

shared by emmarrogers on 16 Sep 24 - No Cached
  • indirectly
  • Metaphytic algae were strongly affected by crayfish presence
  • dramatic direct and indirect impacts
  • ...1 more annotation...
  • Abstract
    • emmarrogers
      emmarrogers on 16 Sep 24
       
      this entire article supports the idea that crayfish are a keystone species
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