• LIving Near Fields Increases Pesticide Exposure
  • Learn About Pesticides in Foods
  • Grow a Lush Garden Organically
  • Learn About Colony Collapse Disorder and How to Protect Bees
  • Driving Near Recently Sprayed Fields Exposes People to Pesticides
  • Weeds Can Be Managed Without Chemical Pesticides
  • Learn to Manage Pests Naturally
  • Learn To Manage Weeds Without Chemical Pesticides
  • Learn to Keep Insects Out of your Crops
  • SNAP Tour of Organic Vegetable Garden

Archives for 2022

Monday, January 17, 2022

Neonicotinoids Pass Through Aphids, Contaminating Honeydew and Killing off Pest Predators

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Neonicotinoids Pass Through Aphids, Contaminating Honeydew and Killing off Pest Predators

(Beyond Pesticides, January 6, 2022) Seeds treated with neonicotinoid insecticides contaminate honeydew, often the biggest source of food for pest predators, according to recent research published in the journal Environmental Pollution... But there is another systemic effect that is not included in that picture, and in monoculture crops, (honeydew) could be the biggest source of carbohydrates for beneficial pest predators “This rich carbohydrate source is a common food for many beneficial insects, including pollinators, such as bees and flies, and some natural enemies of pests, such as ants, wasps and beetles,” said John Tooker, PhD, coauthor of a recent literature review published in Biological Reviews. “Honeydew often is more abundant than nectar in agroecosystems.” 

Researchers found that concentrations of the neonicotinoid clothianidin (the chemical tested by scientists, as it is the immediate breakdown product of the neonicotinoid thiamethoxam), are 9 to 11 times higher in aphid honeydew derived from plants that were seed treated with neonicotinoids (at ~35-45 parts per billion), compared to those untreated. Importantly, however, aphids from untreated blocks also had neonicotinoids in their honeydew (at ~1.5-6 ppb). Researchers indicate that this was either from prior plantings on the plot of land chosen, or from runoff from nearby applications causing contamination in the untreated plot.  The results also reveal that pest predators die off much faster when eating contaminated honeydew. The pesticides identified as particularly problematic for this route of exposure are generally those the researchers indicate have systemic properties.  

SNAPComment: There are currently 16 PMRA registered pesticides containing thiamethoxam in Canada, and 16 containing clothianidin. Many more contain other neonicotinoids.

filed under neonicotinoids and wildlife/insects

Monday, January 17, 2022

Banned Pesticides in Well Water Linked to Declines in Kidney Function

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Banned Pesticides in Well Water Linked to Declines in Kidney Function

(Beyond Pesticides, January 12, 2022) Well water in agricultural regions of Sri Lanka is contaminated with highly hazardous insecticides and associated with a decline in kidney function, according to research published in npj Clean Water this month. 

Of the wells sampled, 68% were found to contain pesticides. Further, every well where pesticides were detected had at least one pesticide recorded above global drinking water guidelines. The chemicals found were also some of the most toxic pesticides to ever be sold, including the organochlorine insecticides DDT/DDE, propanil, and endosulfan, and the organophosphate diazinon. None of these chemicals are permitted for use in Europe or the United States, and some like endosulfan are being phased out globally through the Stockholm Convention.

The study found that individuals reporting drinking well water during their lifetimes had glomerular filtration rate (a measurement of kidney health) that was significantly lower on average (6.7) than other individuals who never drank well water, after accounting for differences in age and sex. 

SNAP Comment: I don't know of many well water contamination studies in Canada. There are currently no PMRA registered products containing DDT/DDE (down from 55), propanil  (down from 7), endosulfan (down from 16) in Canada and 5 (down from 184)  diazinon products (2 commercial and 3 in ear tags). 

filed under kidney and industry shenanigans/Interference with Research and Research Publication

Monday, January 17, 2022

Household Pesticide Use Harms Infant Motor Skill Development

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Household Pesticide Use Harms Infant Motor Skill Development

(Beyond Pesticides, January 5, 2022) Household pesticide use is associated with harmful impacts to infant motor development, according to a study published late last year in the journal Paediatric and Perinatal Epidemiology. As with other pollutants in society, low-income, people of color communities are disproportionately in contact with toxic pesticides, resulting in exposures that can start early, and affect health over the course of one’s lifetime. '“In adjusted models, infants whose mothers reported household use of rodent or insect pesticides had 1.30 (95% CI 1.05, 1.61) times higher expected gross motor scores than infants in households with no reported household pesticide use, with higher scores indicating decreasing gross motor performance,” the study indicates. Household pesticide use over the last decade has generally shifted away from the use of older organophosphate chemistries to the use of synthetic pyrethroid insecticides. But this switch has not resulted in safer exposures; a growing body of literature is finding that synthetic pyrethroids can cause a range of adverse health impacts, particularly in children.'

filed under children and pyrethrins

Monday, January 17, 2022

Common Home Fumigation Pesticide Associated with Increased Greenhouse Gas Emissions

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Common Home Fumigation Pesticide Associated with Increased Greenhouse Gas Emissions

(Beyond Pesticides, January 11, 2022) A study finds that the pesticide sulfuryl fluoride, used for insect (i.e., termites, bedbugs, cockroaches, etc.) fumigation treatments, increases greenhouse gas (GHG) emissions, according to the report, “Termite Fumigation in California Is Fueling the Rise of a Rare Greenhouse Gas.” . However, researchers have identified concentrations of sulfuryl fluoride in the atmosphere due to the chemical’s long half-life and greenhouse warming potential (GWP). The California Global Warming Solutions Act of 2006 does not list sulfuryl fluoride emissions as a GHG risk. Therefore, the researchers note, “This work emphasizes the importance of considering sulfuryl fluoride SO2F2 in state and national greenhouse gas inventories and emissions reduction strategies.”

SNAP Comment: There are currently 2 PMRA registered sulfuryl fluoride products in Canada used in structural fumigation for stored product pests, mostly food. 

Monday, January 17, 2022

Direct pesticide exposure of insects in nature conservation areas in Germany

a buffer of at least 2 km is needed to avoid contamination.

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 Direct pesticide exposure of insects in nature conservation areas in Germany  (Carsten A. Brühl et al; Scientific Reports,16 December 2021)

In total, residues of 47 current use pesticides were detected, and insect samples were on average contaminated with 16.7 pesticides. Residues of the herbicides metolachlor-S, prosulfocarb and terbuthylazine, and the fungicides azoxystrobin and fluopyram were recorded at all sites. The neonicotinoid thiacloprid was detected in 16 of 21 nature conservation areas, most likely due to final use before an EU-wide ban. The individual chemicals reflect sales volume of each.  A change in residue mixture composition was noticeable due to higher herbicide use in spring and increasing fungicide applications in summer. The number of substances of recorded residues is related to the proportion of agricultural production area in a radius of 2000 m. Therefore, a drastic pesticide reduction in large buffers around nature conservation areas is necessary to avoid contamination of their insect fauna.   see also Insects in Nature Preserves Contaminated with Over a Dozen Pesticides (Beyond Pesticides, January 13, 2022) 

SNAP Comment: As mentioned in the article, the higher chemical detection reflects volume of sales so a similarly designed study in other locations would have to reflect pesticide use and persistence in the area. There are currently 32 PMRA registered pesticide products containing metolachlor in Canada, 0 present or historical containing prosulfocarb, 0 present or historical containing terbuthylazine,  44 (down from 49) containing azoxystrobin, 18 containing fluopyram and 4 containing the neonicotinoid thiacloprid. 

filed under insects and mixtures

Wednesday, January 12, 2022

Silence of the Clams—Study Highlights the Threat of Multiple Pesticide Stressors to Bivalves

forestry pesicides tested but not glyphosate

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“Silence of the Clams”—Study Highlights the Threat of Multiple Pesticide Stressors to Bivalves

(Beyond Pesticides, January 4, 2021) Chronic exposure to pesticides used in conventional forestry operations runoff and harm soft shell clams, according to a recent study published in Science of the Total Environment, entitled “The silence of the clams: Forestry registered pesticides as multiple stressors on soft-shell clams. Rather than focusing on the impact of a single chemical, researchers analyzed the combined effects of several pesticides.

The pesticides tested included various combinations of atrazine, hexazinone, indaziflam, and bifenthrin. Every ten days, the tanks were dosed, and 30 days the clams were analyzed for their weight and growth.

Every combination of pesticide dosing resulted in higher mortality rates than control tanks where clams were not exposed to any pesticides.  Many of the nonlethal changes observed indicate a loss of fitness in the environment, such as elongated shells, low tissue weight, and slower rate of clearing algae from their tank with clams exposed to a combination of atrazine and hexazinone.'

filed under wildlife/aquatic organisms

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Wednesday, January 12, 2022

Glyphosate-induced gut microbiota dysbiosis facilitates male reproductive toxicity in rats

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Glyphosate-induced gut microbiota dysbiosis facilitates male reproductive toxicity in rats (Sci Total Environ. 2022 Jan 20;805: Epub 2021 Sep 16,2021).

' Data showed that GLY(phosate)-exposed rats exhibited male reproductive dysfunction, evidenced by impaired testis architectural structure, reduced sperm motility, together with increased sperm malformation ratio....these findings uncover an underlying mechanistic scenario that gut microbiota dysbiosis-driven local IL-17A production is one reason responsible for male reproductive toxicity induced by GLY, which provides new insights into the male reproductive toxicity of GLY in mammals. '

filed under glyphosate and digestive tract/human microbiome

Thursday, January 6, 2022

Content Here.Class action lawsuit: Gramoxone (Paraquat) associated with Parkinson’s Disease

Content Here.Class action lawsuit: Gramoxone (Paraquat) associated with Parkinson’s Disease

Gramoxone® is a herbicide used to control weeds and grasses with an active ingredient called paraquat. It is alleged that paraquat exposure is linked to Parkinson’s disease.

Siskinds and its Québec-based affiliate Siskinds Desmeules have filed proposed class action lawsuits on behalf of all Canadians who have been diagnosed with Parkinson’s disease after using and/or being exposed to Gramoxone®, since July 1, 1963. The actions have been filed in Ontario, British Columbia, and Québec, and are brought against Syngenta AG, Syngenta Crop Protection LLC, Syngenta Canada Inc., Syngenta International AG, and Syngenta Crop Protection AG (the “Defendants”).

filed under legal/litigation/Canada