Pesticide use: the tide appears to be turning

14 May

Bayer, the German company which bought the US agrochemical firm Monsanto, acquired its lucrative portfolio of pesticides and genetically modified seeds – and more than 13,000 pending cases relating to glyphosate sold under the brand name Roundup. At its annual meeting in Bonn last month, in an unprecedented revolt, more than 55% of shareholders declared they had no confidence in management. The ongoing fall in its share prices has accelerated. (Reuters 14.5.19).

Prof. Ian Boyd, chief scientific adviser to the UK government points out that regulators around the world have falsely assumed it is safe to use pesticides at industrial scales across landscapes, that other research in 2017 showed farmers could slash their pesticide use without losses and quoted a UNGA report denouncing the “myth” that pesticides are necessary to feed the world.

Recent reports in the BMJ, the International Journal of Epidemiology and the European Food Safety Authority, add weight to Professor Boyd’s stance

Prenatal and infant exposure to ambient pesticides and autism spectrum disorder in children: population based case-control study, BMJ, 20 March 2019 (open access) notes that common pesticides have been previously shown to cause neurodevelopmental impairment in experimental research and environmental exposures during early brain development are suspected to increase risk of autism spectrum disorders in children. The study’s findings suggest that an offspring’s risk of autism spectrum disorder increases following prenatal exposure to ambient pesticides (including glyphosate, chlorpyrifos, diazinon, and permethrin) within 2000 m of their mother’s residence during pregnancy, compared with offspring of women from the same agricultural region without such exposure. Infant exposure could further increase risks for autism spectrum disorder with comorbid intellectual disability.

• In February, researchers at the University of Washington (UW) published a new scientific analysis of glyphosate (PDF) (right), the active ingredient in Monsanto-owned Bayer’s Roundup, the world’s most popular weedkiller. They concluded that evidence supports a “compelling link” between glyphosate and non-Hodgkin lymphoma (NHL), a type of blood cancer.
• Glyphosate exposure increases cancer risk up to 41% according to a study published in the IInternational Journal of Epidemiology (March). Observations in this analysis of >300 000 farmers and agricultural workers from France, Norway, and the USA, included elevations in risks of non-Hodgkin lymphoid malignancies (NHL) overall in association with the organophosphate insecticide terbufos, of chronic lymphocytic leukaemia/small lymphocytic lymphoma (CLL/SLL) with the pyrethroid insecticide deltamethrin and of diffuse large B-cell lymphoma (DLBCL) with the organophosphorus herbicide glyphosate.

• More transparency sought: an EU court ruled on 7 March that the EU Food Safety Authority (EFSA) should publicise studies about Monsanto’s glyphosate weedkiller. The General Court’s statement said that it annulled decisions by the EU food watch agency “refusing access to the toxicity and carcinogenicity studies on the active substance glyphosate”.

• On March 29th – after safety officials reported human health and environmental concerns – EU states voted for a ban of chlorothalonil, a fungicide, after a review by the European Food Safety Authority was unable to exclude the possibility its breakdown products, cause damage to DNA. EFSA also said “a high risk to amphibians and fish was identified for all representative uses”. Recent research further identified chlorothalonil and other fungicides as the strongest factor linked to steep declines in bumblebees.

Reuters reports that a California jury found on Monday that Monsanto’s Roundup likely caused a couple’s cancer and awarded them a staggering $2.055 billion in damages, in a third consecutive Roundup trial loss for the Bayer-owned unit. In one trial last August, a US court in California awarded damages and costs against Monsanto to 46-year-old park worker Dewayne Johnson, who was diagnosed with cancer after using the chemical.

But there’s still way to go; Monsanto – apparently undaunted – offers another  product, said to have less damage potential

Monsanto is reformulating its dicamba pesticide which tended to drift and earlier damaged millions of acres of crops and wild trees in 2017.

Farmers in 25 states had submitted more than 2,700 claims to state agricultural agencies that year and it was banned in the state of Arkansas last year, where almost 900,000 acres of crop damage (above) were reported. Monsanto unsuccessfully sued the state in an effort to stop the ban.

A lower volatility formulation, M1768, ‘a product with less potential to volatilize and move off the target area’ has been approved by the EPA for use until 2020 – on corn, wheat, cotton, soybeans and other crops – though it has not been evaluated by experts independent of Monsanto. It was obliged by the American government’s Environmental Protection Agency to agree to registration and labelling changes for the 2018 growing season, including making these products restricted-use and requiring record-keeping and additional measures to prevent spray drift.

 

 

 

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