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Good testimony for wine growers in Thurgau – Canton has examined wines for pesticide residues

The cantonal laboratory of Thurgau has homemade wine on the remains
Plants tested for plant protection. The industry is pleased to note laboratory findings.

Sebastian Keller

Grapes in the vineyard of Thurgau. (Picture: Andrea Stalder, September 21, 2016)

Grapes in the vineyard of Thurgau. (Picture: Andrea Stalder, September 21, 2016)

Pesticides are on everybody's lips. However, in Thurgau wines, fortunately, only the approved active ingredients are "in very small quantities". This is a finding of the Canton Laboratory in Thurgau. This looked closer to 35 wines from the year 2016. A summary recently released on its website.

Plant protection products are used in vineyards for the protection of grapevine from pests and weeds, and therefore for yield insurance. In the final product – bottles of wine – the substances can only be present in health-safe quantities.

In total, the laboratory reviewed 18 black and rosé wines and 17 white wines, including one organic wine. All from Thurgau. According to Davide Degiorgi, deputy cantonal chemist, on request, took into account bottles from all the cantons in the canton.

"We took wine from self-serving and wine-growers who have their grapes abroad." The laboratory picked bottles in bottles and labels. And there, where it also applies to the consumer. For example, in a farm. Laboratory staff at Frauenfeld Laboratory examined samples with modern chemical methods.

26 different substances were discovered

The investigation is a good testimony of local winemakers. "Thurgauer winemakers respect the rules on the use of pesticides," says the summary. And further: "The levels of residues of proven active ingredients were far below the permissible maximum levels."

Grape blooms

"At the moment time is brilliant," says Markus Müller, Weinfelder, the vice-president and the chairman of the Thurgau Weine industrial association. "The vineyards begin to flourish." The Department of Veterinary Responsibility Reporting Reporting in the Canton: In addition to the announced increase in temperature, "this week's full blossom can be expected in all regions". Prior to flowering, grape vines are "fairly lush". The wet weather of the last few weeks has given rise to the thrust of vine growth. The department also writes: Rebtriebes are currently in "sensitive phase". At the beginning of June, the first oil stains, as the flare symptoms, were recorded in several regions. Markus Müller is happy that this year's vines are spared diseases and storms. Generally, the grapevine is two weeks behind the heat of 2018 in two weeks. This situation is comparable to "normal" years. "But do not ask me what it will be like," says the winery, "I can say that by the end of the year." (SEB).

A total of 26 different active substances can be detected, some of which are "only selective". There were no surprises in the proven substances. As expected, more commonly used cyprodinil, fludioxonyl, phenhexamide, phthalimide, boskalide and mandipropamide were prevalent. "Two organic wines did not contain pesticides," the lab writes.

All vineyards got a survey report. Then, according to Degiorgia, the winery sees what has been researched and the result. "But only from one's own test," says the deputy Cantonal scientist. The Thurgau investigation preceded the cross-canton. 156 samples of local and 99 wines from neighboring countries were sampled. Six complaints were filed under a national campaign.

The industry association is satisfied with the result

In the Thurgau Wines industrial association the result of the investigation was approved. "This is an important signal," says Markus Müller at the request. The association is chaired by the Rebgut Sunnehalde winegrower at the foot of Otoboro. He says: "This shows that tenants in Thurgau do not use too much herbs to protect them." As for pesticides, he generally says, "We are not injecting voluntarily." "I would rather drink a glass of wine with my customers," the winery explains.

Müller calls for an investigation made by another canton on his shoulder. Then the grapes were viewed – directly from the grapevine. "In this process, active ingredients are not used in viticulture," says the winery. The suspicion that they came from the air from other cultures. Then there were no objections. "Everything was fine," says Müller.