Insecticiden

Pierre Mineau: Tennekes’s self-published assessment of a ‘disaster in the making’ was correct in the fundamentals

Evidence that neonicotinoids are a strong contributor to insect declines should not come as a surprise. Their use has exploded in the last two decades. As early as 2008, the USEPA in one of its reviews of thiamethoxam went as far as to predict “structural and functional changes of both the aquatic and terrestrial ecosystems” following registration of the insecticide. Such a broad statement of concern is rarely encountered in a formal regulatory assessment. It is unfortunate indeed that this EPA scientist’s views fell on deaf ears.

Bewoners van Westerveld onderzoeken landbouwgif in bodem en water en vinden 57 middelen

In het Drentse Westerveld worden op grote schaal lelies geteeld. Daarbij gebruiken de boeren veel bestrijdingsmiddelen. Honderdzestig bezorgde omwonenden van velden met lelieteelt in Westerveld lieten dertien monsters van de bodem en het oppervlaktewater onderzoeken en vonden giftige stoffen. In tien grond- en gewasmonsters zaten 57 verschillende bestrijdingsmiddelen. De burgers eisen dat de overheid maatregelen neemt.

The novel pesticide flupyradifurone (Sivanto) affects honeybee motor abilities

A new pesticide by the name of “Sivanto” was recently released by Bayer AG. Its active ingredient flupyradifurone binds to the nicotinic acetylcholine receptor (AchR) in the honeybee brain, similar to neonicotinoids. Nevertheless, flupyradifurone is assumed to be harmless for honeybees and can even be applied on flowering crops. So far, only little has been known about sublethal effects of flupyradifurone on honeybees. Intact motor functions are decisive for numerous behaviors including foraging and dancing.

Six days of eating all organic is enough to significantly reduce pesticide levels in the body

Researchers in California just demonstrated that a mere six days of eating all organic is enough to significantly reduce levels of harmful pesticides in your body. In the study, four families (with completely different backgrounds) consumed conventional products for six days and had their urine tested. Then, they ate a 100 percent organic diet for six days and had their urine tested again. The drop in pesticide levels present in their urine between tests was massive.

Pesticides as Poisons

There has been a recent investigation here on Bellingcat, of a poisoning incident in Bulgaria in April 2015, where an individual named Emilian Gebrev was posioned. An angle of this investigation has been to see if it is at all connected to the attempted murder of Sergei Skripal. One particular aspect of recent publicity has been to examine whether or not a “Novichok” series nerve agent was responsible for the 2015 poisoning incident.

NRC checkt: ‘Mondiaal neemt 40 procent van de insectensoorten af’ en noemt uitspraak ongefundeerd

Naar aanleiding van de kelderende insectenaantallen besloten twee Australische biologen, Francisco Sánches-Bayo en Kris Wyckhuys, om de mondiale achteruitgang in kaart te brengen. Daarvoor analyseerden ze 73 artikelen over insectenbiodiversiteit uit de afgelopen 40 jaar. In het tijdschrift Biological Conservation schrijven ze over een „wereldwijde afname”. Ze noteren in de samenvatting „dramatische afnamesnelheden” die in een paar decennia zouden kunnen leiden tot „het uitsterven van 40 procent van de insectensoorten wereldwijd”.

Study Shows Pesticide Levels in Families Dropped by 60% After One-Week Organic Diet

A new peer-reviewed study shows that eating a completely organic diet—even for just one week—can dramatically reduce the presence of pesticide levels in people, a finding that was characterized as “groundbreaking” by critics of an industrial food system that relies heavily on synthetic toxins and chemicals to grow crops and raise livestock. Published in the Environmental Research, the study—titled Organic Diet Intervention Significantly Reduces Urinary Pesticide Levels in U.S.

Als niets wordt ondernomen tegen bestrijdingsmiddelen, verdwijnen insecten binnen een eeuw van de planeet

De globale insectenpopulatie is op weg richting een totale uitroeiing als de trend van de afgelopen dertig jaar zich voortzet. Binnen enkele decennia dreigt er geen enkel insect meer te zijn op onze planeet. De gevolgen zullen catastrofaal zijn voor de “natuurlijke ecosystemen”, maar ook voor “de overlevingskansen van de mensheid”. Dat stellen twee wetenschappers, onder wie een Belg, in de eerste wereldwijde studie over het onderwerp.

Acetamiprid Residues in Water Reservoirs in the Cotton Basin of Northern Benin

An Ultra performance liquid chromatography (UPLC) coupled to UV detection method was developed to determine acetamiprid residues in water reservoirs of northern Benin, close to cotton fields. The quantification limit of this method was 0.2 µg L−1 acetamiprid in water, its precision ranged between 8% and 22%, and its trueness between 99% and 117% (for concentrations ranging from 0.2 to 5.0 µg L−1). Acetamiprid residues were determined in water samples collected in four reservoirs from northern Benin during the phytosanitary treatment period of cotton.

Temporal pattern in imidacloprid levels in an urban stream in southern California

Imidacloprid is a widely used insecticide with high runoff potential posing a significant threat to aquatic ecosystems. In order to determine the spatial and temporal concentrations of imidacloprid in Forester Creek, a tributary to the San Diego River, surface water samples were collected from two sites under wet-weather and dry-weather conditions. Imidacloprid was detected with 100% frequency in surface water samples from Forester Creek with a median concentration of 16.9 ng/L (range: 3.8–96.8 ng/L). Over 60% of samples exceeded U.S. EPA's chronic exposure benchmark (10 ng/L).