Fungiciden

Greater prairie chickens cannot persist in Illinois without help, researchers report

The greater prairie chicken (Tympanuchus cupido) once dominated the American Midwest, but today the bird is in trouble in many parts of its historic range. It is no longer found in Arkansas, Indiana, Kentucky, Michigan, Ohio, Tennessee, Texas or Wyoming, states where it once flourished. And in Illinois, an estimated 186 birds remain in two adjoining counties in the southern part of the state. "They used to be all over the state," said Illinois Natural History Survey conservation biologist Mark Davis, who participated in a genetic analysis of the Illinois birds.

Reptielen zijn zeer gevoelig voor bestrijdingsmiddelen

Wereldwijd zijn ongeveer 10.000 reptielen bekend. Daarvan komen er een honderdvijftigtal ook in Europa voor, waaronder slangen, hagedissen en schildpadden. 18 procent van de Europese reptielen staat op de rode lijst van de IUCN. Dat komt in de eerste plaats door de achteruitgang van de habitat van de reptielen en het gebruik van gewasbeschermingsmiddelen in de landbouwsector. Een nieuwe studie, die gepubliceerd werd in Environmental Pollution, peilt als één van de eerste studies in zijn soort naar het risico op blootstelling voor Europese reptielen. 102 soorten werden gescreend.

Farmers can slash pesticide use without losing money

French farmers could reduce their pesticide consumption by 30% without losing profitability, a new study published in the review Nature Plants has revealed. More than three quarters of France’s farms could cut their pesticide use if they adapted their agricultural practices. According to the study published by the French National Institute for Agricultural Research (INRA), 77% of the country’s agricultural businesses could slash their use of pesticides without suffering financially.

At least 45 lochs around Scotland’s coast have been contaminated by toxic pesticides from fish farms

At least 45 lochs around Scotland’s coast have been contaminated by toxic pesticides from fish farms that can harm wildlife and human health, according to data released by the Scottish Environment Protection Agency (Sepa). Levels of chemicals used to kill the sea lice that plague caged salmon have breached environmental safety limits more than a hundred times in the last 10 years. The chemicals have been discharged by 70 fish farms run by seven companies.

Pollution of Vembanad Lake

Pesticide residue from rice polders and nutrient discharge from urban settlements are aggravating the pollution of Vembanad Lake, playing havoc with the fragile wetland ecosystem and jeopardising its tourism potential. A study conducted by the Regional Agricultural Research Station (RARS), Kumarakom, under Kerala Agricultural University (KAU), has reported a high level of eutrophication of the lake, a Ramsar site and the hub of backwater tourism in Kerala. Data collected by the environmental surveillance centre at RARS indicate that the organic pollution of the lake is getting worse.

Agricultural Intensification and Innate Immune Function in a Wild Bird Population

Agricultural intensification is an important anthropogenic perturbation of the environment. It is characterized by a specialization of the production process, which results in a switch from diverse plantations to large monocultures. Agricultural intensification is also associated with increased use of pesticides, harvest frequency, and density of plantations in cultivated areas. This type of practice is linked to the population decline of several bird species in Europe and North America.

Interview met Jan Douwe van der Ploeg, WUR hoogleraar rurale sociologie

Moderne landbouwbedrijven worden gebruikt als etalage voor de export van kennis en agrarische technologie. Tegelijkertijd neemt het maatschappelijk draagvlak voor dat soort megabedrijven af omdat ze afbreuk doen aan het landschap en schade berokkenen aan het milieu en de biodiversiteit. Dat betoogt Jan Douwe van der Ploeg (66), scheidend hoogleraar rurale sociologie aan Wageningen Universiteit. In zijn afscheidsrede uitte Van der Ploeg, vaak gezien als een dissident binnen zijn eigen universiteit, scherpe kritiek op het Nederlandse landbouwbeleid en de rol die Wageningen daarin speelt.

Pesticide concentrations in frog tissue and wetland habitats in a landscape dominated by agriculture

We examined the presence of pesticides and nutrients in water and sediment as indicators of habitat quality and assessed the bioaccumulation of pesticides in the tissue of two native amphibian species Pseudacris maculata (chorus frogs) and Lithobates pipiens (leopard frogs) at six wetlands (3 restored and 3 reference) in Iowa, USA. Restored wetlands are positioned on the landscape to receive subsurface tile drainage water while reference wetlands receive water from overland run-off and shallow groundwater sources.

Agricultural intensification caused steep population decline of the Great Bustard in Iran

The current distribution and recent population trends of the Great Bustard ( Otis tarda ) in Iran were investigated based on a literature review and unpublished data (1995–2008) followed by three years of census (2009–2011) in areas where the species is still breeding. Results suggest that Great Bustards have disappeared from a large part of their former distribution in the country, including East Azarbayjan, Hamedan and Kurdistan provinces. The surviving groups are concentrated in West Azarbayjan where numbers are rapidly declining.

De schaduwkant van de tulpen uit Holland

Elk voorjaar staan de bollen in bloei en genieten we van de kleuren. Maar achter die kleuren gaat een taboe schuil: het gebruik van giftige bestrijdingsmiddelen. Daar hebben we het niet graag over. Toch is het gif slecht voor het milieu en slecht voor mens en dier. De vraag is: valt er te leven met het risico van gezondheidsschade? Of dat de economie mag prevaleren boven de volksgezondheid. Kunnen we vergelijkingen maken met de Q-koorts in Brabant? Het zal wel loslopen, zei men daar, totdat er doden vielen.