Rat poison: time to think again

Just as the use of insecticides does not solve a mosquito problem, vermin are not controlled by repeated use of poisons.

Rat poison lodged in letter-box. Rat poison lodged in letter-box. Photo: Vivian Grisogono

For many years, rat poison has been delivered to households all over the island in totally inadequate cellophane bags. To make matters worse, the instructions are inside, so the poison has to be handled if you want to read them. Foreign residents who do not know Croatian are at a disadvantage. One thought that the white tablet which comes with the red warfarin mixture was the antidote. Luckily, they had no occasion to try it, as the tablet is a separate poison meant for septic tanks, and has no antidote. The antidote to the warfarin is vitamin K. Warnings that the poison is about to be delivered are patchy and haphazard. While the official Stari Grad website always carries advance notice, that has not been the case elsewhere. In Pitve it was usually a small notice taped to the rubbish bin a day or two beforehand. However, during 2016 there has been an improvement in Jelsa, with warnings being given on the Council's website as well as on the Town Hall notice board.

Warning of the impending poison delivery on the rubbish bin. Photo: Vivian Grisogono

By law, vitamins have to be packaged securely, but it seems that rat poison does not. EU membership has not changed this irresponsible and dangerous custom. The bags are left apparently randomly around the villages. I have found them variously on a window sill, dangling from my post-box, even on top of my car! Delivery is clearly irresponsible. Are the poisons used in a more responsible manner? All too often, they are simply placed in heaps around a property, even where they may be a hazard to pets or young children. The safest way to put down such poisons - if you feel you must - is to use a rigid tube with access holes at either end large enough for mice or rats, but too small for other animals.

Packaged rat poison as delivered to local households. Photo: Vivian Grisogono

While vermin within buildings present a problem and possible health hazard, the same is not true of mice and rats in the wild, which have their place, not least in the natural food chain. For an insight into their lifestyles, see the video below, or click here.

Given regular doses of poison, rats become resistant, so poison is not the solution. On the other hand, although the poison is not supposed to attract other animals, it does, and cats and dogs have died through eating it. The more's the pity, as cats keep rats, mice and even snakes under control. For any major rat infestation, the best methods for avoiding the problem of resistance are to let tenacious dogs like Jack Russell terriers hunt them, or to use traps.

Rat poison delivered to a car roof. Photo: Vivian Grisogono

The local councils must spend quite a significant sum of money on distributing these poisons. Looking at the 2015 financial report from Jelsa Council, I was unable to identify exactly how much was spent on the campaigns against vermin and insects, as these items were not identified individually. Is this money being spent wisely? I think not.

In the United Kingdom, poisons against vermin are available, but are not generally distributed by local councils. They were (and maybe still are) distributed on request. Some sixty years ago, when we lived not far from London, my brother, sister and I came home from school to find an unmarked jam jar on the kitchen table. Ever adventurous, my sister delved in. “Cheesy“, she purred, and continued to satisfy her hunger. There was no fridge full of food in those days, indeed no fridge, and the larder was empty. However, Brother and I were more cautious, and refused her kind offer to share. Our mother's horror when she came home from work sometime later and asked where the rat poison was can be imagined. Sister spent the night in hospital, where diligent stomach pumping saved her life. I think that was the last time the local council left unmarked rat poison in anyone's home in an innocent-looking, insecure jam jar.

No safeguards regarding handling and storage. Photo: Vivian Grisogono

On Hvar in recent years I have managed to stop the deliveries by putting up notices round my property saying 'Otrov ne hvala' ('Poison, no thanks'), a tactic I recommend to anyone who does not want to be burdened with handling or storing hazardous substances.

My warning notice: No poisons!

Uncontrolled poison distribution is obviously hazardous. Coupled with the fact that poison is not an efficient method of controlling pests, the current policy needs to be reviewed, and practices need to be substantially improved - as a matter of extreme urgency.

© Vivian Grisogono 2016

Media

Small mammals in Wytham Woods University of Oxford
You are here: Home poisons be aware Rat poison: time to think again

Eco Environment News feeds

  • Olivier De Schutter says new economic agenda needed to tackle crises of rising inequality and ecological collapse

    The global economy must be reordered to ensure it serves ordinary people around the world rather than the “frivolous and destructive demands of the ultra-rich”, according to a leading UN figure.

    Olivier De Schutter, the UN special rapporteur on extreme poverty and human rights, says politicians must stop prioritising “socially and ecologically destructive growth” that only increases the profits – and serves the consumption demands – of the world’s richest individuals and corporations.

    Continue reading...

  • Dublin, Helsinki, Stockholm and Tallinn among port cities more choked by sulphur oxides from ferries, analysis shows

    Fume-belching ferries spew more sulphur pollution than cars in several EU capitals, analysis has found.

    Dublin, Helsinki, Stockholm and Tallinn are among 13 of Europe’s 15 biggest port cities choked more by sulphur oxides (SOx) from ferries than road vehicles, data shared exclusively with the Guardian shows.

    Continue reading...

  • Exclusive: Schemes worth hundreds of millions of pounds to protect biodiversity and oceans likely to be substantially reduced

    UK programmes to protect nature and the climate in developing countries are suffering swingeing budget cuts despite ministers’ promises, the Guardian has learned.

    The cuts belie the government’s claims to be fulfilling international obligations on climate finance and are veiled behind a system that experts have criticised as opaque.

    The cutting and partial closure of the £100m Biodiverse Landscapes Fund, intended to protect nature in vital ecosystems in poor regions overseas. Six regions were originally targeted, in Africa, South America and Asia, but this has been reduced to two.

    Coast – a project for Climate and Ocean Adaptation and Sustainable Transition – and Pact (Prepare and Accelerate Climate Transitions) are having substantial cuts.

    The future of the £500m Blue Planet Fund has been thrown into doubt despite its successful operation.

    Other schemes have been reduced in scope, for instance by allowing only one year’s funding where years were expected.

    Requests for data under the Freedom of Information Act have revealed spending has been slashed among the departments responsible for international climate finance (ICF).

    Continue reading...

  • South Australia saw most of the season’s wildest swings with January heatwaves followed by February floods

    This summer ricocheted from extremely hot to intensely wet across parts of the country, according to the Bureau of Meteorology, with South Australia experiencing some of the season’s most acute swings.

    Nationwide, the 2025-26 season was the wettest in nearly a decade, with rainfall 32% higher than average across the country, according to the bureau’s summary, the rainiest since 2016-17.

    Continue reading...

  • Storeton Wood, Wirral: Two centuries ago, this area teemed with workmen busying building Liverpool; more than 200m years ago very different creatures roamed here

    At last, the sun shone after weeks of rain. While the distant Welsh hills were draped in snow, here on the Wirral it was dry and bright. Storeton Wood is a secondary woodland of oak, beech and silver birch, and formerly a quarry. Below, a cuprous layer of leaf has protected the soil from the recent assault of raindrops. Fallen limbs were a feast of fungi; in places, creamy white Storeton sandstone peeked through like discarded vertebrae. Great spotted woodpeckers drummed.

    Standing by the remnant of George Stephenson’s quarry track, I envisaged the 1838 scene: workmen busy extracting sandstone, sudden shouts of discovery and confusion, handprints in the rock. They thought they were the signs of people perished in Noah’s flood. Victorian scientists later confirmed that they were footprints of a crocodile-like creature named Chirotherium storetonense (Chirotherium meaning “hand beast”) dating from Triassic times, 240m summers ago.

    Continue reading...

  • Insect taxonomist Art Borkent has described and named more than 300 species of midges but fears his field of science is dying out, despite millions of insects, fungi and other organisms waiting to be discovered

    Once Art Borkent starts speaking about biting midges, he rarely pauses for breath. Holding up a picture of a gnat trapped in amber from the time of the dinosaurs, the 72-year-old taxonomist explains that there are more than 6,000 ceratopogonidae species known to science. He has described and named more than 300 midges, mostly from his favourite family of flies. Some specialise in sucking blood from mammals, reptiles, other insects and even fish, often using the CO2 from their host’s breath to locate their target, he says. Tens of thousands remain a mystery to science, waiting to be discovered.

    But to Borkent’s knowledge, nobody will continue his life’s work of identifying and studying this group of flies once he has gone.

    Continue reading...

  • Warmth was result of high pressure developing across central Europe, which brought southerly winds

    The end of winter brought unseasonably high temperatures across much of Europe but particularly so in northern Spain and south-west France as numerous February temperatures records were broken.

    Cities across Nouvelle-Aquitaine and the Basque Country, including Bordeaux, Bilbao and San Sebastián, matched or exceeded their long-term February records, with temperatures of 27.1C and 27.6C recorded in Bilbao and San Sebastián on Wednesday, more than 13C above average for the time of year.

    Continue reading...

  • Though coffee is one of the world’s most important commodities, little of the profit trickles down to the farmers, while workers are abandoning the countryside in search of more lucrative jobs in the city

    Mary Luz Pérez Arrubla and her brother, Rodrigo, are fourth-generation farmers cultivating coffee on steep Andean slopes near the town of Líbano, in the rich agricultural region of Tolima. Along with the rest of Colombia, the family has enjoyed a historic harvest amid surging global coffee prices, which hit record highs for the second year in a row in 2025.

    Severe US tariffs imposed on Brazil and Vietnam, – the world’s two largest coffee producers – as well as poor harvests there, helped drive the surge. Both countries were hurt by the El Niño phenomenon, a cyclical weather pattern characterised by dry spells and aggravated by the climate crisis.

    Continue reading...

  • A new survey shows 80% of gen Zs believe strong environmental values are as important as physical attraction when it comes to finding a partner (so you might want to start reusing your coffee cups)

    Name: Green flags.

    Age: This is a thing for younger people, so listen up, boomers.

    Continue reading...

  • For months it has been adding to my mother’s distress when all she wanted was feed-in tariff payments go into her account

    When my father died last year, nearly all thecompanies we had to notify were kind and empathetic, but notScottishPower.

    It had been paying feed-in tariff (Fit) payments for electricity produced from my parents’ solar panels into his account. My parents hadbought the panels jointly in 2011, and my mother is named on the certification and was ScottishPower’s main point of contact, so she thought it would be a simple matter for the payments to be switched to her bank account. It was not.

    Continue reading...

Eco Health News feeds

Eco Nature News feeds