Eco Hvar

Mravi i humano rješenje

Objavljeno u Priroda zna bolje!

O mravima i vrstama mrava, uz opis njihovih uloga i kako njih riješiti, ako treba, na human način

Mravi i humano rješenje kookabee, design by Melita Kukac

MRAVI: Prijatelji ili štetočine?

Na svijetu je nevjerojatan broj mrava, raznih vrsta s različitim karakteristikama. Članovi su porodice Formicidae, te potičući iz reda Hymenoptera (opnokrilci) srodni su pčelama i osama. Žive u vrlo organiziranim kolonijama, u mnogim potpuno različitim uvjetima, no pravo mjesto za mrave je na otvorenom. Tamo rade svoja gnijezda pod zemljom ili na drugim odabranim sigurnim mjestima kako bi skladištili hranu i osigurali prostor za razmnožavanje kraljica.

Mravi kao pomagači:

- mravi održavaju okoliš čistim razgrađujući organski otpad, insekte i mrtve životinje

- mnogi mravi sakupljaju i koriste otpad od lišća

- mravi stolari ubrzavaju razgradnju mrtvog i bolesnog drveta

- mravi poboljšavaju drenažu tla: okretanjem i prozračivanjem tla omogućuju da voda i kisik dopru do korijena biljaka; također donose kamenčiće i druge čestice do vrha tla

- mravi poboljšavaju i kemiju tla unoseći svoje zalihe hrane, obogaćujući tlo hranom i izlučevinama; posebno tako povećavaju dušik i fosfor, čime ostavljaju za sobom tlo koje je više-manje pH neutralno

- mnogi mravi raspršuju sjeme na mjesta gdje mogu cvjetati: čuvaju sjeme prenoseći ga u sigurnija staništa bogata hranjivim tvarima gdje su zaštićeni od žderača sjemenja, suše i požara; ljudi mogu sakupljati ta spremišta sjemena kada je to potrebno

- neki mravi štite biljke koje proizvode poseban nektar od drugih insekata koji bi im mogli naštetiti.

- mravi love insekte štetočine i njihova jajašca – uključujući druge mrave, krpelje, termite, škorpione i smrdibube

- mravi tkalci koriste se kao biološka kontrola u uzgoju citrusa, posebno u Kini

- vatreni mravi suzbijaju štetnike na obrađenim poljima

- šumski mravi pomažu u suzbijanju potkornjaka i gusjenica

- u rijetkim slučajevima mravi mogu biti oprašivači, na primjer nekih orhideja

- u nekim dijelovima svijeta ljudi jedu određene vrste mrava

- u nekim se zemljama veliki mravi, kao što su vojnički mravi, koriste umjesto šavova nakon operacija

Mravi kao štetočine
- neki mravi grizu, što može uzrokovati razne reakcije od blage iritacije do ozbiljne alergije, ovisno o vrsti mrava
- neki mravi štite biljne uši i brašnaste stjenice kako bi si osigurali izvor visokoenergetskog cvjetnog meda: zaštićene brašnaste stjenice mogu uzrokovati probleme u uzgoju voća, osobito ananasa

- mravi mogu biti štetni ako se odluče ugnijezditi u zgradi ili nečijem domu

Prirodni predatori

- djetlići i druge ptice koje se hrane kukcima

- određene vrste žaba

- muhe

- određene gljive

- neke gusjenice

- mravojedi, ljuskavci, ješci i numbati

- smeđi medvjedi, koji prvenstveno jedu ličinke i kukuljice mrava stolara

Prirodna sredstva protiv mrava

Higijena je naravno ključna. Kako bi ste spriječili ulazak mrava u dom ili ih istjerali, možete pomiješati bijeli ocat pola-pola s vodom i njime oribati sve površine na kojima su se mravi pojavili.

Mirisi bijelog octa i raznih eteričnih ulja poput paprene metvice, ulja čajevca, ulja cimeta ili ulja nima, učinkovita su sredstva protiv mrava. Vlastiti sprej možete napraviti tako da napunite špricaljku s vodom i dodate žličicu-dvije odabrane tvari te poprskate oko mjesta kuda su mravi ušli. Alternativno, možete namočiti štapiće od vate u sredstvo i postaviti ih oko najezde mrava. NAPOMENA: imajte na umu da su mnoga eterična ulja, posebice ulje paprene metvice i čajevca, otrovna za kućne ljubimce, pa osigurajte da oni ne dođu u kontakt s tim tvarima.

Ostale metode uključuju posipanje taloga kave, papra, kajenskog papra ili cimeta u prahu po putevima mrava ili postavljanje kore citrusa oko njih.

NAPOMENA: Ne preporučujemo ubijanje mrava.

Međutim, za one koje to ipak žele, prirodni insekticidi uključuju boraks, bornu kiselinu, kukuruzno brašno i kremenu zemlju.

NAPOMENA: kremena ili dijatomejska zemlja povezuje se s kožnim alergijskim reakcijama i problemima s plućima kod ljudi.

NADA KOZULIĆ: JEDNO OSOBNO ISKUSTVO

Kako riješiti mrave koji su ušli u prostor bez otrova i bez ubijanja.

Mravi su vrlo korisna stvorenja, ali ne u našoj kući ili stanu. A kad nam „usele“ u stambeni prostor, počinje ogorčena borba kako ih se riješiti, pogotovo ako ne želite ni mrave, a posredno ni sebe, trovati raznim otrovima.

Pred nekoliko godina mravi iz zemlje odlučili se smjestiti u dnu ulaznih vrata, čak su pojeli jedan dio gdje su smjestili maticu i njena jaja. Probala sam različita sredstva (osim otrova) da ih otjeram i da ih usmjerim drugamo, gdje bi stvorili novo stanište.

Na kraju pokušala sam ih se riješiti jednostavnim sredstvom koje ima svatko u kući – alkoholnim octom. Čim su osjetili miris octa počeli su bježati, dobro sam prskala  octom tu „cestu“ kojom su se kretali kao i njihovo stanište. Ponovila sam to idućih 2 – 3 dana i cijelo ljeto bila mirna.

Sljedeće godine, sredinom lipnja opet sam vidjela da su krenuli prema starom staništu, ponovila sam tretman alkoholnim octom i rezultat je bio isti, mravi su nestali. Još sam posipala prahom buhača, za svaki slučaj. Mravi su otišli negdje drugdje gdje ne smetaju.

Informacije sastavili Nada Kozulić, Nicholas Haas i Vivian Grisogono, 2022.

Prijevod: Josip Vlainić

 

Više u ovoj kategoriji: « Eko-friendly smještaj na Hvaru! Komarci: prijatelji ali i štetočine? »
na vrh članka
Nalazite se ovdje: Home članci o zdravlju Priroda zna bolje! Mravi i humano rješenje

Novosti: Ekologija.hr

  • Severe drought declared in six areas of England as reservoirs run low

    Some reservoirs in south at critical levels as water companies call for extended restrictions that would affect golf clubs, private schools and car washes

    A severe drought has been declared in six areas of England, with some reservoirs at critically low levels, threatening public supplies.

    Parts of Devon, Cornwall, Dorset, Somerset, East Sussex and West Sussex have moved into severe drought, and urgent measures are being taken to secure public supplies of water after the UK experienced its hottest summer on record.

    Continue reading...

  • ‘I am still a child, it cannot be good to be married’: how drought forces Afghan families to sell girls as brides

    As climate breakdown pushes families to starvation, many feel forced to ‘sacrifice’ daughters to save siblings. Photographer Elise Blanchard travelled the country speaking to girls as young as eight, 10 and 14 who have been engaged or married to repay debts or pay for food

    ‘I’m not happy about this,” says 11-year-old Khatira, who was sold into marriage to repay debts, sitting in her home in Qala-e-Naw, capital of Badghis province in north-west Afghanistan. “She was healthy before her engagement, now she is worried and cries a lot,” says her 40-year-old mother, Noor Bibi.

    When her 20-year-old husband-to-be comes to her home, Khatira runs away. Since her engagement, she has stopped going outside because she “is ashamed of having a husband in front of the other girls”, says her mother.

    Shepherds watch over their sheep in the hills of Bala-Murghab, Badghis province, north-west Afghanistan. By March, the pasture was already too dry for the season

    Continue reading...

  • A perfect storm: how the super El Niño is devastating the fishing industry

    Peru’s anchoveta have made up about a 10th of the entire global commercial fishing catch since 1970, more than any other fish. A combination of warming seas and decades-long overfishing spells disaster

    On 10 June 2026, the government of Peru made a decision that it knew would hurt one of the world’s major fishing industries. It stoppedall anchoveta fishing boats from going out to sea, suspending the fishing season. At first the order was temporary, but in mid-August, the suspension turned into a total closure. This was no easy call. For one thing, it was a brutal blow to the Peruvian economy.

    Peruvian anchovies – the scientific name is Engraulis ringens – are not the salty, punch-packing little fillets in a puttanesca sauce or caesar salad dressing. That is a different species – Engraulisencrasicolus – which is smaller, tastier and found mostly in the eastern Atlantic and the Mediterranean. Only a small part of Peru’s anchoveta catch is eaten in fish form. The rest – more than 90% – is immediately processed as fishmeal and fish oil, packed in sacks and barrels, and shipped to fish, shellfish and seaweed farms, factory farms and nutritional supplement producers around the world.

    Continue reading...

  • No timeline for lifting Land Registry paywall as ownership remains opaque

    Defra promised in March to work towards free access to data on large plots in England and Wales

    The government has refused to say when the public will be able to freely access information about who owns large plots of land across England and Wales.

    Emma Reynolds, the previous secretary of state for the environment, announced in March that the paywall protecting large amounts of the Land Registry would be partly lifted.

    Continue reading...

  • ‘Like selling wolves from Yellowstone’: how protected US sharks are being sold off to foreign aquariums

    While anglers cannot take endangered sand tiger sharks, a loophole lets private firms catch the fish to sell abroad, profiting from Delaware Bay’s conservation success

    Shortly after 12.45pm, what remains of a 300-metre line goes taut. Somewhere beneath the murky green surface of Delaware Bay, on the eastern US coast, a sand tiger shark has taken the bait of a mackerel chunk. Marine researchers at the University of Delaware haul the line towards a small boat as the shark’s grey-brown outline emerges.

    It is a large animal: 225cm (7ft) long with a 90cm girth. Its mouth hangs open, revealing rows of jagged teeth. The researchers work quickly, measuring the shark, recording its sex, and taking blood and muscle samples. A tag is then fastened beneath its dorsal fin, through its thick sandpapery skin.

    Continue reading...

  • Mont Blanc, the ‘roof of Europe’, loses more than a metre of height in a year

    Peak of French mountain now 4,807 metres high and fluctuates year by year due to changes in Alpine climate

    Western Europe’s highest mountain shrank by more than a metre last year. The peak of Mont Blanc in France now stands 4,807.47 metres above sea level, a team of surveyors said on Wednesday, putting “the roof of Europe” 1.29 metres lower than in 2025.

    The mountain is about 4,792 metres tall but the summit constantly shifts as heat, wind and precipitation change the thickness of snow and ice on top. The height scientists recorded during an expedition last month was 1.88 metres greater than it was in 2023, when it reached the lowest levels in recent memory.

    Continue reading...

  • Country diary: Thrilled by Darwin, and the wonder of worms | Lev Parikian

    Downe, Kent: It’s hard not to feel the earth move by a visit to the great man’s house. He truly valued these creatures of the dirt

    The garden beds are moistened by steady rain, but the ground is still unyielding. A blackbird hops across bare soil. A dart, a jab, and up it comes – a wriggling tube of pink flesh. A simple catch. But when I rummage in the dirt, my only reward is loam under the fingernails. Perhaps I should have brought a bassoon.

    I’ve come to Down House. Here, Charles Darwin changed the world. And here he wrote his last book, its title usually shortened for convenience: Earthworms.

    Continue reading...

  • The hidden costs of fracking: boom in Argentina linked to trail of sickness

    Families in Vaca Muerta, the centre of Patagonia’s shale operation, report cancers, miscarriages and pollution

    In Allen, a small town in Argentine Patagonia, many people living on the same street ended up falling ill. For some, it was severe migraines, nausea or skin irritation. For others, cancers, congenital abnormalities, miscarriages or stillbirth seemed to affect foetuses or children. People say it all started 13 years ago – when a well was drilled near their homes to extract gas and oil.

    Calle Ciega 10 [Dead-end Street 10] lies on the eastern edge of Vaca Muerta, a vital area for Argentina’s economy, home to the world’s second-largest reserve of shale gas and fourth-largest reserve of shale oil. The region has more than 2,600 active wells, including one on this small street where about 20 families live, most of them seasonal workers on fruit farms.

    Continue reading...

  • From black soldier flies to mealworms: farming insects for food, fodder and fertiliser in Uganda

    Cultivating the nutritious bugs means families can raise livestock and enrich their own food, while lowering pressures on the land

    A few minutes’ walk from his home in the Kyaka II refugee settlement, Kanane Bikanyale feeds black soldier fly larvae to chickens in a coop above a fishpond. The larvae disappear in a scrum of chickens. Nearby, more larvae grow in modified jerrycans, while adult flies are kept in netted boxes.

    Bikanyale kept chickens before he fled to Uganda from the Democratic Republic of the Congo (DRC). But the cost of conventional feed and shortages of ingredients made them increasingly difficult to raise – a widespread pressure for millions of smallholder farmers whose margins are tight.

    Kanane Bikanyale tends to his black soldier fly larvae in a rearing unit in the Kyaka II refugee camp in Uganda

    Continue reading...

  • Is the modern economic system broken? These urban beekeepers think so – and this is their solution

    At Bybi in Copenhagen, a dedicated group of staff and volunteers have built a community for all centred on the production of honey – much of which is given away for nothing. Could it be replicated elsewhere?

    The bees at Bybi, a collective of beekeepers in Copenhagen, live on the roof. Their home is a complex of Victorian buildings, right in the centre of the city, that looks like an idealised vision of the modern social enterprise, ennobled by the architecture of the past. It’s a place of cottage industry in concert with nature, where the marginalised are brought in from the fringes and corporations stand waiting to help, where jobs happen but a lot of the work is done by volunteers, and where – this bit is important – a lot of time is spent discussing ideas.

    Oliver Maxwell, Bybi’s 48-year-old founder, encourages me to examine the buildings more closely. They were once a prison, a workhouse and a hospital; their functions today – a homeless shelter, a young offender institution and, until recently, a job centre – are not so different. Denmark’s Victorian transformation, from “agricultural backwater to industrialised agriculture”, was reflected in how they treated people, Maxwell says.

    Continue reading...

Novosti: Cybermed.hr

Novosti: Biologija.com

Copyright © 2026 Eco Hvar. Sva prava zadržana. Developed by Orion Informatika.