Ants and humane deterrents

Published in Better Ways

About ants, their varieties, some of their habits and uses, and how to remove them, if you need to, from one’s personal space without cruelty

Ants and humane deterrents kookabee, design by Melita Kukac

Friends or pests

There are enormous numbers of ants in the world, in a multitude of species (over 8,000) with varying characteristics. Members of the Formicidae family, they are related to bees and wasps (Hymenoptera order). They live in highly organized colonies, in vastly differing conditions. The proper place for ants is outside, where they can create their nests underground or in other selected safe sites to store food and provide a space for the queen ants to breed in. A queen ant is technically called a gyne.

Ants as helpers

- ants keep the environment clean by decomposing organic waste, insects and dead animals

- many ants collect and use leaf litter

- carpenter ants accelerate decomposition of dead and diseased timber

- ants improve soil drainage and chemistry: by turning and aerating the soil, they allow water and oxygen to reach plant roots; they also bring pebbles and other particles up to the top of the soil

- ants improve soil chemistry by bringing in their stores of food, enriching the soil with food and excreta; especially increasing nitrogen and phosphorus, they leave behind soil which is more or less pH neutral

- many ants disperse seeds across locations where they can flourish: they preserve the seeds by transporting them into safer nutrient rich habitats where they are protected from seed eaters, drought and fire; caches of seeds can be collected by humans when needed

- some plants are protected by ants from harmful insects, because they produce a particular nectar which the ants eat

- ants prey on pest insects and eggs – including other ants, ticks, termites, scorpions and stink bugs

- weaver ants are used as biological control in citrus cultivation, especially in China

- fire ants control pests on cultivated fields

- red wood ants help control bark beetles and caterpillars

- the large army ants prey on insects, small reptiles, birds and small mammals

- ants and ant plants: plants with with cavities (technically known as domatia if they have formed naturally) can serve as food stores or nesting places for the ants; the plants may get a supply of mineral nutrients and nitrgoen from their tenants' waste; the ants may protect the host plant from predators, whether mammals, other insects or even invasive plants such as vines

- some tropical and subtropical species of ant are totally dependent on their host plants, which in turn depend on their ant colonis to thrive

- rarely, ants are pollinators, for instance of certain orchids

- in some parts of the world certain types of ants are eaten by humans

- large ants such as army ants are used in some countries as sutures after operations

NOTE: to allow ants to do their work on and in the soil, heavy diggers should not be used to clear land for cultivation, as their weight compacts the earth into a hard mass to a significant depth. Plastic sheeting to suppress weeds also prevents ants from working in the soil.

Ants as pests

- some ants can sting, causing a variety of reactions from mild irritation ro serious allergy, according to the type of ant

- some ants protect aphids and mealybugs in order to ensure their source of high-energy honeydew: the protected mealybugs can cause problems for fruit cultivation, especially pineapples

- ants can cause damage if they choose to nest in a building or one’s home

Natural predators

- woodpeckers and other insect-eating birds

- certain types of frog

- flies

- certain fungi

- some caterpillars

- anteaters, aardvarks, pangolins echidnas, numbats

- brown bears, which especially eat carpenter ant larvae and pupae

Natural deterrents against ants

Note: the suggestions given here are based on the wide variety of personal experiences, including our own, which people have shared over the years. Always make sure that you do not use any substances, whether natural or chemical, in any way which can cause incidental harm to yourself, others, animals or the natural environment. Bear in mind that some essential oils are toxic to pets. If in doubt, seek professional advice. We accept no responsibility for misuse of the information we are sharing.

Hygiene is of course vital. To prevent ants from entering the home or to expel them, you can mix white vinegar half and half with water and use it to scrub the floors and to clean all the surfaces where the ants have appeared.

The smell of white vinegar and various essential oils such as peppermint oil, tea tree oil, cinnamon oil or neem oil are effective deterrents. You can make a spray by filling a spray bottle with water and adding a teaspoon or two of the chosen substance, and spray around where the ants have entered. Alternatively, you can soak cotton wool swabs in the substance and place them around the ant infestation. HOWEVER, PLEASE NOTE: many essential oils, especially peppermint and tea tree oil, are toxic to pets, so you should make sure pets do not come into contact with these substances.

Other methods include sprinkling used coffee grounds, pepper, Cayenne pepper, or cinnamon powder along the ant pathways, or spreading citrus peel around.

NOTE: We do not recommend killing ants.

However, for those who feel they need to, natural ant killer insecticides include borax, boric acid, cornmeal and diatomaceous earth. NOTE: diatomaceous earth has been associated with allergic skin reactions and lung problems in humans.

The Dalmatian chrysanthemum (tanacetum cinerarifolium) is a flowering plant which acts as a natural deterrent against many insects. Pyrethrum is an insecticide made from the dried flowers of the Dalmatian chrysanthemum, whose active ingredient is pyrethrin (not to be confused with the synthetic pyrethroid), which acts as a nerve agent. Pyrethrum is allowed as an insecticide in organic agriculture.

A PERSONAL EXPERIENCE: White vinegar as a deterrent, described by Nada Kozulić in Vitarnja on Hvar Island:

Ants are truly useful creatures, but are not welcome in the home. When they make their way into our living space, evicting them usually evolves into a bitter struggle, which is the more difficult if you don’t want to use chemical pesticides.

A few years ago, ants emerged from the ground to settle at the base of my front door, and proceeded to eat out part of the wooden frame to create a nest for the queen ant and her eggs. I tried various products to get rid of them and direct them to alternative lodgings – without chemical poisons – but nothing worked.

In the end I tried to remove them with a simple product which everyone has at home, alcohol vinegar, used as a spray. The smell alone was enough to send them scurrying off, and I sprayed both their nest and the pathway they took liberally. I repeated the spraying over two or three days, with the result that there were no ants at my door for the whole summer.

The following year in the middle of June I saw that they were starting to invade their previous nesting place again, so I repeated the alcohol vinegar remedy with the same result, the ants disappeared. For good measure I also spread around some pyrethrum powder. So the ants went off somewhere else, hopefully where they would not be a nuisance.

Information compiled by Nada Kozulić, Nicholas Haas, Vivian Grisogono 2022

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  • EDITOR’S NOTE:Few places on Earth are as evocative — or as imperiled — as the vast grasslands of sub-Saharan Africa. In a new Conservation News series, “Saving the Savanna,” we look at how communities are working to protect these places — and the wildlife within.

    MARA NORTH CONSERVANCY, Kenya — Under a fading sun, Kenya’s Maasai Mara came alive.

    A land cruiser passed through a wide-open savanna, where a pride of lions stirred from a day-long slumber. Steps away, elephants treaded single-file through tall grass, while giraffes peered from a thicket of acacia trees. But just over a ridge was a sight most safari-goers might not expect — dozens of herders guiding cattle into an enclosure for the night. The herders were swathed in vibrant red blankets carrying long wooden staffs, their beaded jewelry jingling softly.

    Maasai Mara is the northern reach of a massive, connected ecosystem beginning in neighboring Tanzania’s world-famous Serengeti. Unlike most parks, typically managed by local or national governments, these lands are protected under a wildlife conservancy — a unique type of protected area managed directly by the Indigenous People who own the land.

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    “It's significant income for families that have few other economic opportunities — around US$ 350 a month on average for a family. In Kenya, that's the equivalent of a graduate salary coming out of university,” said Elijah Toirai, Conservation International’s community engagement lead in Africa.

    © Jon McCormack

    Lions tussle in the tall grass of Mara North Conservancy.

    But elsewhere in Africa, the conservancy model has remained far out of reach.

    “Conservancies have the potential to lift pastoral communities out of poverty in many African landscapes. But starting a conservancy requires significant funding — money they simply don't have,” said Bjorn Stauch, senior vice president of Conservation International’s nature finance division.

    Upfront costs can include mapping out land boundaries, removing fences that prevent the movement of wildlife, eradicating invasive species that crowd out native grasses, creating firebreaks to prevent runaway wildfires, as well building infrastructure like roads and drainage ditches that are essential for successful safaris. Once established, conservancies need to develop management plans that guide their specified land use for the future.

    Conservation International wanted to find a way for local communities to start conservancies and strengthen existing ones. Over the next three years, the organization aims to invest millions of dollars in new and emerging conservancies across Southern and East Africa. The funds will be provided as loans, which the conservancies will repay through tourism leases. This financing will jumpstart new conservancies and reinforce those already in place. The approach builds on an initial model that has proven highly effective and popular with local communities.

    “We’re always looking for creative new ways to pay for conservation efforts that last,” Stauch said. “This is really a durable financing mechanism that puts money directly in the pockets of those who live closest to nature — giving them a leg up. And it’s been proven to work in the direst circumstances imaginable.”

    © Will McCarry

    Elijah Toirai explains current conservancy boundaries and potential areas for expansion.

    Creativity from crisis

    In 2020, the entire conservancy model almost collapsed overnight.

    “No one thought that the world could stop in 24 hours,” said Kelvin Alie, senior vice president and acting Africa lead for Conservation International. “But then came the pandemic, and suddenly Kenya is shutting its doors on March 23, 2020. And in the Mara, this steady and very well-rounded model based on safari tourism came to a screeching halt.”

    Tourism operators, who generate the income to pay landowners' leases, found themselves without revenue. Communities faced a difficult choice: replace the lost income by fencing off their lands for grazing, converting it to agriculture, or selling to developers — each of which would have had drastic consequences for the Maasai Mara’s people and wildlife.

    © Will Turner

    A black-backed jackal hunts for prey.

    “But then the nature finance team at Conservation International — these crazy guys — came up with a wild idea,” Alie said. “In just six months they put this entirely new funding model together: loaning money at an affordable rate to the conservancies so that they can continue to pay staff and wildlife rangers.”

    Conservation International and the Maasai Mara Wildlife Conservancies Association launched the African Conservancies Fund — a rescue package to offset lost revenues for approximately 3,000 people in the area who rely on tourism income. Between December 2020 and December 2022, the fund provided more than US$ 2 million in affordable loans to four conservancies managing 70,000 hectares (170,000 acres).

    The loans enabled families in the Maasai Mara to continue receiving income from their lands to pay for health care, home repairs, school fees and more. And because tourism revenues — not government funding — support wildlife protection in conservancies, this replacement funding ensured wildlife patrols continued normally, with rangers working full time.

    Born out of this emergency, we discovered a new way to do conservation.

    Elijah Toirai

    “The catastrophe of COVID-19 was total for us,” said Benard Leperes, a landowner with Mara North Conservancy and a conservation expert at Maasai Mara Wildlife Conservancies Association. “Without Conservation International and the fund, this landscape would have not been secured; the conservancies would have disintegrated as people were forced to sell their land to convert it to agriculture.”

    But it was communities themselves that proved the model might be replicable after the pandemic ended.

    “The conservancies had until 2023 before the first payment was due,” Toirai said. “But as soon as tourism resumed in mid-2021, the communities started paying back the loans. Today, the loans are being repaid way ahead of schedule.”

    “Born out of this emergency, we discovered a new way to do conservation.”

    A new era for conservation

    The high plateaus overlooking the Maasai Mara are home to the very last giant pangolins in Kenya.

    These mammals, armored with distinctive interlocking scales, are highly endangered because of illegal wildlife trade. In Kenya, threats from poaching, deforestation and electric fences meant to deter elephants from crops have caused the species to nearly disappear. Today, scientists believe there could be as few as 30 giant pangolins left in Kenya.

    Conservancies could be crucial to bringing them back. Conservation International has identified opportunities to provide transformative funding for conservancies in this area — a sprawling grassland northwest of Maasai Mara that is the very last pangolin stronghold in the country. The fund will help communities better protect an existing 10,000-hectare (25,000-acre) conservancy and bring an additional 5,000 hectares under protection. It provides a safety net, ensuring a steady income for the communities as the work of expanding the conservancy begins. With a stable income, communities can start work to restore the savanna and remove electric fences that have killed pangolins. And as wildlife move back into the ecosystem, the grasslands will begin to recover.

    In addition to expanding conservancies around Maasai Mara, Conservation International has identified other critical ecosystems where community conservancies can help lift people out poverty, while providing new habitats for wildlife. Conservation International has ambitious plans to restore a critical and highly degraded savanna between Amboseli and Tsavo National Parks in southern Kenya, as well as a swath of savanna outside Kruger National Park in South Africa.

    © Emily Nyrop

    A lone acacia tree in a sea of grass.

    Elephants, fire, Maasai and cattle

    Many of the new and emerging community conservancies have been carefully chosen as key wildlife corridors that would be threatened by overgrazing livestock.

    When the first Maasai Mara conservancies were established in 2009, cattle grazing was prohibited within their boundaries. When poorly managed, cattle can wear grasses down to their roots, triggering topsoil erosion and the loss of nutrients, microbes and biodiversity vital for soil health. It was also believed that tourists would be put off by the sight of livestock mingling with wildlife.

    © Emily Nyrop

    Cattle are closely monitored in the Maasai Mara to prevent overgrazing.

    However, over the years, landowners objected, lamenting the loss of cultural ties to cattle and herding. “That was when we changed tactics,” said Raphael Kereto, the grazing manager for Mara North Conservancy.

    Beginning in 2018, Mara North and other conservancies in the region started adopting livestock grazing practices to restore the savanna. Landowners agreed to periodically move livestock between different pastures, allowing grazed lands to recover and regrow,  mimicking the traditional methods pastoralists have used on these lands for hundreds, if not thousands, of years.

    “Initially, there was a worry that maybe herbivores and other wildlife will run away from cattle,” said Kereto. “But we have seen the exact opposite — the wildlife all follow where cattle are grazing. This is because we have a lot of grass, and all the animals follow where there is a lot of grass. We even saw a cheetah with a cub that spent all her time rotating with wildlife.”

    “It's amazing — when we move cattle, the cheetah comes with it.”

    The loans issued by the fund — now called the African Conservancies Facility — will enhance rotational grazing systems, which are practiced differently in each conservancy, by incorporating best practices and lessons from the organization’s Herding for Health program in southern Africa.

    © Will Turner

    An elephant herd stares down a pack of hyenas.

    For landowners like Dickson Kaelo, who was among the pioneers to propose the conservancy model in Kenya, the return of cattle to the ecosystem has restored a natural order.

    “I always wanted to understand how it was that there was so much more wildlife in the conservancies than in Maasai Mara National Reserve,” said Kaelo, who heads the Kenya Wildlife Conservancy Association, based in Nairobi.

    “I went to the communities and asked them this question. They told me savannas were created by elephants, fire and Maasai and cattle, and excluding any one of those is not good for the health of the system. So, I believe in the conservancies — I know that every single month, people go to the bank and they have some money, they haven't lost their culture because they still are cattle keepers, and the land is much healthier, with more grass, more wildlife, and the trees have not been cut.

    “For me, it’s something really beautiful.”


    Further reading:

    Will McCarry is the content director at Conservation International. Want to read more stories like this? Sign up for email updates. Also, please consider supporting our critical work.

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