Des(s)ert locusts: researchers are working on insect-based oils
They are trying to make cooking oil from desert locusts (schistocerca gregaria).
The Cameroonian entomologist Chrysantus Tanga is a fan. "As a child I caught locusts for fun and ate them straight away," he says. "They are so beautifully crunchy." Tanga works in Kenya's capital Nairobi for the International Centre of Insect Physiology and Ecology (ICIPE), a pan-African research institute.
For more than 20 years the institute has been breeding desert locusts for research purposes.
Desert locusts are healthy
Tanga and his colleagues have discovered that insect oils, for example from desert locusts, contain more omega-3 fatty acids, vitamin E and antioxidants than vegetable oils. According to the researchers, they are safe for human consumption.
But some dark breads already have a pleasant nutty taste. The demand for insect products could be especially great in Africa, with its rapid population growth as well as the risks of food shortages.
The first thing people tend to associate with desert locusts is a plague. Since the end of 2019, huge swarms of the insects have been migrating over East Africa. Kenya, Ethiopia, and Somalia have been hit the hardest.
When the locust swarms come farmers and herders can only watch on helplessly as the insects destroy their fields and pastures. Their livelihood is acutely threatened by these events.
So why not just capture the swarms and turn the pests into oil? This isn't very practical, according to insect expert Tanga. "The insects migrate, often to inaccessible or even dangerous areas. We cannot reliably predict when they will be found where and in what numbers."
Xavier Cheseto, his colleague, also warns that the locusts could have been sprayed with pesticides, which could make them dangerous for human consumption.
Breeding is environmentally friendly
Insects could be used in a lot of different types of food
In sub-Saharan Africa, insects have always been part of the human diet. More than 500 insect species are consumed on the continent. Now, an increasing number of researchers are trying to develop food from insects suitable for the modern diet. Soap and biofuel could also be made from them.
ICIPE is currently negotiating with African governments and private companies to make its research results applicable and to promote an insect-based industry. According to the institute, there are already more than 50 companies in Kenya currently producing insect-based animal feed.
Nutritional scientist John Kinyuru from the Jomo Kenyatta University in Nairobi praises the nutritional value of locust oil. He says there's a lot of interest in moving to the stage of industrial production. "Currently, there are not enough farmers producing the insects in sufficient quantities," he says.
He finishes with a warning: "You have to be extremely careful that the locusts don't break out: otherwise you'll create a plague."
Cover photo: Mauricio Acosta/123RF