A gerbil invasion, especially in a grassland or savannah, can lead to serious crop damage. Control begins with understanding the behaviour of this pest, and should always be environmentally sensitive.
Gerbils of the genera Gerbilliscus, Desmodillus and Tatera are mostly found in the drier areas of South Africa’s grassland, savannah, Karoo and fynbos biomes. They are small rodents with shortish tails and long hind legs. Their droppings are small, oblong and spiked, and can easily go unnoticed.
As burrowing animals, gerbils prefer clay soils due to the cracks that typically form in them during the dry season.
Gerbil populations sometimes grow dramatically, with figures of 40 000 animals per hectare being reported. They can cause extensive crop damage by burrowing in the land as well as consuming freshly planted and germinating seed, and the ripening crop.
To manage gerbils effectively, it is necessary to understand their population dynamics and why they invade croplands.
• Food supply
Newly planted crops and crop residue offer a year-round food supply. There is no way of getting around this.
• Continual monoculture cropping
Given the demand for grain, farmers tend to make maximum use of all their arable land for a single crop species. This creates a highly favourable habitat for gerbils.
• Climate change
There is strong evidence that South Africa’s summer season is shifting to later in the calendar. Later rain gives gerbils a better chance of survival.
Diese Geschichte stammt aus der Farmer's Weekly 17 August 2018-Ausgabe von Farmer's Weekly.
Starten Sie Ihre 7-tägige kostenlose Testversion von Magzter GOLD, um auf Tausende kuratierte Premium-Storys sowie über 8.000 Zeitschriften und Zeitungen zuzugreifen.
Bereits Abonnent ? Anmelden
Diese Geschichte stammt aus der Farmer's Weekly 17 August 2018-Ausgabe von Farmer's Weekly.
Starten Sie Ihre 7-tägige kostenlose Testversion von Magzter GOLD, um auf Tausende kuratierte Premium-Storys sowie über 8.000 Zeitschriften und Zeitungen zuzugreifen.
Bereits Abonnent? Anmelden
New farmers' seedling pitfalls
Inexperienced farmers may be tempted to grow seedlings from seed themselves, but they have much to gain by trusting a seedling grower at a nursery to perform this task for them instead
South African avocado production: a success story
Avocado production in South Africa has expanded markedly since the industry's humble beginnings over 80 years ago. From a small grove planted in 1938 in what was then Nelspruit, the industry has blossomed to seven million trees planted on 20 000ha. Dr Guy Witney, project manager at Great Brak Avos, spoke to Annelie Coleman about the country's avocado production.
Unlocking value through livestock exports
Exporting livestock might sound like a daunting business that's better left for big companies, but Gerrie Ferreira, who farms near Oudtshoorn in the Western Cape, has been doing it successfully for almost 30 years, sometimes in partnership with other breeders. He spoke to Glenneis Kriel about the huge potential this market holds, and offers some advice for farmers who are contemplating going this route.
An agribusiness's dedication to community upliftment
For agribusiness NWK, located in Lichtenburg, North West, corporate social investment is an important part of creating a positive influence alongside financial returns. Johan Bezuidenhout, NWK’s group manager of corporate marketing and communication, spoke to Annelie Coleman about why the company chooses to invest millions of rands in the area it operates in every year.
Empowering dreams, transforming lives
Since its launch in 2013, the Agri's Got Talent competition has revolutionised the lives of many farmworkers by unlocking their hidden talents and fostering a culture of empowerment. Glenneis Kriel spoke to various finalists about how the contest has changed their lives.
Foreign investment: agriculture maintains its appeal
South Africa remains a popular destination for foreign investors, despite an often negative outlook from its citizens. It is a gateway to Africa, and with its counterseasonal production to the Northern Hemisphere and favourable weather, local agriculture is especially well placed to attract foreign interest, bringing with it hope for rural communities
The real value and message of COP29 for SA agriculture
While the 2024 Conference of the Parties may have disappointed those who hoped for real progress, it's more important for South African agriculture to highlight its role in carbon mitigation
Improving efficiencies in feed and grain milling
Bühler, a Swiss-based company that provides solutions and equipment for various industries, including food and animal feed processing, has pledged that by 2025, it will deliver scalable solutions that will reduce energy, waste and water by 50% in the value chains of its customers.
Tips for better olive production
At an SA Olive Association field day in November, industry experts shared ways to improve olive production efficiencies, from soil preparation to harvesting.
More effort needed to protect vulnerable cheetah
On International Cheetah Day, commemorated every year on 4 December, emphasis was placed on the vulnerability of the species.