By Staff Reporter
POLOKWANE-An outbreak of the African armyworm (Spodoptera exempta) has raised concern across several provinces in South Africa, including Limpopo.
The infestation has been particularly severe in areas such as Groblersdal, Carolina, Badplaas, Pretoria North, and Bronkhorstpruit.
These pests, known for their voracious appetite, can devastate crops and pose significant threats to both agriculture and livestock.
The African armyworm is a migratory pest that primarily feeds on grasses but can also cause substantial damage to crops such as maize and millet.
While they tend to prefer grasses, the armyworms can rapidly spread and overwhelm farmlands, particularly those with valuable pasture or grain crops. Infestations can lead to crop loss, decreased yield, and in severe cases, the collapse of entire fields.
One of the significant concerns in Limpopo is the threat the armyworm poses to pastures. Grasses like kikuyu are particularly vulnerable to attack.
When these plants are consumed by the armyworm, they may release cyanide-like compounds, which can be toxic to livestock, particularly cattle.
Farmers who rely on grazing lands need to be especially vigilant in monitoring their pastures for signs of infestation to prevent poisoning in their herds.
To combat the armyworm outbreak, farmers have a range of control methods available.
Chemical control is one option, with synthetic pyrethroid insecticides being a common solution.
However, the widespread nature of the infestation means that chemical control may not always be cost-effective, especially when large areas need treatment. Moreover, reliance on chemical solutions can lead to environmental concerns and the potential for resistance over time.
On the other hand, natural predators, such as migratory birds, play a significant role in managing armyworm populations.
Farmers are encouraged to consider integrated pest management strategies, which combine both chemical and natural control methods, depending on the severity of the infestation.
Farmers are urged to stay vigilant and report any suspected armyworm sightings. Timely reporting is crucial in mitigating the impact of the outbreak and allowing for a more coordinated response.
To aid in the identification and monitoring of armyworm populations, farmers can send images and location details to CropLife South Africa. Dr. Gerhard Verdoorn (082 446 8946) and Hiresh Ramanand (082 497 6975) are available on WhatsApp for reporting.
