Astylus Beetle

About this pest

Astylus Beetle: Spotted Menace in South African Gardens

The Astylus beetle, with its distinctive black body and pale patches, might seem harmless at first glance. However, these little critters can quickly become a nuisance in South African gardens and agricultural fields. Let’s delve into their world to understand the why and how:

Physical Characteristics:

• Size: Roughly oval-shaped, about 12mm long and 5mm wide.
• Colour: Black body with pale hairs on the pronotum and two large, eye-like black dorsal patches.
• Texture: Soft and leathery body with finely bristly and punctured elytra.
• Movement: Sluggish early in the morning and evening, but becomes more active and can fly readily during the day.

Common South African Names:

• Gespikkelde mieliebies kewers: Afrikaans, meaning “spotted maize beetle”
• Stuifmeel kewers: Afrikaans, meaning “pollen beetle”

Why is the Astylus Beetle a Pest?

• Pollen and nectar feeders: While mainly harmless, they gather pollen and nectar from various flowers, fruits, and crops, potentially reducing yields in some cases.
• Unintentional damage: In their search for food, they can damage fruit and plant tissues, leaving blemishes and scars.
• Potential pest vector: Some research suggests a possible role in transmitting plant diseases, though information is limited.

Combatting Astylus Beetles:

• Physical barriers: Netting over crops or valuable plants can be an effective deterrent.
• Handpicking: Removing beetles manually is feasible for limited infestations.
• Insecticidal soap spray: Can be effective for smaller outbreaks, but reapplication might be needed.
• Chemical insecticides: Use insecticides registered for control of beetles if necessary, but prioritize natural methods and consider environmental impact.
• Attracting natural predators: Encourage birds, wasps, and other insect predators in your garden to help control population numbers.

Remember:

• Astylus beetles are primarily pollen feeders and their pest status is relatively minor compared to other garden insects.
• Always assess the level of damage and consider the potential benefits of these beetles before resorting to control measures.
• Prioritize natural and organic methods whenever possible to maintain a healthy garden ecosystem.

By understanding the Astylus beetle and choosing appropriate control methods, you can manage their presence without harming beneficial insects and the overall balance of your South African garden paradise.