American Bollworm

About this pest

American Bollworm: A Multifaceted South African Menace

The American Bollworm, despite its misleading name, poses a serious threat to South African gardens and orchards. This adaptable pest, sometimes called the “Boor wurm”, “Fruit borer” “African Bollworm” or “Corn earworm,” is a master of disguise, affecting a wide range of plants beyond cotton.

Physical Appearance:

Larvae: The culprits are plump, greenish caterpillars with faint stripes and dark spots. They grow up to 1.5 inches long and can be surprisingly active, wriggling out when disturbed.

Adults: Moth-like creatures with brown wings marked with white and light brown patterns. They’re nocturnal, making them harder to spot.

Why it’s a Pest:

Destructive larvae: They burrow into flowers, fruits, and even vegetables, causing premature drop, rot, and stunted growth. Hibiscus, bougainvillea, tomatoes, mangoes, and pomegranates are just a few of their South African victims.

Hidden damage: Their burrowing habit often hides the initial attack, making it easy to miss infestations until it’s too late.

Multiple generations: Breeding year-round in warm climates like South Africa, they produce several generations per year, multiplying the damage potential.

Combating the Bollworm:

• Natural predators: Encourage birds, wasps, and parasitic insects in your garden to keep populations in check.
• Cultural practices: Interplant with pest-repellent herbs like basil or marigolds, rotate crops regularly, and remove plant debris after harvest.
• Handpicking: Carefully remove and dispose of caterpillars you find.
• Traps: Pheromone traps can attract and lure away adult moths before they lay eggs.
• Organic sprays: Bacillus thuringiensis (Bt) or neem oil-based sprays can be effective against young larvae without harming beneficial insects.

By understanding the American Bollworm’s crafty ways and employing these eco-friendly methods, you can protect your precious South African garden from this adaptable pest and reap the rewards of your hard work!