Pest identification
What's eating my elephant foot yam?
Aphids
Signs: Colonies on young petioles and the underside of the compound leaf; honeydew leads to sooty mould.
Control: Spray with insecticidal soap or neem oil; encourage ladybirds and lacewings; remove heavily infested shoots.
Caterpillars (Spodoptera spp. / armyworms)
Signs: Large irregular holes in the leaf blade; entire leaflets stripped in severe outbreaks.
Control: Hand-pick egg masses and caterpillars; apply Bt (Bacillus thuringiensis) spray in the evening when larvae are active.
Wireworms
Signs: Tunnels and channels bored into the corm, reducing yield and creating entry points for rot pathogens.
Control: Rotate crops; dig soil thoroughly before planting; use entomopathogenic nematodes (Steinernema feltiae) as a soil drench.
Slugs & Snails
Signs: Shredded or missing tissue on young emerging leaves at soil level, especially in rainy weather.
Control: Apply iron phosphate pellets; mulch with sharp grit; hand-pick in the evening after rain.
Keep elephant foot yam pest-free
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Elephant Foot Yam pests — FAQ
What is eating my elephant foot yam?
Elephant Foot Yam grown as an edible crop faces aphids on fresh shoots, caterpillars that skeletonise or perforate the large leaf, and corm-feeding pests like wireworms in the soil. In damp tropical garden beds, slugs and snails damage emerging growth. Aphids are the most consistently reported above-ground pest.
How do I get rid of aphids on elephant foot yam?
Colonies on young petioles and the underside of the compound leaf; honeydew leads to sooty mould. Spray with insecticidal soap or neem oil; encourage ladybirds and lacewings; remove heavily infested shoots.
How do I get rid of caterpillars (spodoptera spp. / armyworms) on elephant foot yam?
Large irregular holes in the leaf blade; entire leaflets stripped in severe outbreaks. Hand-pick egg masses and caterpillars; apply Bt (Bacillus thuringiensis) spray in the evening when larvae are active.
How do I get rid of wireworms on elephant foot yam?
Tunnels and channels bored into the corm, reducing yield and creating entry points for rot pathogens. Rotate crops; dig soil thoroughly before planting; use entomopathogenic nematodes (Steinernema feltiae) as a soil drench.
How do I get rid of slugs & snails on elephant foot yam?
Shredded or missing tissue on young emerging leaves at soil level, especially in rainy weather. Apply iron phosphate pellets; mulch with sharp grit; hand-pick in the evening after rain.