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Identifying aphids on Sunflower
Clusters of small green or black insects on the underside of leaves and around the developing flower head, often with sticky honeydew nearby.
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Life cycle
Reproduce rapidly without mating in spring/summer. One female can produce 80+ offspring per week. Multiple generations per year.
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Damage to Sunflower
Aphids sap-suck on leaves and the developing flower head, potentially reducing seed production and coating leaves in honeydew that attracts sooty mould.
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How to treat aphids on Sunflower
Spray forcefully with water to dislodge aphids, or apply insecticidal soap for persistent infestations. Encourage ladybirds, which are highly effective on sunflowers.
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Preventing aphids on Sunflower
Inspect the undersides of leaves and around the developing flower bud regularly, and encourage beneficial insects in the garden.