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Identifying whiteflies on Cosmos
Tiny white moth-like insects that fly up in clouds when plants are disturbed.
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Life cycle
Eggs laid on leaf undersides. Multiple generations per year. Thrive in warm temperatures.
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Damage to Cosmos
Sap-sucking causes yellowing. Honeydew and sooty mould. Transmit viral diseases.
healing
How to treat whiteflies on Cosmos
Yellow sticky traps. Insecticidal soap or neem oil. Introduce Encarsia parasitic wasps.
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Preventing whiteflies on Cosmos
Yellow sticky traps as monitoring. Reflective mulch. Encourage natural enemies.