Spring onion diseases and pests: symptoms and control
The 3 entries in Laisha's encyclopedia that attack Spring onion, grouped by type. Each page covers identification, life cycle, the conditions that favour it, action thresholds and integrated management.
Growing Spring onion? The free Spring onion grow guide covers the crop from sowing to harvest.
Insect pests
Onion thripsThrips tabaciInsect · A tiny thrips that rasps the surface of onion, garlic and leek leaves, leaving silvery streaks that reduce…
Fungal diseases
Purple blotch of onionAlternaria porriFungal disease · Purple blotch is a leaf disease of onion, garlic, leek and shallot that produces sunken, purple-brown…
Stemphylium leaf blight of onion and garlicStemphylium vesicariumFungal disease · Stemphylium leaf blight causes tan to brown lesions, often at the tips of onion and garlic leaves, that turn…
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