Onion yellow dwarf: Crinkled and flattened leaves
Pathogen: Poty virus
Symptoms
Leaves are sometimes crinkled and flattened and tend to fall over. Leaves show symptoms ranging from yellow streaks to complete yellowing of leaves.
Disease development
The virus is carried by infected seed bulbs, onion sets and volunteer onions. Many aphid species can transmit this virus from infected to healthy plants.
Disease management
Diseased plants should be removed and burnt. Spary malathion (0.1%) or metasytox (0.1%). Healthy bulbs should be used for seed production.
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