| Description: |
| Apterous adult: 1 - 2 mm long; brownish - green; antennal tubercles well-developed and slightly convergent; antennae as long as body; distal part of siphunculi slightly swollen. |
| Biology: |
Unknown before 1940, this cosmopolitan and now very common species is polyphagous and occurs on various Liliaceae (onion, leek, shallot), Compositae, Cruciferae, Gramineae, Rosaceae (strawberry), potato, beet and numerous ornamentals.
- Winged migrants appear in the spring and infest various herbaceous plants, causing severe distortion of the foliage and flower trusses. A return migration to strawberry occurs in October, winged forms giving birth to apterous virginoparae; aphids continue to reproduce parthenogenetically during the winter. |
| Life cycle: |
| - An anholocyclic species reproducing parthenogenetically throughout the year. During mild winters, colonies can survive outdoors. Otherwise, aphids remain on glasshouse plants, or on crops in store (bulbs). |
| Damage: |
| - Aphid colonies occur on shallot and various bulbs at the end of the storage period, thus causing the malformation of new seedlings. In addition, Myzus ascalonicus is a vector of beet mild yellowing virus (BMYV) and the beet yellows virus (BYV). |
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Photos: 2 |
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