back to HYPP Zoology home page


.
Myzus ascalonicus Doncaster
Rhopalomyzus ascalonicus

Insecta, Homoptera, Aphididae .

Shallot aphid

Description, Biology, Life Cycle, Damage, Common Names, Images


[R]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 (*) .

[R]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.

[R]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).

[R]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).


[R]Common Names
DE: Schalottenlaus, Zwiebellaus ES: Pulgon del chalote FR: Puceron de l'échalote IT: Afide dello calogno PT: Piolho da echalota GB: Shallot aphid

[R] Images

  1. Myzus ascalonicus Doncaster (Coutin R. / OPIE)
    Damage to onion
  2. Myzus ascalonicus Doncaster (Coutin R. / OPIE)
    Colony on leaf of onion Adults and nymphs.
    .

To read this page in French

HYPPZ on line : Species (scientific name), Pests (common names), Glossary, Crops.

back to HYPP Zoology home page