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Myzus persicae (Sulzer)
Myzodes persicae

Insecta, Homoptera, Aphididae .

Green peach aphid

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

- Winged form: green abdomen with a black patch, black thorax, 2 pairs of long, translucent wings.
- Wingless form: smaller, pale green body with the siphunculi and cauda relatively shorter than those of the winged form. Converging antennal tubercles (*) .

Holocyclic, dioecious, aphid with peach or plum) (*) as primary hosts. Secondary hosts are mainly annual herbaceous plants; in southern areas, parthogenetic females overwintering on their secondary hosts.
- The biology of M. persicae varies with climatic conditions, especially temperature. Fertility drops rapidly at temperatures over 30°C, and in glasshouses, individuals disperse.
- Longevity of adults: 3 months at 5°C, 10 days at 25°C.
- Longevity of nymphs: 21 days at 10°C, 7 days at 25°C.
- Average fertility: 80 nymphs per female (wingless forms lay more eggs than winged forms).

[R]Life Cycle
(in temperate areas) (*) :.
- Winter eggs hatch in April, giving rise to the fundatrix, a viviparous parthenogenetic wingless female.
- The fundatrix produces ca. 40 nymphs which become either winged or wingless adults.
- After 3 generations, only winged forms are produced, which fly to secondary host plants (because of the plant's physiological state and of intraspecific competition): primary host plants are without aphids from 15th May or 10th June according to climatic conditions.
- Several generations of viviparous parthenogenetic females (both winged and wingless) are produced successively on the secondary host plants.
- Sexuparous winged forms appearing from early September to late November fly back onto the primary host. They give birth to sexual females.
- At the same time, males are produced on the secondary host plants.
- Mating takes place in late October.
- Winter eggs are deposited at the bases of buds. They hatch in April.

Because M. persicae is a sap-feeding insect, it causes both direct (leaf curling) (*) and indirect damage (mainly as vector of viruses such as cucumber virus I, lettuce mosaic virus (LMV)). In glasshouses, it can transmit both viruses to various plant species (melon, marrow, tomato, egg plant, red pepper) and to wild plants which will act as reservoirs.
When aphids invade from outside, several foci of attack may result in an averall infestation.
This very polyphagous aphid can attack almost all protected crops. In the fields, it can damage rape, potato, cabbage, spinach, lettuce, chicory and also peach.

[R]Common Names
DE: Grüne Pfirsichblattlaus ES: Pulgón verde del melocotonero FR: Puceron vert du pęcher IT: Afide verde del pesco PT: Piolho verde de pessegueiro GB: Peach-potato aphid, Greenhouse aphid, Green tobaco aphid

[R] Images

  1. Myzus persicae (Sulzer) (INRA)
    Life ycle diagram Heteroecious life-cycle of Myzus persicae: the aphis alternate between peach (the primary host) (1), and herbaceous (secondary) host (2). In hot conditions, it continues to breed on secondary hosts (*).
    1 : winter egg.
    2 : fundatrix (virginiparous, viviparous, apterous).
    3 : fundatrigeniae (ditto).
    4 : winged virginoparae, ensuring dissemination.
    5 : migration to a secondary host by winged virginoparae.
    6 : virginoparae, winged and apterous.
    7 : sexuparae (winged).
    8 : sexual forms (winged male, oviparous apterous female).
    (From ACTA and C.A Dedryver, 1982).
  2. Myzus persicae (Sulzer) (Coutin R. / OPIE)
    Colony The inferior face of a beet leaf.
  3. Myzus persicae (Sulzer) (Coutin R. / OPIE)
    Colony on tomato Aphids situated on the underside of leaves excrete honeydew, to which exuviae stick. This provides evidence for the presence of this pest.
  4. Myzus persicae (Sulzer) (Coutin R. / OPIE)
    Individuals on peach Adult apterous female and young on the underside of leaf.
  5. Myzus persicae (Sulzer) (Coutin R. / OPIE)
    Damage on peach Characteristic distortion of leaf and colony on the underside of leaf in the spring.
  6. Myzus persicae (Sulzer) (Coutin R. / OPIE)
    Damage to sunflower Leaves are crinkled and blistered.

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