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Rhopalosiphum insertum (Walker)
Insecta, Homoptera, Aphididae .

Apple-grass aphid

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

- Adult: green with back paler and appendices concolorous with the body.

- A species having apple as primary host and Gramineae as secondary hosts.
- Winter eggs are laid on apple, being scattered over old wood and not clustered together as in Aphis pomi .
- Fundatrices give rise to apterous virginoparae (fundatrigeniae) in spring.
Soon after flowering, 2nd-generation alatae leave the trees and move on to the roots of numerous species of Gramineae. In autumn, winged males and sexuparae, which will later produce apterous sexual females, undertake a return migration to apple and preferably spread to the underside of old leaves (they never move to young shoots).

[R]Life Cycle
- On average, there are 8 to 9 generations annualy. Dense colonies are present on apple in the spring and the autumn but never in the summer.

- This species most commonly attacks old apple trees (*) ; it is generally not very harmful.

[R]Common Names
DE: Apfelgraslaus ES: Pulgón migrador del manzano FR: Puceron vert migrant du pommier IT: Afide verde migrante PT: Piolho migratório da macieira GB: Oat-apple aphid, Apple-grass aphid

[R] Images

  1. Rhopalosiphum insertum (Walker) (ACTA)
    Attack on older shoot of apple

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