Aleurolobus olivinus Silvestri
Insecta, Homoptera, Aleyrodidae .
- Adult: appearance of a typical whitefly. Similar to a minute fragile moth, entirely white; about 1.7 mm long. Transparent wings with numerous veins, covered with a white powder. Body: cream-coloured, and also powdered with white wax.
- Egg: elliptical but assymetrical, slightly reticulate and possessing a pedicel at one end which attaches it to the plant. About 0.2 mm long, greyish-yellow in colour.
- Nymph: body almost circular, entirely fringed with fine setae, flattened against the surface of the leaf like a scale insect, black in colour. The centre of the nymph becomes lighter in colour as it develops.
The pupa is black and resembles a flat pellet stuck to the leaf.
- Host plants: olive, filaria (Phillyrea).
- Adults: the female lays 50 to 60 eggs on the upper surface of foliage, usually one per leaf, but sometimes in clusters of 5 to 9.
- Eggs: embryonic development of the egg takes about fifteen days.
- Nymph: the young nymph moves until it finds a suitable site, where it settles until moulting into an adult, having undergone 3 other moults. Development takes a year and the adult appears at the beginning of the following spring.
- This species has only one generation per year.
- Adults are active in June and July.
Larvae cause the damage to plants. Their honeydew may be colonized by sooty moulds.
Natural enemies usually suffice to keep populations of this whitefly at a very low level.
DE: Schwarze Ölbaummottenlaus ES: Aleiródido del olivo FR: Aleurode noir de l'olivier IT: Aleirode nero dell'olivo PT: Aleurode da oliveira GB: Olive whitefly
- Aleurolobus olivinus Silvestri (Da Silvestri)
Egg and larvae On the left: first instar larva (ventral view); on the right: fourth instar larva (ventral view).
Aleurolobus olivinus Silvestri (Da Silvestri)
Colony on an olive leaf: 4th instar larvae
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