Difference between revisions of "Eriosoma lanigerum"
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[[File:Eriosoma_lanigerum_PaDIL136103a.jpg|250px|thumb|''Eriosoma lanigerum'' apterous vivipara (click on image to enlarge it)<br/>Author(s): Alice Ames, Department of Primary Industries, Victoria<br/>Source: [http://www.padil.gov.au/pests-and-diseases/Pest/Main/136103 PaDIL]]] | [[File:Eriosoma_lanigerum_PaDIL136103a.jpg|250px|thumb|''Eriosoma lanigerum'' apterous vivipara (click on image to enlarge it)<br/>Author(s): Alice Ames, Department of Primary Industries, Victoria<br/>Source: [http://www.padil.gov.au/pests-and-diseases/Pest/Main/136103 PaDIL]]] | ||
| − | <font color="#800000">'''''Eriosoma lanigerum'''''</font> (Hausmann, 1802) - (woolly apple aphid) | + | <font color="#800000">'''''Eriosoma lanigerum'''''</font> (Hausmann, 1802) - (woolly apple aphid) |
| − | is a serious pest of apple, apparently native to eastern North America, where it uses elm trees as primary host. It has been introduced into various apple-growing regions around the world. The aphid feeds on the young branches of apple, causing blisters, cankers, weakening of the trees and often secondary fungus infections. | + | |
| + | The aphid is a serious pest of apple, apparently native to eastern North America, where it uses elm trees as its primary host. It has been introduced into various apple-growing regions around the world. The aphid feeds on the young branches of apple, causing blisters, cankers, weakening of the trees and often secondary fungus infections. It also colonizes roots and injured parts of the bark where the aphid overwinters as nymphs. | ||
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| + | There may be up to 10 parthogenetic generations per year with the females giving birth to live nymphs. Winged males and females also develop, disperse and produce eggs. The apterous female is about 2 mm long, brownish and hidden under woolly wax filaments. It contains a red liquid which becomes visible when squashed. The main natural enemy is the parasitoid [[Aphelinus mali (parasitoid)|''Aphelinus mali'']] which has been introduced into many regions and is one of the earliest examples of biological control. Other control methods involve the use of mineral oils or resistant rootstocks. | ||
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In eastern North America, the primary and overwintering host is elm, where it feeds on leaves and buds, causing leaf curling. After two wingless generations on elm in the spring, a winged generation follows, which migrates to a summer host like apple and then back to elm in autumn. Apparently, the summer hosts were originally ''Crataegus'' and ''Sorbus'' and it adapted to apple when this crop was introduced into North America. Even in eastern North America apple may now be colonized all year round. | In eastern North America, the primary and overwintering host is elm, where it feeds on leaves and buds, causing leaf curling. After two wingless generations on elm in the spring, a winged generation follows, which migrates to a summer host like apple and then back to elm in autumn. Apparently, the summer hosts were originally ''Crataegus'' and ''Sorbus'' and it adapted to apple when this crop was introduced into North America. Even in eastern North America apple may now be colonized all year round. | ||
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<gallery widths=200px caption="Other images of Eriosoma lanigerum (IPM Images and PaDIL - click to enlarge)"> | <gallery widths=200px caption="Other images of Eriosoma lanigerum (IPM Images and PaDIL - click to enlarge)"> | ||
Latest revision as of 20:07, 17 August 2022
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Author(s): Alice Ames, Department of Primary Industries, Victoria
Source: PaDIL
Eriosoma lanigerum (Hausmann, 1802) - (woolly apple aphid)
The aphid is a serious pest of apple, apparently native to eastern North America, where it uses elm trees as its primary host. It has been introduced into various apple-growing regions around the world. The aphid feeds on the young branches of apple, causing blisters, cankers, weakening of the trees and often secondary fungus infections. It also colonizes roots and injured parts of the bark where the aphid overwinters as nymphs.
There may be up to 10 parthogenetic generations per year with the females giving birth to live nymphs. Winged males and females also develop, disperse and produce eggs. The apterous female is about 2 mm long, brownish and hidden under woolly wax filaments. It contains a red liquid which becomes visible when squashed. The main natural enemy is the parasitoid Aphelinus mali which has been introduced into many regions and is one of the earliest examples of biological control. Other control methods involve the use of mineral oils or resistant rootstocks.
| Vernacular names | |
|---|---|
| • Deutsch: | Blutlaus |
| • English: | woolly apple aphid |
| • Español: | pulgon lanigero del manzano |
| • Français: | puceron lanigère du pommier |
| • Português: | pulgão-lanígero-da-macieira |
In eastern North America, the primary and overwintering host is elm, where it feeds on leaves and buds, causing leaf curling. After two wingless generations on elm in the spring, a winged generation follows, which migrates to a summer host like apple and then back to elm in autumn. Apparently, the summer hosts were originally Crataegus and Sorbus and it adapted to apple when this crop was introduced into North America. Even in eastern North America apple may now be colonized all year round.
- Other images of Eriosoma lanigerum (IPM Images and PaDIL - click to enlarge)
colony on elm leaf
colony
colony on apple
apterous vivipara, antennae
apterous vivipara, head
apterous vivipara, tip of abdomen
