Life Cycle: Eriosoma lanigerum is an exotic species in the Middle East. In North America its primary host is the American elm tree (Ulmus. back to HYPP Zoology home page. Eriosoma lanigerum (Hausmann) Schizoneura lanigerum. Insecta, Homoptera, Pemphigidae. woolly apple aphid. Compiled by Whitney Cranshaw, Colorado State University. Eriosoma lanigerum (Hausmann) Homoptera: Eriosomatidae.

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The strong correlation observed between EarwP and EarwC suggests that glue tapes are a practical and efficient means by which to estimate the presence of earwigs in the orchard, without the need for special shelters.

Susceptibility of nine apple cultivars to woolly apple aphid, Langierum lanigerum Homoptera: At low infestations, the aphid is confined to the trunk and large branches but disperses to establish colonies on twigs or new lateral growths during peak populations. Observation on the fauna of arthropods from apple orchards in winter in Kyongbuk province.

Eriosoma lanigerum (Woolly apple aphid): identification, images, ecology, control

Mature trees are often little affected, driosoma though levels lanigermu infestation are generally greatest in orchards over 25 years old Molinari, If one or more trees in the sample has woolly aphid, in the extension erlosoma, treatment with an insecticide is justified.

The siphunculi are reduced to a pair of rings on the posterior dorsum of the abdomen. Woolly aphid infestations were found to be extremely low in programs utilising mating disruption and fenoxycarb a carbamate insect growth regulator for codling moth control. Galling of aerial plant parts can reach the size of a walnut and interfere with sap circulation. Eriosoma lanigerum occurs on the both the aerial and subterranean woody tissue of apple. Journal of Economic Entomology 97— Perennial apple canker also virtually disappeared.


Eriosoma lanigerum

Eriosoma lanigerum infestations have increased in the North-western United States as apple growers have reduced the use of organophosphate pesticides, it is thought that the use of these chemicals to control the codling moth in orchards also repressed the infestation by eriosomma aphids.

Criticism of products or equipment not listed is neither implied nor intended. Most of the aphids showed negative phototropism in the laboratory, the percentage to do so increasing as the temperature was raised. The gene Er3, from Aotea an accession classified as Malus sieboldiiis a new major gene for woolly apple aphid resistance.

Eriosoma lanigerum (woolly aphid)

Entomologia Experimentalis et Applicata 47— Lnaigerum arrangement of these filaments kanigerum the cuticle above each epidermal cell gives rise to the distinctive wax skein found in each wax-producing species hollow, solid or honeycombed. One or more of the features that are needed to show you the maps functionality are not available in the web browser that you are using. Pirimicarb gives reasonable aphid control without adversely affecting A.

When several references are cited, they may give conflicting information on the status. African Entomology 15 2: Wingless females of woolly apple aphids live in dense colonies see picture top on the roots, trunk or branches of the secondary host apple Malus erjosoma it is a serious pest, often causing deformation and cancer-like swellings of bark.

Apterous summer virginoparae are 1. Indian Journal of Entomology, 49 4: Of Nearctic origin, the pest lanigsrum a wide geographical distribution and occurs throughout the Middle East.


The alate aphids are the offspring of apterous virginoparae and they occur first in November and then from late January to late April. The model obtained had a coefficient of determination of 0. The nymphs go through four instar moults before becoming an imago. A second approach to management, that of controlling the root colonies, was explored for the first time in this region.

Woolly apple aphid Eriosoma lanigerum Hausm. Accepted Sep 2. The development of a sampling system for monitoring population levels of the woolly apple aphid, Eriosoma lanigerum Hausmannin apple orchards in the Western Cape Province of South Africa.

Woolly Apple Aphid

A single annual application of lufenuron a eriksoma pesticide which inhibits chitin production within the integrated fruit production programme was not detrimental to any of these natural enemies, although further research is needed to confirm its lack of impact on the lacewing.

Photo by Peggy Grebb.

It was assumed that earwig numbers in orchards had decreased in recent years. Every 2 weeks, the total length of the shoot and the length occupied by WAA were measured lsnigerum calculate the percentage of the AI. Every week throughout the year, we counted the number of earwigs per shelter.

The authors discussed the potential for imidacloprid in integrated pest management programs. Informatore Fitopatologico, 36 New Zealand Journal of Ecology 23 1 ,