ERIOSOMA LANIGERUM PDF

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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Movement of woolly apple aphid Eriosoma lanigerum Homoptera: Full text Asante, S. Very little internal or external deformation of roots was observed after treatment with indoleacetic acid. Banding of trunks with granules of these insecticides has also been useful in decreasing infestations, by checking the movement of first-instar nymphs that migrate between aerial and subterranean habitats on apple Thakur and Dogra, Susceptibility of nine apple cultivars to woolly apple aphid, Eriosoma lanigerum Homoptera: Air-blast sprayer applications of mineral oil, or oil plus buprofezin are applied in erisooma orchards under IPM programmes in New Zealand.

The aphids are attracted to the sunken sites caused by the perennial canker fungus Cryptosporiopsis perennans and the galls are then the most frequent places on the tree for the fungus to re-infect it. Preliminary models to predict canopy infestations were developed.

Apple Best Practice Guide

Pictures Top of page Picture Title Caption Copyright Title Colour illustration Caption Wooly aphid life stages right and infestation on apple, causing galls on stem left. Phytosanitary study of apple cultivation Malus sylvestris Mill in the municipalities of Arteaga and Saltillo, Coahuila.

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Photo by Peggy Grebb. Woolly apple aphid Eriosoma lanigerum Hausm. Mature trees are often little affected, even though levels of infestation are generally greatest in orchards over 25 years old Molinari, The pre-reproductive and reproductive stages were longer in winter than in summer, while fecundity was greater in summer than in winter. It infests both the canopy and root system of apple trees, although root damage is usually more severe than stem damage.

It is a true bug and sucks sap from plants. Deciduous Fruit Grower, 42 Apterae body length 1.

Eriosoma lanigerum (woolly aphid)

Several factors seem to affect the presence of earwigs in the orchards, the most important one being the drainage of the soil. African Entomology 16 1 Commonwealth Institute of Entomology. This led once more to heavy aphid infestations and outbreaks of apple canker.

Peak captures were observed from Eriosoms to June, and in some years and orchards there seemed to be two annual peaks fig 1probably due to fluctuation of the maximum temperatures in summer. Aphelinidae to control arboreal populations is contradictory.

AphID – Eriosoma lanigerum

The number of A. Alternatives to organophosphate pesticides have been tested for several years. Accepted Sep 2.

In contrast, sulfur was found to be moderately toxic to the parasitoid under laboratory conditions, as well as in a field survey. Deciduous Fruit Grower 5122—23, They were used at three concentrations. Download PDF of this page Print this page. On aerial plant parts, the preference for sheltered sites, including wounds and axil buds, is possibly an adaptation to avoid natural enemies Brown and Schmitt, The latter could thus comprise a suitable and putative refuge for parasitoids, which could be used to increase the effectiveness of biological control.

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Second international symposium on integrated fruit production, Veldhoven, Netherlands, August This observation could be attributed to the difficulty encountered by predators to reach them. A neem-based insecticide provided temporary suppression, as did several neonicotinyl insecticides.

They have a relatively small cornical pore size 0. Erilsoma eggs hatch out into wingless “stem mothers” who begin to give birth to nymphs by parthenogenesis. Eriosoma lanigerkm is an exotic species in the Middle East. Results showed that the three tested lanigdrum were active as aphicides against the target species and that mortality to nymphs was higher than that obtained against apterous adults.

Risk of Introduction Top of page E. Journal of Entomological Science, 27 3: Pirimicarb gives reasonable aphid control without adversely affecting A. Journal of Applied Entomology26— Sachan and Gangwar, Spiders and velvet mites were ruled out as main variables of the PCA as they had a null contribution to the overall explained variance.

A total of individuals from four different regions were collected and analysed.

However, Aphelinus mali together with other flying natural enemies, e. The alate aphids are the offspring eriosmoa apterous virginoparae and they occur first in November and then from late January to late April. The field biology of subterranean populations of the woolly apple aphid, Eriosoma lanigerum Hausmann Hemiptera: