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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Eriosoma lanigerum

Peak numbers of first instar aphids were recorded during spring. Journal of Economic Entomology 84— Of Nearctic origin, the pest has lanogerum wide geographical distribution and occurs throughout the Middle East. For WAA, only linear models based on temperature Asante et al.

Xinjiang Agricultural Sciences, 45 2: Although it is difficult to extrapolate the results of three orchards to the whole area, some common aspects can be highlighted. Pirimicarb appeared to offer some suppression of woolly aphid during the first season but not in subsequent seasons, while chlorpyrifos and vamidothion failed to control woolly aphid in any season.

However, specialized herbivores that feed on different host plants have been shown to form host-specialized races. Phenological measurements indicated that the aphids showed poor settlement, development, and survival on Er2. Ten trees with permanent trunk tapes used to evaluate crawler movement section above were included, together with another 10 WAA-infested trees that had never been trunk-taped.

Aphididae in West Virginia apple orchards. The most important pests of apple and pear trees. Deciduous Fruit Grower 5122—23, Agriculture and Forestry 5685— The honeydew can also create unpleasant conditions for orchard workers to work in due to high levels of sticky honeydew excreted. Woolly aphid of apple, Eriosoma lanigerum Hsm. Apterous virginoparae attain a rapid rate of nymphal development, large adult size, high fecundity and high population growth rate in eriosoam spring compared to summer, autumn and winter.


For example, the captures on the trunk tapes, which show the pattern of upward and downward crawler movement, occurred consistently from mid-April to November with a plateau around May—June, while the laingerum across the canopy was higher from May to August fig 1.

An Identification and Information Guide. Results showed that the three tested flavonoids were active eriksoma aphicides against the target species and that mortality to nymphs was higher than that obtained against apterous adults.

More embryos were recorded in fourth instar and adult aphids than in the other developmental stages. Of the other insecticides, imidacloprid was more toxic to the adult parasitoid than pirimicarb and triazamate.

Journal of the American Society for Horticultural Lanigerim, 1: The principal natural enemy that achieved this was the parasitoid Aphelinus maliassisted by predators whose contribution remained obscure, including the brown lacewing Micromus tasmaniae and the European earwig Forficula auricularia. Feeding resulted in greater shoot and root dry weights and a disruption in nutrient balance, with reduced foliar nitrogen and phosphorous compared to control trees Weber and Brown, A neem-based insecticide provided temporary suppression, as did several neonicotinyl insecticides.

Woolly erioslma aphid Eriosoma lanigerum Hausm. Revue Suisse de Viticulture, d’Arboriculture et d’Horticulture, 21 6: Apple is the major host and pear is a minor host. The fourth instar alatiform nymph of Eriosoma lanigerum shown in thepicture below is reddish brown with very small wax glands erioskma consequently much less wax.

Eriosoma lanigerum

Journal of Agricultural Science 4 2 American blight; aphid, elm rosette; aphid, woolly apple; apple root aphid; blight, American; elm rosette aphid; woolly apple aphid Spanish: The tapes were removed 1 week later and aphids were individually counted under a stereomicroscope.

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Verticillium lecanii reiosoma the only fungal pathogen reported to infect Eriosoma lanigerum. Tropical Pest Management, 34 2: Adhesive bands placed immediately above and below single colonies to determine the direction of movement showed that 60 per cent. Linking current practices of area-wide pest management information on pest population genetics and geographical barriers would increase the efficiency of these programs.

Bulletin of Entomological Research 1 Retrieved from ” http: Based on work by Ronda Koski and Melissa.

Apple Best Practice Guide

To evaluate AI eriosma the end of the winter survival trial, data were tested for significance by a non-parametric Kruskal—Wallis test, and the Steel—Dwass method was used to separate treatments. Some authorities classify such aphids as Eriosoma lanigerum. A multilateral approach that includes both biotic and climatic data was developed to detect the main variables that affect the ecology and population dynamics of woolly apple aphid Eriosoma lanigerum Hausmann. The role of conifer ladybird Exochomus quadripustulatus L.

Thiacloprid Laniferum is not listed here because although it is effective against other aphid species on apple and many other pests, it is ineffective against woolly aphid. Spraying the orchard with a pyrethroid three times during had little effect on the population behavior, demonstrating the resilience of laingerum woolly apple aphid and its natural enemy guild.