Host plants: Dialeurodes citri is polyphagous; among citrus species and varieties it prefers orange and easy peeler cultivars. Morphology: The. Dialeurodes citri (Riley et Howard) (Coutin R. / OPIE) Damage on lemon Leaves are curved and the underside is coated with honeydew and sooty moulds. Dialeurodes citri first appeared in California in , but never became a serious pest (Kennett et al. ). Citrus whitefly was found in France around
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However, it was slow to disperse. When several references are cited, they may give conflicting information on the status. The bodies of the first three nymphs are transparent, whitish; the fourth-instar nymph, during which the insect pupateshas ccitri Y-like mark on its body.
Biological control of the diaaleurodes whitefly, Dialeurodes citri Ashmead Homoptera: Lacewing larva Chrysoperla sp. Eggs and nymphs of the citrus whitefly, Dialeurodes citri Ashmead.
Please consult the specific management guide for your situation. Also, more than one application of sulfur per year can have an adverse effect on parasites. A long winter diapause spent in the nymphal stageand a consequently lower number of generations may be observed in nearly all non-native areas, such as the Mediterranean Region.
EPPO Global Database
Revised AugustJanuaryand April Aphelinidae and its effectiveness as a control agent in Florida. Cloudywinged whitefly adults have a darkened area in the middle of each wing, which is lacking in the wings of the citrus whitefly, and the wings fold to a flatter position than those of the citrus whitefly.
Encarsia lahorensis is regarded as the most efficient parasitoid of D.
Sooty mold growing on honeydew produced by citrus whitefly Figure 6. Moreover, in these situations D. Spatial dispersion and sampling of citrus whitefly, Dialeurodes citrifor control decision in a citrus orchard. Zhejiang Agricultural Dialeurores, 6: Like all whiteflies, this species has sessile nymphs that are affixed to plant surfaces, where they feed by removing plant sap, debilitating the host.
Description Top of page Priore gives a morphological description of all stages of this insect.
These fungi are commonly referred to as “friendly fungi,” and the two major species are often referred to as red Aschersonia and yellow Aschersonia. Note biologiche ed orientamenti di lotta contro Dialeurodes citri Ashm. Adults of citrus whitefly, Dialeurodes citri Figure diaelurodes. Box 80, Bet Dagan, Israel. It is now found throughout Florida and parts of other Gulf States and California and in greenhouses in many parts of the United States.
In large commercial plantings of citrus, citrus whitefly and cloudywinged whitefly are largely controlled in rainy weather by whitefly fungi. Il Dialeurodes citri Ashmead Homoptera: Transactions and Proceedings of the New Zealand Institute 28 n.
Forest Pest Insects in North America: a Photographic Guide
Clitostethus arcuatus Rossi Coleoptera: Introductions may be achieved using either the ‘bouquets’ or the ‘small plants’ methods: Some important species are the red fungus Aschersonia aleyrodis Webber and the brown fungus Aegerita webberi Fawcett.
The whitefly adult is white or white with dark spots on the wings. Report of a trip to India and the Orient in search of the natural enemies of the citrus citti fly.
Complete biological control was obtained.
Bowman and Bartlett, This black fungus may cover the leaves and fruit so completely that it interferes with the proper dialeurdoes activities of the trees. The young nymphs move around for several hours, then they settle on the leaf underside. Some important dialeurrodes are the red fungus Aschersonia aleyrodis Webber and the brown fungus Aegerita webberi Fawcett. Distribution Top of page D.
Two species of whiteflies on citrus in Eastern Mediterranean: The whitefly adult is all white without any dark spots on wings. Introduced insect enemies and microorganisms.