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
|Published (Last):||2 November 2015|
|PDF File Size:||16.36 Mb|
|ePub File Size:||15.58 Mb|
|Price:||Free* [*Free Regsitration Required]|
These fungi are generally present in all citrus groves in Florida and increase in numbers when the proper environmental conditions prevail. For first-generation egg sampling, a precision level of 0.
Aleyrodidae Orientation to pest Citrus whitefly, Dialeurodes citri Ashmeadis a polyphagous invasive whitefly of Asian origin that was once a major pest of citrus in the United States, as well as infesting a range of other plants.
Nymphs Nymphal stages are sub-elliptical in shape and almost flattened; they can be easily mistaken for young scale insects, but they have a well-marked vasiform orifice.
Biological Control of Citrus Whitefly < dialeurodes citri
Entomologia Experimentalis et Applicata Like all whiteflies, this species has sessile nymphs that are affixed to plant surfaces, where they feed by removing plant sap, debilitating the host. Central America and Caribbean: Citrj control attempts were begun in when the U. Insect Pests of Farm, Garden, and Orchard.
Further injury is caused by sooty mold fungus which grows over fruit and foliage in the copious amount of honeydew excreted by the whitefly.
The nymphs of the citrus whitefly lack a fringe of conspicuous, white, waxy dialdurodes or rods extending out from the margin of the body, which characterizes some species of vitri. Infested plants are frequently covered in copious quantities of sticky and transparent honeydew, covering the leaf areas where the whitefly occurs and dropping onto the upper surface of underlying leaves.
Dialeurodes citri Ashmead Insecta: Larvae that had almost completed their development and young pupae of both sexes of D. Dialeurodes citri is polyphagous; among citrus species and varieties it prefers orange and easy dialleurodes cultivars. Sternorrhyncha dialehrodes the Canary Islands with special reference to Aleyrodes, Siphoninus, and the challenges of puparial morphology in Bemisia. Morrill and Back recorded two other ladybird beetles, Cycloneda sanguinea L. Whiteflies also are controlled by sprays applied primarily for control of scale insects.
Visit the EDIS website at http: Title Pupal case Caption Dialeurodes citri citrus whitefly ; pupal case.
EPPO Global Database
However, it was slow to disperse. Risk of Introduction Top of page D.
Pest Status and Management. Nymphs and pupae of the citrus and cloudywinged whiteflies are almost indistinguishable. Observations on the biology and behaviour of Citrk arcuatus Rossi Col. Leaf infested with citrus whitefly white dots dispersed over leaf Figure 5.
Also, fruit covered with sooty mold will be retarded in ripening and late in coloring, especially the upper part, which may remain green after the lower portion has assumed the color of ripe fruit.
Experiments on the biological control of Dialeurodes citri Ashm. Agricultural and Forest Entomology 1: The entire life cycle from egg to adult requires from 41 to days, but a great variation has been noted even among eggs laid on the same leaf on the same day. Environmental Entomology, 15 3: They dialeuroes both reported not to adversely affect E. Aleyrodidae of Europe recorded in Croatia [Conference poster].
Several parasites and predators attack the citrus whitefly. The sootymold can be washed away with soaps before marketing. Early in the spring pupae appear, and in March and April adults emerge.
More information about modern web browsers can be found at http: Distribution Maps of Pests, series A, The whitefly adult is white with a darkened area at the end of each wing. The adults of both sexes have two pairs of wings covered with a white, powdery wax which gives the insects their common name.