glasshouse whitefly and its parasite
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glasshouse whitefly and its parasite the effect of temperature, light intnsity and type of host planton the longevity and fecundity of trialeurodes vaporariorum and on the efficiency, longevity and fecundity of its chalcid parasite encarsia formosa. by Gamal El-Din Amin Ibrahim

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Published by The author in Bradford .
Written in English

Book details:

Edition Notes

Ph.D.thesis. Typescript.

The Physical Object
Number of Pages147
ID Numbers
Open LibraryOL21504716M

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  1.— Encarsia formosa, Gahan, is a Chalcid wasp that parasitises the white-fly, Trialeurodes vaporariorum, Westw., a single female ovipositing in 50 or more young pupae of the larvae of the parasite, on hatching from the egg, destroys the white-fly pupa, the skin of which becomes black in colour, thus distinguishing the parasitised pupa from the normal white scales and Cited by: A method of mass‐producing the glasshouse whitefly, Trialemodes vaporariorum, and its parasite Encarsia formosa on Nicotiana tabacun is described. Whiteflies of known age are produced for introducing into glasshouses before the introduction of the parasite. They are also produced for stock multiplication of the parasite. Prevent greenhouse whitefly from establishing on seedlings, cuttings, etc. Biological control. A variety of natural enemies (predators, parasites and diseases) has been researched for the management of greenhouse whitefly. The parasite (parasitoid), Encarsia formosa is the most commonly used biological control agent for this pest. Trialeurodes vaporariorum, commonly known as the glasshouse whitefly or greenhouse whitefly, is an insect that inhabits the world's temperate regions. Like various other whiteflies, it is a primary insect pest of many fruit, vegetable and ornamental is frequently found in glasshouses (greenhouses), polytunnels, and other protected horticultural : Aleyrodidae.

Grower Books, London, 56 pp. Google Scholar. Hussey. () Monitoring the activity of tomato Ieafminer (Liriomyza bryoniae Kalt.) and its parasites in commercial glasshouses in G. A. and Jackson, A. W. () Pesticide resistance in glasshouses. Pesticide resistance in glasshouse whitefly (Trialeurodes vaporariorum (Westw Cited by: Whitefly. There are 2 main species present in New Zealand, Greenhouse Whitefly (Trialeurodes vaporariorum) and Citrus Whitefly (Orchamoplatus citri). Whiteflies are small white sap sucking insects mm in length that resemble miniature moths with a wingspan of around 3mm. Both the nymphs and the adult insects are sapsuckers. Whitefly Damage to Plants Whiteflies suck phloem sap and large populations can cause leaves to yellow, appear dry, or to fall off of plants. Due to the excretion of honeydew plant leaves can become sticky and covered with a black sooty mold.   Glasshouse whitefly is another common problem that can be controlled with a small parasitic wasp, Encarsia formosa. Spot the glasshouse mealybug from its Author: RHS Advisory Service.

The changes in numbers and distribution of greenhouse whitefly and its parasite were followed for 16 weeks in a glasshouse of m 2 contain tomato plants. Two methods were used: weekly counts of pupae on all infested plants and a stratified random sampling program whereby % of the plants were checked each week. Whiteflies are harmful to both outdoor and indoor plants by sucking plant sap. Under certain conditions, they can also transmit disease. The whitefly parasite (Encarsia formosa) lays its eggs — as many as 50 to — in both pupae and later larval stages of the white fly, destroying them before they can become host larva turns black as the parasite develops. Whitefly - Pests & Diseases The two species of whitefly that affect many crops are Bemisia tabaci or tobacco whitefly and Trialeurodes vaporariorum or glasshouse whitefly. The main morphological difference that enables these insects to be distinguished from one another is the position of the wings. The adult Glasshouse Whitefly holds its wings in a tent-like fashion over the body, hiding the body and giving it a triangular outline. This is in contrast to Bemisia tabaci, adults of which hold the wings alongside the body, revealing the yellow body colour and giving them an elliptical profile.. Adults of T. vaporariorum generally settle on young foliage close to the growing point of the.