I. purchasi belongs to the scale insect family Monophlebidae, the giant scales. The genus Icerya has been poorly studied and it is possible that. Icerya purchasi (Hemiptera: Margarodidae) . How to manage pests citrus cottony cushion scale, scientific name: Icerya purchasi. Univ. Calif. IPM Pest. Icerya purchasi Maskell trials with Cryptochetum iceryae and Rodolia iceryae for improved biological control of Icerya purchasi in Israel.

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Horticultural Journal, 11 2: Adults can be purdhasi on the branches or trunks of trees. Good control was achieved when applied alone or with 0.

The first attempt at biological control of Cottony cushion scale in New Zealand was the shipment of the fly, Cottony cushion scale parasitoid, Cryptochaetum iceryaefrom Australia in The nymphs and adult females produce long, hair-like, transparent rods of wax from the body.

Fact Sheet: Cottony cushion scale | Citrus Pests

Effects of Oikos a. Icerya purchasi Maskell, cottony cushion scale Hemiptera: Cottony cushion scale females have both male and female sexual organs hermaphrodites and can produce female offspring asexually through parthenogenesis. Group of adult female cottony cushion scales, Icerya purchasi.

Vogt H, Vinuela E, eds. Prunings of infested plants, and the clothing, tools and vehicles of agricultural workers, can become contaminated with the crawlers and so aid in their dispersal.

File:Icerya purchasi 1.JPG

Icerya purchasi Maskell, cottony cushion scale Homoptera: When mature, they make a white, fluted, egg sac. Four are wasp and one is a fly. Cottony cushion scales can have 2 – 3 generations per year. Early nymphal stage of the cottony cushion scale, Icerya purchasi Maskell. Cottony-cushion scale, fluted scale.

Host Plants Cottony cushion scale is found on cultivated, naturalised and native plants. Monophlebidae on a leaf of Lemonwood, Pittosporum eugenioides Pittosporaceae: Please consider a year-end gift to BugGuide!


After its introduction into California, USA, in the late nineteenth century, it was recorded devastating citrus orchards, killing even large trees. At each molt, they leave at the old feeding point the former skin and the waxy secretions in which they had covered themselves and from which their common name is derived. After three molts the adult begins to deposit eggs and secrete the conspicuous egg sac. Contributors own the copyright to and are solely responsible for contributed content.

Encyrtidae parasitoid 10 adventive Cryptochaetum iceryae Williston, Cottony cushion scale parasitoid Fly Diptera: Biological control of pests in Israel a review The microscopic features of I. It may contain bright red, oblong eggs. An Australian scale insect occasionally found in gardens, parks and native habitats in both North and South islands.

The occasional unfertilised egg develops into an adult winged male. Monophlebidae on a leaf. The control of the cottony-cushion scale was the first outstanding example of the successful biological control of a pest by an introduced natural enemy.

The cottony cushion scale was described by Maskell from specimens sent to him by Dr. Matings of a male and hermaphrodite will produce both males and hermaphrodites.

New Zealand entomologist, The cryptochaetid endoparasitoid Cryptochaetum iceryae Williston was introduced into Egypt in and into Israel in the late s in order to supplement the effect of the vedalia.

Distribution Maps of Plant Pests, No. Apparently interpreting this as a request for the ladybug, the California party sent a shipment of these ladybugs and included some cottony cushion scales as food for the ladybugs. Caltagirone and Doutt suggested that these plants with residual populations of the scale provide permanent sources of vedalia that will disperse into new infestations of scale on citrus and bring them under control. Additional Information Biological control of pests Biological control of aphids and other herbivorous pests can reduce the impact of the pests and the need to use insecticides.


The stylets form two tubes, one down which saliva is pumped into plant cells and the second tube through which it sucks the contents of the plant cells. This fact sheet is a part of the app Pacific Pests and Pathogens. Retrieved from ” https: Bulletin of Entomological Research, 85 4: Margarodidae in London gardens. The body of the female and all other stages is dark-red, 0.

Fact sheet – Cottony cushion scale ()

Two of the wasps are hypoparasites, that is they parasitise other parasites. The cardinal ladybird is an important predator of the Cottony cushion scale, Icerya purchase Maskell, Hemiptera: It excretes the excess water and sugar, which is called honeydew.

One of which is the famous Vedalia beetle or Cardinal ladybird, Rodolia cardinalis. In the Spanish citrus industry, it is important iferya only use pesticides when absolutely necessary to ensure that the biological control agents of the citrus pests are not significantly injured; side-effect testing of pesticides on the control agents has purxhasi routinely carried out in Spain for many years Jacas Miret and Garcia Mari, The cottony cushion scale can be distinguished easily from other scale insects in Florida.

The scale insect also infests native and other trees. The ovisac may reach the same length as the body, giving an overall combined length of up to 20 mm.