The vedalia beetle, Rodolia cardinalis (Mulsant), was introduced into California in 1888 for the biological control of the cottony cushion scale (DeBach 1973). Biological controls can be an effective treatment for scales on outdoor citrus trees. It can be discouraging to notice these pests in your plants, but take comfort in Within a few years the cottony cushion scale was completely controlled by these introduced natural enemies. Cottony Cushion originates from Australia and is rumored to have come to the … And they will ruin your citrus, unless you get it under control. Control of I. purchasi in California using imported Australian ladybird beetles was the first important success for the principle of biological control (Caltagirone & Doutt 1989). Adult female cottony cushion scale, Icerya purchasi. Biological Control Cottony cushion scales can have 2 - 3 generations per year. Group of adult female cottony cushion scales, Icerya purchasi. Rodolia Cardinalis ( ladybird species ), Vedalia Beetle, Cryptochaetum Iceryae, and other imported Australian ladybird beetles are the main natural enemies of this scale. This ovisac is made of wax secreted from the lower side of the scale. The mangement of Icerya purchasi is based on biological control, and rarely on the use of insecticides. Comments This was the first successful biological control of an insect pest. Photo 1. Icerya purchasi, the cottony-cushion scale, is originally from Australia but has become a cosmopolitan pest of agriculture. Males are rare and exist in the species to allow the scale to reproduce sexually producing both females and males. The protective covering can be hard and waxy to soft and foam-like. Cottony Cushion Scale had taken over, right under my nose! In Israel, the cottony cushion scale was a serious pest in the northern part of the country until biological control became established, which reduced it to … The best control of the Cottony Cushion Scale is through biological control. You have two methods to learn how to get rid of cottony cushion scale. These little buggers are so tiny and sneaky. The following account of the introduction of this scale insect into Florida is largely taken from Gossard (1901). Older instars move to the twigs, branches, or trunk to feed. In areas with hot summers, pruning to open up canopies can reduce populations of black scale, citricola scale, cottony cushion scale, and possibly other scales by increasing scale mortality from exposure to heat and parasites. ... Vedalia beetles and parasitic flies live in coastal areas and prey on cottony cushion scale. So a search began for the control agent, and in 1888, a scientist named Albert Koebele discovered an Australian lady bug eating cottony cushion scale in a garden in Adelaide. It can be discouraging to notice these pests in your plants, but take comfort in. Each female lays a large number of eggs in a dense, fluted ovisac from which this insect gets its name. In Florida, this scale has been reported from most counties. So what was it? Damage from the alfalfa weevil, a serious introduced pest of forage, was substantially reduced by the introduction of several natural enemies. Consider replacing problem-prone plants. You have two methods to learn how to get rid of cottony cushion scale. Cottony cushion scale are sap sucking insects that have protective coverings. Cottony cushion scale (343) Search. The shield like protective cover or frothy covering can make it difficult to identify them as insects. Cottony cushion scales retain their legs, eyes, and antennae for their entire life and remain mobile. Photo 2.

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