Treatment is in two parts: spray under all leaves and around all stems thoroughly with horticultural oil. The following pesticides are effective for control of cottony maple leaf scales. Scale insects vary greatly in size but are usually about 1-5mm long. Icerya purchasi (common name: cottony cushion scale) is a scale insect that feeds on more than 65 families of woody plants, most notably on Citrus and Pittosporum.Originally described in 1878 from specimens collected in New Zealand as pests of kangaroo acacia and named by W.M. Choose from the five general types of insect and mite damage to landscape plants. Table: Natural enemies of Cottony cushion scale, Icerya purchasi (Hemiptera: Monophlebidae), from Plant-SyNZ database (23 March 2018). This is best applied when the scale are in their younger nymph stages, so make sure to regularly check your landscape for pests. There are two general types of scale– armored scale and soft scales. Agricultural experts reasoned that there must be something in Australia that controlled its population there. Citrus trees are simple-to-grow flowering plants and provide a lovely fragrance for a home or garden. This is the optimum time for control. BIOLOGICAL INSECTICIDES: An insecticidal soap (such as Safer's, etc.) When scale insects are not controlled by biological or chemical means, high populations damage leaves, fruit, twigs, branches, and/or tree trunks. The shield like protective cover or frothy covering can make it difficult to identify them as insects. Cottony cushion scale is about 5mm long, reddish brown and has a dome shaped white mealy coat. The protective covering can be hard and waxy to soft and foam-like. 1999). And adults are difficult to kill because of their protective scales. If you have just a few pests or they are located on an indoor plant, you can just use alcohol on a cotton-tipped swab and literally "wipe away" the problem. common name: cottony cushion scale scientific name: Icerya purchasi Maskell (Insecta: Hemiptera: Margarodidae) Introduction - Distribution - Description - Host Plants - Economic Importance - Management - Selected References Introduction (Back to Top). Find related pest control products, articles and questions on Cottonycushion Scale ( Cra. Biological control; Chemicals; Aphids, mealybugs and scales. Icerya purchasi, the cottony-cushion scale, is originally from Australia but has become a cosmopolitan pest of agriculture. In 1944, Professor H.S. ), in the desert citrus areas of California was upset so severely by insecticidal drift from surrounding treated areas that chemical control became necessary. It is also reported on beautyberry, jasmine, mulberry, and hydrangea. As a result, plant growth is inhibited and fruit yield is decreased. NATURAL CONTROLS: Ladybird beetles (Ladybugs) are a natural scale control. Biological Control Cottony cushion scale is usually well controlled by two introduced natural enemies. Usually scale populations increase slowly over a period of weeks or months on isolated trees or areas within a grove. Cottony-cushion scale, (Icerya purchasi), a scale insect pest (order Homoptera), especially of California citrus trees. Dr. Purchas who, [he] believe[d], first found it". Cottony cushion scale, European elm scale, soft scales, and certain other scales secrete sticky honeydew. The first nymphs can crawl up to 1 yard in 10 minutes, and they tend to crawl up to the leaves and twigs to feed. Cottony cushion scale are sap sucking insects that have protective coverings. For cottony cushion scale, there are some control options. They are generally easy to keep in line but hard to permanently eradicate. The female scale is easily indentified with a long tail attached at the end holding the egg sac. Madeira mealybug (photo by Sally Tucker, Bugwood.org) Figure 20. Some of the scale insects produce honeydew on which sooty mold will form. Armored scales, oak pit scales, and sycamore scale do not excrete honeydew. If you have a heavy infestation outdoors, prune away the stems with the most scales. One insecticide, for example, controls most soft scales but does not control armored scales or cottony cushion scale. Fast Free Shipping On Your Entire Order * Hello, Sign In My Account . Cottony cushion scale is commonly encountered on ornamental bamboo (Nandina) and the shrub pittosporum. Figure 18. Page last updated: Wednesday, 14 November 2018 - 1:37pm. Cottony cushion scale and mealybugs obviously must be terminated. They are mainly pests of indoor plants, hedges and of orchards. Both adult and immature beetles feed on eggs and nymphs of the scale. 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