Abstract
The scale insects are small insects of the order Hemiptera, generally classified as the Superfamily Coccoidea. There are about 8,000 species of scale insects. Scale insects feed on a wide variety of plants, and scale species are considered pests. This review article is presenting the ecological aspects of some important scale insects and mealybugs infesting horticulture plants in Egypt. Armored scale insects (Hemiptera: Diaspididae) like Aulacaspis tubercularis Newstead, Pseudaulacaspis pentagona (Targioni-Tozzetti ), Parlatoria oleae (Clovee), Parlatoria ziziphi (Lucas), Fiorinia phoenicis Balachowsky and Hemiberlisia lataniae (Signoret). While, the soft scale insects (Hemiptera: Coccidae) showed by Pulvinaria tenuivalvata (Newstead), Pulvinaria psidii Mask., Saissetiacoffeae (Walker) and Ceroplastes floridensis Comstock. In case of mealybugs was represented with Planococcus ficus (Signoret) (Hemiptera: Pseudococcidae), Icerya seychellarum (Westwood) (Hemiptera: Monophelibidae) and Ferrisia virgata (Cockerell) (Hemiptera: Pseudococcidae). Family: Asterolecaniidae exampled by Asterolecanium pustulans Ckll. (Hemiptera: Asterolecaniidae).
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