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Ricania speculum
Ricania speculum, common name Black planthopper or Ricaniid Planthopper, is a species of planthoppers belonging to the family Ricaniidae.[2] This species is considered a major agricultural pest for several crops in tropical and subtropical areas (apples, coffee plants, oil palms, Citrus species, etc.).[3][4][5][6] Distribution and habitatThis species is widespread in China, India, Indonesia, Japan, Korea, Philippines and Vietnam. Recently, it has been accidentally introduced in northern Italy, possibly with ornamental plants or crops.[7][8] This species can be found in the low-elevation mountains and prefers dark environments.[9] Description.JPG) Ricania speculum can reach a length of about 8 millimetres (0.31 in), with a wingspan of about 15 millimetres (0.59 in). These planthoppers have dark brown wings with central wavy horizontal bands and irregular transparent patches of different sizes.[9][10] The precostal area of the forewings shows dense transverse veinlets and the costal margin is distinctly convex near the base.[4] In males the tip of the abdomen is pointed, while in females is rounded. The final instar nymphs are white with dark brown markings and waxy secretions on the abdomen.[11] BiologyThese insects feed on sap that they suck from the leaves of the host plants. Ricania speculum has a single generation per year. The eggs overwinter in the bark of the branches waiting for the spring hatching. References
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