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 habitat
This 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
Nymph of Ricania speculum
Ricania speculum can reach a length of about 8 millimetres (0.31in), with a wingspan of about 15 millimetres (0.59in). 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]
Biology
These 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.
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