Chrysocoris fascialis, commonly known as the black-striped jewel bug, is a brightly colored shield bug belonging to the family Scutelleridae. It is widely distributed across Southeast Asia and East Asia, including Taiwan. This insect is noted for its striking appearance and distinctive black stripes.
Physical Characteristics
The black-striped jewel bug is medium-sized, measuring about 8-12 mm in length. Its most notable feature is the vibrant yellow elytra (wing covers) adorned with symmetrically arranged black stripes or spots. These stripes extend longitudinally along the back, creating a vivid and striking pattern. The head and thorax are also bright yellow, contrasting sharply with the black markings. When at rest, the wings lie flat over the back, enhancing the visibility of their colors and patterns.
Behavior and Diet
Chrysocoris fascialis primarily feeds on plant sap, using its specialized mouthparts to pierce plant tissues and extract nutrients. It is commonly found in fields, gardens, and other areas with abundant vegetation, favoring the sap of fruit trees and crops. As a result, it is sometimes considered an agricultural pest. The black-striped jewel bug is most active during warm seasons, particularly in spring and summer.
Ecological Role
In the ecosystem, the black-striped jewel bug plays a dual role. On one hand, as a phytophagous (plant-eating) insect, it can impact plant health and growth, especially when present in large numbers, potentially causing damage to crops. On the other hand, it serves as a food source for predatory insects and birds, contributing to the balance of the food web.
Distribution and Conservation
In Taiwan, the black-striped jewel bug is widely distributed, thriving in various low-altitude habitats such as fields, orchards, and gardens. Although they are quite adaptable, excessive pesticide use and habitat destruction pose threats to their populations. Due to their role in the ecosystem, protecting their habitats and using pesticides judiciously can help maintain ecological balance and biodiversity.