Plant-herbivore-interactions
Guides
Chrysomela
leaf beetles
Chrysomela is a genus of leaf beetles in the family Chrysomelidae, containing approximately 40 species distributed across most continents except Australia. The genus is notable for its chemical defense mechanisms, with larvae producing volatile compounds derived from host plant chemistry. Several species are economically significant, including the cottonwood leaf beetle (C. scripta) in North America. Research on Chrysomela species has contributed to understanding plant-herbivore interactions, local adaptation, and chemical ecology.
Trirhabda
skeletonizing leaf beetles, goldenrod beetles
Trirhabda is a genus of skeletonizing leaf beetles in the family Chrysomelidae, comprising over 30 described species distributed in North America and Mexico. These beetles are specialist herbivores primarily associated with plants in the Asteraceae family, particularly goldenrods (Solidago), asters, and related composites. The genus has been extensively studied in ecological research due to its host-specific feeding habits, density-dependent dispersal behaviors, and potential keystone species effects on plant community dynamics. Several species are notable for sequestering defensive compounds and exhibiting complex movement behaviors in response to landscape structure and host plant quality.