Adult mexican bean beetles have a round yellow or orange body with 16 spots which fade with age. Their head is similar in color to the body, distinguishing them from many species of beneficial lady beetles which often have a black head. They also have a consistent pattern of spots on their wing covers which can be used to identify them.
Mexican bean beetle larvae are yellow or orange in color and are covered with spines.
Insecticides are available for controlling mexican bean beetles. The number of beetles present and the extent of defoliation, along with the ability of the plant to recover, should be considered when deciding if treatment is necessary. Always read and follow all label instructions.