Mexican Bean Beetles
Pest Type: Insect
Damage to Plant: Leaves are chewed to lace; stems and pods may be eaten. Heavily infested plants may die.
Most common in the East, these copper colored beetles, each with 16 black spots, resemble ladybird beetles in size and shape. The legless, 1/3 inch long larvae are yellow with six rows of long, black-tipped spines along their backs. Both adults and larvae feed on leaf undersides.
Life Cycle: In spring, adults feed for a short time before laying clusters of yellow eggs on leaf undersides. Larvae soon hatch; they feed, then pupate attached to leaves. Adults can overwinter in wooded areas or garden debris. There are one to four generations a year.