 Mexican bean beetle larva (left) and adult Mexican Bean Beetle The adult is 6 to 8 mm long, hemispherical, and yellow to coppery brown with 16 black spots arranged in three rows across its wings. This insect has no red or white markings. The larva is oval, yellow, and has six rows of long, branching, black-tipped spines on its body. Feeding damage is characterized by the skeletonized undersides of bean leaves, but pods may also be attacked. It is not yet an agricultural pest in the Pacific Northwest. Host plants: beans, cowpeas, soybeans.
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