In blister beetles, which chemical is produced by adults?

In blister beetles, which chemical is produced by adults?

• A. Formic acid
• B. Cantharidin
• C. Lactic acid
• D. Citric acid

Answer: (B)

Blister beetles rely on a specialized chemical defense produced by adults. They secrete cantharidin, a potent blistering toxin stored in their defense glands. This chemical serves to deter predators and handling threats, making it the distinctive defensive compound associated with adult beetles. Formic acid, lactic acid, and citric acid are common metabolic or microbial byproducts in many organisms and environments, but they do not function as the blister beetle’s primary defensive toxin. So, cantharidin is the correct answer.

Blister beetles rely on a specialized chemical defense produced by adults. They secrete cantharidin, a potent blistering toxin stored in their defense glands. This chemical serves to deter predators and handling threats, making it the distinctive defensive compound associated with adult beetles. Formic acid, lactic acid, and citric acid are common metabolic or microbial byproducts in many organisms and environments, but they do not function as the blister beetle’s primary defensive toxin. So, cantharidin is the correct answer.