CDFA Pest Prevention Plant Regulation Practice Exam

Which beetle is known scientifically as Leptinotarsa decemlineata?

1. Colorado potato beetle

2. Cereal leaf beetle

3. Sweet potato weevil

4. None of the above

The correct answer is: Colorado potato beetle

The beetle known scientifically as Leptinotarsa decemlineata is indeed the Colorado potato beetle. This insect is specifically recognized for its significant impact on potato crops, as it is a major pest that feeds on the leaves of potato plants. Understanding the scientific nomenclature helps in correctly identifying the pest, as it can often be more precise than common names which may vary by region. The Colorado potato beetle is characterized by its yellow and black striped appearance and has a distinct lifecycle that includes both larval and adult stages, both of which are detrimental to potato agriculture. This pest is well-documented in agricultural entomology, making it critical for pest management practices. In contrast, the cereal leaf beetle and sweet potato weevil refer to different species with their own scientific classifications, thus reinforcing that Leptinotarsa decemlineata refers exclusively to the Colorado potato beetle.