Today we're going to discuss the role of honeybees in agriculture, focusing on a phenomenon known as colony collapse disorder, or CCD. CCD first gained widespread attention in 2006 when beekeepers reported losing 30 to 90 percent of their hives. The cause remains unclear, but researchers have identified several potential factors, including pesticides, parasites, and habitat loss. One key parasite is the Varroa mite, which weakens bees by feeding on their bodily fluids and transmitting viruses. Additionally, certain neonicotinoid pesticides may impair bees' navigation and memory, making it harder for them to find flowers and return to the hive. However, scientists emphasize that CCD is likely the result of multiple stressors acting together, rather than a single cause. To address this, some beekeepers are now using integrated pest management, which combines biological controls, such as introducing predatory mites, with careful monitoring and reduced chemical use. While CCD has declined in recent years, honeybee populations still face significant threats, and research continues to focus on sustainable solutions for agriculture and ecosystem health.
❓ 题目 What does the professor imply about the cause of colony collapse disorder?
A. A) It is primarily caused by the Varroa mite alone.
B. B) It likely results from a combination of different stressors.
C. C) It has been completely solved by integrated pest management.
D. D) It only affects honeybees in agricultural areas.
✅ 正确答案
B) It likely results from a combination of different stressors.
