What role do leafhoppers play in plant pathology?

Leafhoppers play a significant role in plant pathology primarily as vectors for various plant viruses, including Beet curly top geminivirus. When leafhoppers feed on plants, they can acquire these viruses from infected plants and subsequently transmit them to healthy ones during their feeding process. This transmission can lead to the development of viral diseases in crops, causing symptoms such as stunted growth, leaf curl, and reduced yields.

Understanding the role of leafhoppers as vectors is crucial for managing plant diseases, as controlling the insect population can directly reduce the incidence of virus transmission and improve plant health. In contrast, the other options do not accurately reflect the primary impact leafhoppers have on plants; they do not enhance nutrient uptake, cause root rot, or enhance plant resilience.