What does a "limited host range" imply about a plant pathogen?

What does a "limited host range" imply about a plant pathogen?

• A. It can infect a wide variety of plants
• B. It can infect only a small number of host species
• C. It affects only soil pathogens
• D. It can rapidly evolve to attack any plant

Answer: (B)

A "limited host range" in the context of a plant pathogen means that the pathogen is able to infect only a small number of specific host species rather than a wide variety of plants. This characteristic is significant because it indicates that the pathogen has specialized adaptations that allow it to interact with particular plant species, and it may be dependent on certain physiological or biochemical traits found only in those hosts. Pathogens with limited host ranges can often exert a substantial impact on the specific plants they can infect, as they may have specific life cycles, infection mechanisms, and environmental conditions they require to thrive. This specificity can also influence management strategies, as controlling the spread of a limited-host pathogen often involves focusing on the particular species that are susceptible to the pathogen rather than a broader range of plants. Understanding this concept is crucial for effective pest management and plant health, as it helps in identifying susceptible crops and developing specific control measures.

A "limited host range" in the context of a plant pathogen means that the pathogen is able to infect only a small number of specific host species rather than a wide variety of plants. This characteristic is significant because it indicates that the pathogen has specialized adaptations that allow it to interact with particular plant species, and it may be dependent on certain physiological or biochemical traits found only in those hosts.

Pathogens with limited host ranges can often exert a substantial impact on the specific plants they can infect, as they may have specific life cycles, infection mechanisms, and environmental conditions they require to thrive. This specificity can also influence management strategies, as controlling the spread of a limited-host pathogen often involves focusing on the particular species that are susceptible to the pathogen rather than a broader range of plants. Understanding this concept is crucial for effective pest management and plant health, as it helps in identifying susceptible crops and developing specific control measures.