Which action is most directly associated with reducing disease incidence by improving growing conditions?

• A. Improve airflow and light availability
• B. Increase pesticide use
• C. Overwater frequently
• D. Remove thatch completely

Answer: (A)

Improving growing conditions directly affects disease by altering the environment around plants so pathogens have less opportunity to infect. Increasing airflow and light reduces leaf wetness and ambient humidity, helping leaves dry faster and creating a drier, less favorable microclimate for many fungi and bacteria. This weakening of the conditions that diseases need is a proactive way to lower incidence. In contrast, using more pesticides targets pathogens but doesn’t change the growing environment itself; overwatering creates more moisture, which actually promotes disease; and removing thatch, while it can affect moisture pockets, isn’t as direct or consistently beneficial for the overall growing conditions. So, improving airflow and light availability is the most direct way to reduce disease incidence through better growing conditions.