Which weather pattern is most often associated with disease development such as Fusarium blight in cool-season turf?

Which weather pattern is most often associated with disease development such as Fusarium blight in cool-season turf?

• A. Dry, windy nights
• B. Warm, humid nights
• C. Cool, dry days
• D. Cold, sunny afternoons

Answer: (B)

Fungal diseases in cool-season turf take hold when the leaf surface remains wet and the conditions are warm enough for the pathogen to grow. Fusarium blight thrives under warm temperatures combined with high humidity, especially when nights stay humid and leaves stay damp into the morning. That persistent leaf wetness allows fungal spores to germinate, infect the tissue, and spread. So, warm, humid nights create the perfect environment for disease development. Dry, windy nights quickly dry the leaves, cool, dry days reduce moisture on the foliage, and cold, sunny afternoons also dry the surface—conditions that are much less favorable for Fusarium blight.

Fungal diseases in cool-season turf take hold when the leaf surface remains wet and the conditions are warm enough for the pathogen to grow. Fusarium blight thrives under warm temperatures combined with high humidity, especially when nights stay humid and leaves stay damp into the morning. That persistent leaf wetness allows fungal spores to germinate, infect the tissue, and spread. So, warm, humid nights create the perfect environment for disease development. Dry, windy nights quickly dry the leaves, cool, dry days reduce moisture on the foliage, and cold, sunny afternoons also dry the surface—conditions that are much less favorable for Fusarium blight.