What is an effect of prolonged wet, cool weather on sorghum seedlings?

Prolonged wet, cool weather can significantly impact sorghum seedlings by increasing their susceptibility to diseases. Under these conditions, fungal pathogens thrive, which can lead to issues such as root rot and other water-related diseases. Optimal moisture and cool temperatures create an environment that encourages the spread of diseases like downy mildew and charcoal rot, which can harm young plants.

This increased risk is especially critical in sorghum, as young seedlings are more vulnerable to stress, and the adverse effects of disease can stunt growth or even lead to plant death. Other options, such as reducing seed viability or faster growth rates, do not line up with the physiological responses of sorghum seedlings in the context of wet and cool weather. Therefore, the correct answer focuses on the detrimental health effects that such weather conditions can have on young crops.