Blue Mold
Blue mold, or peronospara tabacina, is a fast moving, airborne fungus that can ruin a tobacco field in just a few days. It flourishes in cool, cloudy weather with light rain and riddles tobacco leaves with small blemishes. Honduras once suffered from chronic, virulent outbreaks of blue mold, and it has been a problem virtually everywhere tobacco is grown. Some tobacco hybrids are less susceptible to blue mold than others.