Causal Agent:
Phytophthora infestans
Biology:
Pathogen of potato and a few related plants; infection encouraged by humid and wet conditions.
Dispersal:
Sporangia move in the wind; zoospores in water.
Fungicide Resistance:
P. infestans is well-known to become resistant to site-specific fungicides used against it. Fungicides should be rotated frequently to prevent resistance.
Management:
Further Reading:
Late Blight Information from University of Idaho