Potato Production Information

Host resistance is an important tool for managing diseases. Potato cultivars vary in susceptibility to common diseases including late blight, early blight and common scab.

Early blight is caused by the fungus Alternaria solani and is a common problem for potato growers. Early blight is most prevalent in regions with warm weather that alternates between dry and wet as in regions with dew or fog. The lesions caused by early blight lead to a reduction of leaf surface area which then leads to reduced yields.