These seed borne diseases have no cure once infected. For more information on potato diseases click here. There are two important potato diseases that spread during the season - Early blight and late blight . For more information on each of these disease click on their name. There control is basically the same - fungicides applied on a regular basis after plants form different rows begin to touch.
Fungicides are preventative only.
Organically elemental sulfur dust and milk sprayed on the plants can help, but these are only a partial cure. A strong healthy plant is also one of the best disease controls. Again a healthy plant helps a plant resist insect damage. Insect pests that are a major concern are Colorado potato beetle, leafhoppers, aphids and armyworms. For descriptions and control measures of potato pests click here .