Fungicide For Seed Potatoes To Prevent Problems Growing Potatoes

seed-potatoes-storage
Image by Greg Traver

By Heather Rhoades

One of the biggest problems growing potatoes in the garden is the possibility of fungus forming on the potatoes. Whether it be late blight fungus, which was responsible for Irish Potato Famine, or early blight, which can be just as devastating to a potato plant, potato fungus can destroy your potato plants. But, when you use fungicide for seed potatoes, you can greatly reduce your chances of fungus on your potatoes.

Causes of Fungus on Potatoes

The appearance of potato fungus happens mainly due to infected seed potatoes or planting in infected soil. Most potato fungi not only attack potatoes, but can survive (though may not kill) on other plants in the nightshade family, such as tomatoes and peppers.

Using Potato Fungicides to Control Fungus on Potatoes

An excellent way to prevent blight fungus on your potatoes is to make sure to treat your seed potatoes with a fungicide before you plant them. Though there are many potato specific fungicides available in the gardening market, in actuality, most general fungicides will work just as well.

After you have cut up your seed potato, thoroughly coat each piece in the fungicide. This will help to kill any potato fungus that may be on the seed potato pieces.

You will also want to treat the soil that you will be planting the potatoes in, especially if you have had fungus problems on potatoes in the past or have grown other members of the nightshade family (which may carry potato fungus) in that spot before.

To treat the soil, pour fungicide evenly over the area and mix it into the soil.

Making Homemade Fungicide for Seed Potatoes

Below you will find a homemade fungicide recipe. This potato fungicide will be effective against weaker potato fungi, but may not be as effective against more resistant strains of late potato blight.

Homemade Potato Fungicide Recipe

2 tablespoon of baking soda
1/2 teaspoon of oil or bleach free liquid soap
1 gallon of water

Mix all ingredients thoroughly. Use as you would a commercial potato fungicide.

This article was last updated on

Related Articles
Did you find this helpful?
Share it with your friends!
Additional Help & Information

Didn't find the answer to your question? Ask one of our friendly gardening experts.

Do you know anything about gardening? Help answer someone's gardening question.

Read more articles about Potatoes.

Search for more information

Use the search box below to find more gardening information on Gardening Know How: