How to Treat Alternaria solani on Tomato Plants

Tomato plants are a popular vegetable to grow in the garden, but they can be susceptible to various diseases. Alternaria solani, also known as early blight, is a common fungal disease that affects tomato plants. It may cause leaves and stems to turn yellow and then brown, eventually wilting and dying. But don’t worry - here are some tips on how to treat Alternaria solani:

1. Practice Proper Garden Hygiene

One of the best ways to prevent Alternaria solani from affecting your tomato plants is by practicing proper garden hygiene. This includes removing any dead plant tissue or debris from the garden, such as leaves or fruit on the ground. Be sure to also clean your garden tools and gloves regularly to prevent the spread of disease from plant to plant.

2. Apply Fungicides

If the disease has already affected your tomato plants, you can apply fungicides to slow down its spread. Be sure to follow the instructions on the label and apply the fungicide to both sides of the leaves, as well as the stems. When purchasing a fungicide, look for one that specifically targets Alternaria solani.

3. Increase Air Flow

A lack of air flow can also contribute to the spread of Alternaria solani. To help prevent this, be sure to space out your tomato plants so they have adequate room for air to circulate. Prune any excessive foliage, especially the lower leaves, to increase air flow and decrease humidity.

4. Water from the Bottom

Watering your tomato plants from the top can contribute to the spread of Alternaria solani. The water that lands on the leaves can create a humid environment, which is perfect for the growth of the fungus. To avoid this, water your plants from the bottom. Placing water in a saucer under the plant or using a drip irrigation system are great options.

5. Consider Resistant Varieties

If you live in an area with a high risk of Alternaria solani, consider planting tomato varieties that are resistant to the disease. Talk to your local nursery or do some research to find out which varieties are available in your area.

By taking these precautions and treating Alternaria solani in a timely manner, you can prevent the disease from spreading and protect your tomato plants.