Basil Mildew

Downy mildew on basil is a common fungal disease that can quickly kill off an entire basil plant if left untreated. It’s important to know what it looks like so you can take action to save your basil.

The first sign of downy mildew on basil is the yellowing of the leaves, starting at the bottom of the plant and working its way up. This is followed by a white, downy growth on the undersides of the leaves. The leaves will then start to curl and dry up, eventually turning brown and falling off. If left untreated, the entire plant will die.

Downy mildew on basil is caused by the fungus Peronospora belbahrii. This fungus thrives in cool and moist environments, so it’s important to take care when watering basil. Overwatering can lead to damp conditions that are perfect for the fungus to grow.

To save a basil plant from downy mildew, there are a few steps that can be taken. The first thing is to remove any infected leaves from the plant. This will help to slow the spread of the fungus and keep it from infecting other parts of the plant.

Next, make sure to water the basil at the base of the plant, rather than overhead. This will help to keep the leaves dry and reduce the chances of the fungus spreading.

You can also take preventative measures by treating the basil with a fungicide, such as neem oil. Be sure to follow the instructions on the label when using a fungicide, and be aware that it might not be 100% effective if the infection is severe.

Another way to prevent downy mildew on basil is by growing basil in a warm, dry environment, with plenty of sunlight, and enough space between plants. Avoiding overcrowding of basil plants is important as it decreases the air circulation and increases the humidity which is perfect for fungus to grow.

If growing basil indoors, use a fan to circulate the air and keep the leaves dry. It’s also important to avoid overcrowding in the indoor herb garden, as this can lead to increased humidity and the spread of fungal diseases.

It’s important to be vigilant in checking all basil plants for signs of downy mildew. If you spot any yellowing of the leaves or white, downy growth on the undersides, take action right away to save it.

Following these few tips and being mindful of the conditions in which the basil is growing, will help to prevent and control downy mildew and keep basil plants healthy and productive.