What is Blight in Tomato Plants

Blight is a common disease that affects tomato plants, causing them to wilt and die. It is caused by two different types of fungi – early blight and late blight – which attack the leaves, stems, and fruits of the tomato plant.

Symptoms of Early Blight

Early blight is caused by the fungus Alternaria solani and typically appears on the lower leaves of the tomato plant. The first sign of this disease is the appearance of small, circular spots on the leaves. These spots will gradually grow in size and turn yellow, eventually causing the leaves to wilt and die. If the infection is severe, the spots may also appear on the stem and fruit of the plant.

Symptoms of Late Blight

Late blight is caused by the fungus Phytophthora infestans and is a more serious disease than early blight. The first sign of late blight is the appearance of dark, water-soaked spots on the leaves. These spots will quickly spread and turn brown, causing the leaves to wilt and die. The stem and fruit of the plant may also become infected, resulting in a soft, rotten appearance.

Prevention and Treatment

There are several steps that can be taken to prevent and treat blight in tomato plants. Here are some tips:

Plant tomato varieties that are resistant to blight.

Avoid planting tomatoes in the same spot year after year.

Avoid watering tomato plants from above, as this can spread the spores of the fungus. Instead, water the plants at the base.

Remove any infected leaves immediately, and dispose of them in the trash. Do not compost them.

If the infection is severe, fungicides may be necessary. Be sure to read and follow the instructions carefully.

Conclusion

Blight is a serious disease that can result in the loss of an entire tomato harvest. However, by following the prevention and treatment tips outlined above, it is possible to protect your plants and ensure a successful harvest. If you suspect that your tomato plants may be infected with blight, be sure to take action immediately to prevent the spread of the disease.