The presence of mold on your Grabba/Fronto Leaf can happen if you don’t take care of your leaves. Although, the growth of mold is a fairly common problem that occurs during extended periods of high humidity (>70% RH) at temperatures anywhere between 10 and 32.2°C. However, mold growth typically increases as the temperature increases.
If you have noticed white fuzz on your tobacco leaf, it is likely that you are dealing with a fungal infection known as powdery mildew. Powdery mildew is a common problem in many plants, including tobacco. It is caused by various species of fungi that thrive in warm and humid conditions.
Here are a few steps you can take to manage powdery mildew on your tobacco plants:
1. Remove infected leaves:
To prevent the spread of the fungus, carefully remove any leaves showing signs of powdery mildew. Dispose of them properly, away from your other plants.
2. Improve air circulation:
Increase the airflow around your tobacco plants by spacing them adequately. This helps reduce the humidity and creates an environment less favorable for the growth of powdery mildew.
3. Avoid overhead watering:
Moisture on the leaves can promote the growth and spread of powdery mildew. Instead, water at the base of the plant or use a drip irrigation system to keep the foliage dry.
4. Monitor and prevent:
Regularly inspect your tobacco plants for any signs of powdery mildew and take immediate action if you spot any. Preventive measures, such as maintaining proper plant hygiene, providing adequate sunlight, and avoiding excessive nitrogen fertilization, can help minimize the chances of powdery mildew development.