*Serious experienced growers only !*

test for the fungus by simply rubbing a finger on the affected spots. If some of the rust rubs off onto your fingers, then it is rust mold. If it does not rub off, are nutrients problem, This fungus loves temperatures from 60° to 80° F with high humidity

Hi First of all, I want to emphasize that under no circumstances should you perform foliar spraying once the flowering stage has begun. Water on the leaves can promote the development of diseases and cause moisture issues in the buds, which can affect the quality of the harvest. It is important to limit watering to the substrate and avoid wetting the leaves during this crucial stage. Looking at the image you shared, it appears that your plants are experiencing a condition known as septoria leaf spot. Septoria leaf spot is a common fungal disease that affects many plants, including cannabis. It is characterized by the appearance of brown spots or necrosis on the leaves, accompanied by a yellow halo around the spots. To address this issue, I would recommend taking the following measures: Remove affected leaves: If the leaves show symptoms of septoria leaf spot, it is important to remove them immediately to prevent the spread of the disease. Make sure to properly dispose of the diseased leaves, away from your healthy plants. Improve air circulation: Septoria leaf spot tends to spread in humid environments with poor air circulation. Ensure good ventilation in your growing space by using fans to keep the air moving and reduce humidity. Adjust humidity levels: Reducing humidity can help prevent the development and spread of fungal diseases. Make sure to maintain appropriate humidity levels in your grow tent, avoiding excess moisture that promotes fungal growth. Consider fungicidal treatments: If the disease persists despite your preventive efforts, you may consider using specific fungicidal treatments for controlling septoria leaf spot. Remember, prevention and early management of diseases are crucial for maintaining healthy plants and maximizing production. It is always recommended to seek advice from experts or professionals in the field for personalized guidance. I hope this information is helpful to you, and I wish you good luck in managing septoria leaf spot and your future cultivation endeavors.