How can we treat rose black spot?

How can we treat rose black spot?

• A. By applying fertilizer.
• B. By increasing watering.
• C. Through the use of fungicides and destroying affected leaves.
• D. By pruning healthy growth only.

Answer: (C)

Rose black spot is a fungal disease that thrives on wet leaves, so managing it focuses on removing sources of the fungus and protecting new growth with a fungicide. Destroying infected leaves lowers the number of spores that can start new infections, cutting the cycle of disease. Using a fungicide provides protection for the remaining healthy tissue and helps prevent further spread, especially during wet, cool weather when the fungus is most active. To maximize effectiveness, combine this with cultural practices: water at the base to keep leaves dry, improve air circulation by pruning, and clean up and dispose of fallen leaves so the fungus doesn’t overwinter and re-infect next season. Fertilizer alone won’t treat the disease, and more watering or pruning only healthy growth won’t remove the existing infection.

Rose black spot is a fungal disease that thrives on wet leaves, so managing it focuses on removing sources of the fungus and protecting new growth with a fungicide. Destroying infected leaves lowers the number of spores that can start new infections, cutting the cycle of disease. Using a fungicide provides protection for the remaining healthy tissue and helps prevent further spread, especially during wet, cool weather when the fungus is most active. To maximize effectiveness, combine this with cultural practices: water at the base to keep leaves dry, improve air circulation by pruning, and clean up and dispose of fallen leaves so the fungus doesn’t overwinter and re-infect next season. Fertilizer alone won’t treat the disease, and more watering or pruning only healthy growth won’t remove the existing infection.