What Do Brown Spots On Sunflower Leaves Mean?

Helianthus annuus L. commonly known as sunflower is a biennial herbaceous plant native to North America. It has been cultivated for its edible seeds, oil, and nutritious leaves and stems.

What Are The Brown Spots On Sunflower Leaves?

The brown spots on sunflower leaves are actually caused by a fungal disease known as sunflower chlorosis. Sunflower chlorosis is most commonly found in ...

Sunflower chlorosis is caused by a fungus known as Cercospora Kikuchi. The fungus spreads via wind-borne spores and infects the young leaves of sunflowers.

What Causes Sunflower Chlorosis?

What Are The Best Ways To Control Brown Spots On Sunflower Leaves – Chlorosis?

The best way to control sunflower chlorosis is to apply a fungicide that is specifically designed to control this disease.

Bordeaux Mixture is one of the most effective sunflower fungicides. It is an emulsifiable concentrate with a unique formulation that includes a combination of copper and mancozeb.

Bordeaux mix

Sun-cure is a registered pesticide for sunflower that can be applied once per year as a pre-emergence treatment or twice during the growing season as a post-emergence treatment. It ...


The brown spots on sunflower leaves are an indication of fungal infection and the disease is highly infectious. The disease can be controlled by keeping the infected plants away from healthy ones.


What Do Brown Spots On Sunflower Leaves Mean?