Turcicum Leaf Blight


Turcicum Leaf Blight

Setosphaeria turcica


In a Nutshell

    Small, water-soaked spots appear on lower leaves firstSpots slowly grow into tan, cigar-shaped necrotic lesions with distinct pale green, water-soaked bordersLesions later coalesce and engulf a large part of the leaf blade and stalk, leading to death and lodging

Hosts: %1$s

· Sorghum · Maize


The symptoms appear as small, oval, water-soaked spots on the lower leaves first. As the disease progresses, they start to appear on the upper part of the plant. Older spots slowly grow into tan, long cigar-shaped necrotic lesions with distinct dark specks and pale green, water-soaked borders. These lesions later coalesce and engulf a large part of the leaf blade and stalk, sometimes leading to death and lodging. If the infection spreads to the upper parts of the plant during the development of the cob. Severe yield losses can occur (up to 70%).


The fungus overwinters in the soil or on plant debris. Rainfall, night dew, high humidity and moderate temperatures favor the dispersion of the the fungus. Carried by wind or rain splashes it first spreads from the soil onto the lower leaves of young maize plants. Rainy conditions and poor field practices favor its spread to other plants and within fields. Optimal temperatures for infection are in the range of 18 to 27°C during the growing season. A prolonged period of 6 to 18 hours of leaf wetness are also necessary. Sorghum is another favorite host of the fungus.

Biological Control

Bio-fungicides based on Trichoderma harzianum, or Bacillus subtilis can be applied at different stages to decrease the risk of infection. Application of sulfur solutions is also effective.

Chemical Control

An integrated approach with preventive measures together with careful cultural practices is recommended. An early preventative fungicide application can be an effective way of controlling the disease. Otherwise, fungicides can be applied when the symptoms are visible. Products containing carboxin, chlorothalonil or mancozeb can be applied. Seed treatments are not recommended.

Preventive Measures

    Grow resistant or tolerant varietiesEnsure balanced nutrient supply and avoid excessive nitrogen fertilizationWeed regularly in and around the fieldRotate with soybeans, beans, or sunflower to avoid extensive spreadingPlow deep to bury plant debris and reduce the amount inoculum in the soil


Regional Weather

Get detailed forecast and actual weather data.

Plantix offers detailed weather information on the following issues:



Air Pressure


Wind speed

Plantix Community

Get in touch with experts around the world.

Post your questions

You can post your questions and pictures and get feedback from other farmers or gardeners. Plantix' experts will answer your questions related to plant diseases and pests.


Exchange with Plantix users around you, in your language and related to the crops you grow.

Global Community

Connect to farmers, gardeners, experts and interested people around the world that discuss plant diseases, remedies and best practice for sustainable farming.

AI-Driven Disease Detection

Instant diagnostics and solutions based on your picture

Image Recognition

Plantix analyzes your picture within a few seconds and gives you instant feedback on your plant problem.

Customized Management Options

On top of the detection result, Plantix offers you a detailed description of possible solutions - both biological and conventional.

Preventive measures

Plantix offers information on preventive measures to protect your crop from the next attack.