Eyespot on sugarcane

Picture of eye spot disease on sugarcane

Cause of disease

Eye spot is transmitted by conidia, which are abundantly produced on leaf lesions and dispersed by wind and rain.

High humidity and dew formation also help the germination of fungal spores.

Colonization of younger leaves is also faster than in older leaves.

Transmission does not occur through seeds.

Mechanical transmission by equipment and human activity is also not a problem.

Eye spot

Causative factor : Helmintho sporiumsa cchari

Symptoms and damages

Symptoms appear in the form of oval brown to red spots, 0.4 to 0.5 mm long and 0.5 to 2 mm wide, with yellow-brown margins.

The brown color extends upward to the top of the leaf, where multiple infections occur, and the spots can connect with each other so that the entire leaf becomes infected.

Symptoms appear more on younger leaves. In severe infestations, the leaves rot and fall. This is known as the acute form of the disease.

Prevention and treatment

Adopting the following measures can reduce the incidence of the disease to a minimum. It is sprayed with 0.2% copper oxychloride or 0.3% mancozeb, with 2 to 3 sprays at a rate of one spray every 7 days.

Symptoms

Symptoms of the disease initially appear as red spots on both sides of the leaf. Later, oval ulcers with red to brown margins appear.

Within 1-3 days of inoculation, sugarcane leaves infected with Bipolaris sacchari appear as small red spots on both surfaces of the leaf.

The spots then become oval along the axis parallel to the main veins. The margin color ranges from red to brown. Then the center of the spot becomes gray or tan. The spots come together and form long lines.

Sugarcane seedlings infected with the blight may die 12-14 days after planting as a result of top rot in severe cases.

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