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Sugarcane Common Rust

Sugarcane Common Rust

Puccinia melanocephala

fungi

In a Nutshell

    Initial symptoms are elongated yellowish leaf spotsSpots change colour to reddish-brown graduallyHeavily affected leaves could get necrotic

Hosts: %1$s

· Sugarcane

Symptoms

The initial symptoms of sugarcane common rust are elongated yellowish leaf spots, of about 1-4 mm length. With the development of the disease (primarily on the lower leaf surface) the spots elongate parallel to the leaf venation. They enlarge up to 20 mm in length and one to three mm in width. They also turn into orange-brown or red-brown flecks with a slight but definite chlorotic halo. Later, the rust pustules fuse. This leads to rupture of the leaf epidermis and the development of necrotic areas. Lesions are usually more abundant closer to the leaf tip and decrease in number toward the base.

Trigger

98 % relative humidity and cool nights followed by warm days with temperatures between 20°C and 25°C favour Common Rust. Continuous leaf wetness (nine hours or more) also supports the spread of the disease. Under favorable conditions the infection cycle of Common Rust (Puccinia melanocephala) is less than 14 days long. Plants aged two and six month are most susceptible to Common Rust.

Biological Control

Sorry, we don't know of any alternative treatment against Puccinia melanocephala . Please get in touch with us in case you know of something that might help to fight this disease. Looking forward hearing from you.

Chemical Control

Always consider an integrated approach with preventive measures together with biological treatments if available. A treatment with fungicides can be economically unfavorable and not practical.

Preventive Measures

    Grow resistant cultivarsEnsure balanced nutrient status of the soilEnsure adequate water supply of the soil during growth periodApply long furrow or paired row planting methodsRemove and burn leftovers and harvest trash of affected crops