Sugarcane Pineapple Disease

Disease

Sugarcane Pineapple Disease

Ceratocystis paradoxa

fungi

In a Nutshell

    Chlorotic inside the internodesIn the first weeks, infected setts smell like overripe pineapplesShoots decompose slowly and roots fail to form

Hosts: %1$s

· Sugarcane

Symptoms

The fungus enters the planting material through the cut ends or through wounds produced by insects. It then spreads rapidly through the internal tissues. These become red first and later turn to brownish-black and black. The rotting process leads to the formation of cavities and emits a characteristic odour of overripe pineapples. This smell can linger for several weeks. Roots of infected crops fail to form, incipient buds fail to grow, and those that do, die back or remain stunted.

Trigger

The pest occurs in the first weeks after planting. The fungus spreads by spores in the wind or water, and also in the irrigation water. Insects, especially beetles, can distribute spores by boring into the setts. Spores can survive in soil for at least a year. On infected plants they can survive several months. Places where water remains after rain can increase susceptibility to the disease. Temperatures around 28°C are most favorable for sporulation and growth of the fungus. Prolonged droughts also increase the susceptibility of the cane to the pathogen.

Biological Control

In case of a delay in the planting season, treat setts in hot water (at 51°C) for 30 min before planting. Look for stalks that have not sprouted in the field and split them to detect signs of the disease (rotting and foul odour).

Chemical Control

Always consider an integrated approach with preventive measures together with biological treatments if available. A treatment with fungicides can be economically unfavorable.

Preventive Measures

    Grow resistant varietiesUse healthy planting setts with at least three nodes longSelect rapidly growing sprout varieties after plantingMake sure that the fields have good drainagePlan the planting carefully to avoid the most adverse weather conditionsDestroy leftover harvest trash of affected crops by burning




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