59. YLD-3 Yellow leaf disease has been confused with nitrogen deficiency. The causal agent is believed to be a luteovirus.

La enfermedad de la hoja amarilla se ha confundido con la deficiencia de N. Esfuerzos por identificar al agente causante indican que puede ser un lúteovirus.

(Courtesy J. C. Comstock, copyright-free)

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