MLN Field Guide


It is important to note that MLN symptoms vary widely depending on:

  • Germplasm
  • Time of Infection
  • Prevailing Environmental Conditions
  • Ratios of viruses infecting the plant

Symptoms can easily be confused with drought, micro-nutrient deficiency or stalk borer infestation.

The main symptoms of MLN are illustrated in the following sections.

Early Symptoms – Mild Mosaic and Mottling

Early Symptoms – Chlorosis and Mottling

Severe Chlorosis and Leaf Necrosis

Shortened Internodes and Severe Chlorotic Mottling

Dead Heart Symptoms

Premature Drying of the Husks

Poor or No Grain Filling