Green stem syndrome

Area of impact: Stem

Description: Stems remain green long after they should be brown and mature. Usually occurs in individual scattered plants.

Pathogen involved: Unknown, but viruses such as bean pod mottle and soybean mosaic virus are most commonly associated with it.

Timing/Conditions: Usually appears as the crop is maturing.

Contributing factors: Viruses, dry soil, potassium deficiency, population density, genetic mutations and insect damage.

Management practices: Varietal selection may help but effective management strategies are not yet known.

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