SESAMUM :: MAJOR DISEASE :: BACTERIAL LEAF SPOT

Bacterial leaf spot - Pseudomonas sesami
Symptoms
The disease appears as water-soaked yellow specks on the upper surface of the leaves. They enlarge and become angular as resticted by veins and veinlets. The colour of spot may be dark brown with shiny oozes of bacterial masses.

Pseudomonas sesami -Symptoms

Pathogen
The bacterium is gram negative aerobic rod with one or more polar flagella.
Disease cycle
The bacterium remains viable in the infected plant tissues. It is internally seedborne and secondary spread through rain splash and storms.
Management

• Keep the field free of infected plant debris.
• Spray with Streptomycin sulphate or oxytetracycline hydrochloride or streptocyclin at 100g/ha.