Diseases of fruit plantation medicinal and aromatic crops (2+1)

Fusarium wilt

Causal organism: Fusarium fusarioides (Farg & Cif)
Symptoms
• The disease appears as minute specks towards the leaf margin.
• The spots are brown, circular to irregular in shape which coalesce and form big dark brown necrotic blotch at a later stage.
Epidemiology

• The disease is severe during August to November with when there is high humidity and the temperature between 20 and 27°C.
Mode of survival and Spread

• The pathogen survives in infected plant parts and spreads through airborne conidia
Life cycle
Management
• Clean cultivation, i.e. sanitation, includes removal of weeds. On fallen leaves or infected plant parts, spray nitrogen solution (urea %) or bleaching powder to enhance these degradation process.
• Prune infected and burn infected branches and pruned materials. The pruned area should be treated with Bordeaux paste or COC paste.
• Spray thiophonate methyl (0.1%) or mancozeb( 0.2%) or cardendazim( 0.1%) on trees.