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

Wilt

Causal organism: Sclerotium rolfsii
Symptoms

• The organism colonize at epidermal layer at collar region of plant, discoloration of collar region, girdling
• Then the plant start drooping and drying then finally rotting takes place.
Etiology

• Septate mycelia, sclerotial bodies are vegetative, asexual structures and mycelial strands; sexual spores are ascospores borne on apothecium
Taxonomy

Kingdome: Fungi
Division: Deuteromycota
Class: Deuteromycetes
Order: Mycelia Sterilia
Family: Mycelia Sterilia
Genus: Scleotium
species: rolfsii

Epidemiology

• Warm weather 30-32^oC,RH 70-80%,soil moisture
• Primary Sources of Inaculam: Sclerotial bodies present in debris
• Secondry Sources of Inaculam: Mycelial strands
Life Cycle

Management

• Affected debris destruction
• Summer ploughing
• Crop rotation
• Soil sterilization
• Biological agent
• Carbendizim 0.1% or Mancozeb 0.25% as soil drench.