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

Fruit spot disease

Causal organism :Beltaraniella humicola
Symptoms

• Black, circular spots appear that gradually enlarge and coalesce to form big spots and cause necrosis.
• The margin of spots varies from reddish to brown in colour.
• Infection is restricted to rind of the fruit and undesirable of the pulp.
Mode of survival and Spread

• The pathogen survives in infected plant parts as dormant mycelia and spreads through airborne conidia
Epidemiology

• The disease is severe during August to November months. When there is high humidity and the temperature between 20 and 27°C.
Management

• Clean cultivation.
• Spray nitrogen solution(urea %) or bleaching powder to enhance degradation of fallen leaves or affected plant parts.
• Prune all the affected branches and burn them.
• The pruned area should be coated with Bordeaux paste or COC paste.
• Spray thiophanate methyl (0.1%) or mancozeb (0.25%) or carbendazim (0.1%).