Post harvest diseases of bhendi
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Alternaria rot - Alternaria alternata
Rhizoctonia rot - Rhizoctonia solani
Alternaria rot
Alternaria alternata
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Dark grey, slightly sunken irregular lesion, developing
lengthwise
Grey cottony mycelial mat bearing conidia appeared on the
surface of developing lesions
When diseased pod cut transversally – blackened necrotic
tissues
Fungus
 Conidiophores - simple straight or curved, sometimes
branched
 Yellow brown to medium golden brown colour
 Conidia - transverse and longitudinal septa, pale to dark brown
in colour, produced in short chains
Rhizoctonia rot
Rhizoctonia solani

Pod - greenish color turning brown, and the infected tissues
fully covered with mycelia

Internally, immature seeds and placenta were infected and
the diseased tissues were light brown to black

Externally, mycelia tend to be fluffy and lighter in color,
forming a large number of dark sclerotia on the fruit surface
A. Pods showing distinct degrees
of rotting
B. Rotting of placenta tissues and
immature seeds
Fungus
 Produces pycnidia and sclerotia
 Pycnidiospores - hyaline, single celled, ovate to ellipsoid
Mode of spread and survival
 R. solani overwinters in soils as mycelia on plant debris and
as dark brown sclerotia that remain in soil for long periods
Control
 Plant debris from previous crops should be removed before
planting

Quintozene – sprayed in the soil before sowing-effective
control
Phoma canker (Phoma exigua)
 Water soaked lesion appear on fruits
 Black spots with irregular margin
 Black area - pycnidial formation
 80-90% fruit loss post harvest rot of okra pods rhizoctonia solani
in brazil
 Completely rotted, the pod's typical greenish color turning brown
and the infected tissues fully covered with mycelia
 Internally, immature seeds and placenta infected
 Diseased tissues were light brown to black .
 Externally, mycelia tend to be fluffy and lighter in color, forming a
large number of dark sclerotia on the fruit surface