Okra diseases A lecture on ToT training of FFS By Mr Allah Dad Khan Provincial Coordinator IPM KPK MINFAL Islamabad

2. Okra Diseases
A
Lecture To ToT trainees ( FFS)
By
Mr. Allah Dad Khan
Provincial Coordinator IPM KPK
MINFAL Pakistan

9. White mold
Sclerotinia sclerotum
Symptoms
• Flowers covered in white,
cottony fungal growth;
small, circular, dark green,
water-soaked lesions on
pods leaves and branches
which enlarge and become
slimy; cottony white growth
may be visible on lesions
during periods of high
humidity; death of branches
and/or entire plant

10. Cercospora Leaf Spots:Cercospora
malayensis, C. abelmoschi
Symptoms
• two species of Cercospora
produce leaf spots in
bhendi. C. Malayensis
causes brown, irregular
spots and C. abelmoschi
causes sooty black, angular
spots.Both the leaf spots
cause severe defoliation
and are common during
humid seasons.

11. Charcoal rot
Macrophomina phaseolina
Symptoms
• Discoloration of stem at soil
line; cankers on stem may
spread upwards; leaves may
wilt and drop from plant;
numerous small black
sclerota (fungal fruiting
bodies) develop in affected
tissues and can be used to
diagnose the disease

12. Fusarium wilt
Fusarium oxysporum
Symptoms
• Wilting of cotyledons and
seedling leaves; cotyledons
become chlorotic at the edges
and then necrotic; older plants
exhibit symptoms of wilting
and leaf chlorosis; wilting is
usually gradual but may be
pronounced after heavy
summer rain; if infection is
severe plants become stunted
and may be killed; vascular
system of infected plants
becomes discolored and can
be seen by cutting the stem

13. Southern blight
Sclerotium rolfsii
Symptoms
• Sudden wilting of leaves;
yellowing foliage; browning
stem above and below soil;
browning branches; stem
may be covered with fan-
like mycelial mat

14. Root-knot nematode
Meloidogyne spp.
Symptoms
• Galls on roots which can be
up to 3.3 cm (1 in) in
diameter but are usually
smaller; reduction in plant
vigor; yellowing plants
which wilt in hot weather

15. Powdery mildew
Oidium asteris-punicei
Symptoms
• Powdery white covering on
leaves; patches may
coalesce to cover entire
plant; if plant is heavily
infected leaves may roll
upward and appear
scorched