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

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

4. Aphanomyces root rot (Common root rot)
Aphanomyces euteiches
Symptoms
• Leaves turning yellow
starting from bottom of
plant and moving upwards;
pod production reduced;
soft dark lesions on roots;
plants may be severely
stunted
• Cause
• Fungus

5. Ascochyta disease Mycosphaerella pinodes Phoma medicaginis
Ascochyta pisi
Symptoms
• Tan or purple lesions on
leaves, stems and pods
which may expand and
produce a concentric ring
pattern; blossoms or pods
may drop or become
distorted if lesions girdle
sepals
• Cause
• Fungi

6. Fusarium root rot Fusarium solani
Symptoms
• Stunted plant growth;
yellowing, necrotic basal
leaves; brown-red or black
streaks on roots that
coalesce as they mature;
lesions may spread above
the soil line
• Cause
• Fungus

7. Gray mold (Botrytis mold) Botrytis cinerea
Symptoms
• Fuzzy gray elongated lesions
whoch girdle stem causing wilting
of upper parts of plant; lower
leaves may be covered in fuzzy
gray growth which causes them
to dry out and shrivel; small, oval,
water-soaked lesions on pods
which are tan in color; pod
lesions spread irregularly and
become gray and sunken; young
pods may shrivel and become
covered in fuzzy, gray mycelial
growth
• Cause
• Fungus

8. Downy mildew Peronospora viciae
Symptoms
• Yellow-brown blotches on
upper surface of leaves;
angular patches of fluffy
white-gray fungus on lower
side of leaves; plant growth
may be stunted or distorted
and whole plant may die
before flowering; plant may
produce
• Cause
• Fungus

9. Powdery mildew Erysiphe pisi
Symptoms
• Yellow spots on upper
surface of leaves; powdery
gray-white areas which
coalesce to cover entire
plant; if plant is heavily
infected it may appear light
blue or gray in color
• Cause
• Fungus

10. Rhizoctonia seedling blight Rhizoctonia solani
• Symptoms
• Water-soaked sunken, red-
brown lesions on hypocotyls
(germinating shoot below
seed leaves) and epicotyls
(shoot above seed leaves);
death of growing tip as it
emerges from soil; new shoots
may emerge from a node at
seed but may also be killed
• Cause
• Fungus

11. Septoria blotch Septoria pisi
Symptoms
• Irregular yellow lesions on
leaves and pods with no
definitive margin that
coalesce to form large
yellow patches; large
patches may dry out and
become covered in black
fungal fruiting bodies
• Cause
• Fungus

12. Septoria

13. Septoria

14. Enation mosaic Pea enation mosaic virus (PEMV)
Symptoms
• Blister-like outgrowths
(enations) on underside of
leaves and on pods; leaves
with translucent areas;
severely deformed plants
• Cause
• Virus

15. Mosaic Red clover vein mosaic virus (RCVMV)
Symptoms
• Mottled patterns on leaves;
yellow leaf veins; distorted
leaves; stunted plants which
often die
• Cause
• Virus

16. Streak Pea streak virus (PSV)
• Symptoms
• Purple or brown necrotic
streaks on stems and petioles;
small brown necrotic lesions
on leaves; brown, sunken
lesions on pods; pods fail to fill
properly or do not fill at all;
pods discolored; dieback of
growing tips; chlorosis of
leaves
• Cause
• Virus

17. Bacterial blight Pseudomonas syrngae
Symptoms
• Small, water-soaked spots on
leaves steam and pods which
coalesce and turn brown and
necrotic; lesions on leaves are
angular and develop
translucent centers; lesions on
stem may enlarge and girdle
stem, killing plant parts above;
lesions on pods may cause
seeds to be covered in slime
• Cause
• Bacterium

18. Brown spot Psuedomonas syringae
Symptoms
• Water-soaked spots on leaves,
stems and pods identical to
those caused by bacterial
blight; after several days
lesions turn tan, lose their
water-soaked appearance and
resemble a scorch or burn;
stem lesions are sunken and
elongated and spread
upwards; symptomatic leaves
dry and drop from plant
• Cause
• Bacterium

19. 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
• Cause
• Nematode