Chillies physiological disorders By Mr. Allah Dad Khan Provincial Coordinator IPM KPK MINFAL Islamabad

2. Chillies Physiological
Disorders
ToT to FFS Staff
By Mr. Allah Dad Khan
Provincial Coordinator IPM KPK
MINFAL

3. Sunscald
• Sunscald occurs when the pepper fruit
receives too much sun. Wide plant spacing
and defoliation by bacterial spot may result in
sunscald. Breakage of stems by pickers will
also open the plant and result in sunscald.
Promote good foliage growth with proper
fertilization and irrigation during prolonged
periods of hot weather

4. Pepper fruit with small and large areas of sunscald and black
mold growth

5. Pepper fruit with small and large areas of sunscald and
black mold growth

6. Pepper plant that appears to have good foliage for fruit
cover but still has sunscald fruit

7. Pepper plant that appears to have good foliage for fruit cover but
still has sunscald fruit

8. Staked and tied pepper plants, 4-5 plants between
stakes, one string.

9. • NitrogenDeficiency
SymptomsBranches are
short, thin small distorted
leaves colour changes from
light green to yellowish
green fruits small and
chlorotic
• Correction MeasureFoliar
spray of Urea 1% at
fortnightly intervals

10. • PhosphorusDeficiency
SymptomsPlants stunted
leaves small narrow
inwardly curved. Older
leaves yellowish with pink
margin fruits small distorted
in shape.
• Correction MeasureFoliar
spray of DAP 2% at
fortnightly intervals

11. • PotassiumDeficiency
SymptomsGrowth
suppressed leaf number
reduced size small colour
yellowish necrotic lesions
along the veins crinkling
leaves and marginal scorch.
• Correction MeasureFoliar
spray of K2SO4 1% at
fortnightly intervals

12. • CalciumDeficiency SymptomsGrowth of
the plant is reduced symptoms are first
seen at the growing points of the plant,
which may become necrotic and
die. Marginal leaf chlorosis followed by
necrosis will be evident on the youngest
leaves. Pale brown sunken areas will
also develop around the blossom end of
the pepper fruits (blossom – end rot or
BER). Flower buds will fail to
develop. The youngest leaves will
remain small and deformed and will
tend to curl upward at the margins.
• Correction MeasureFoliar spray of
CaSO4 1% or soil application of gypsum
@ 25 kg/ha.

13. • MagnesiumDeficiency
SymptomsSymptoms appear
on older leaves first. These
are characterized by
interveinal chlorosis. As the
deficiency progresses, the
older leaves die. The largest
veins remain green while the
smallest do not.
• Correction MeasureFoliar
spray of MgSO4 1% and Urea
1%

14. • SulphurDeficiency
SymptomsChlorosis occur in
young leaves; leaves
become small
• Correction
MeasureFoliarspray of
CaSO4@0.5 -1.0%

15. • BoronDeficiency
SymptomsNewly emerging
leaves are malformed. Plants
show shunted
growth. Chlorotic streaks
appear perpendicular to the
veins. Incomplete leaf
formation and inhibition of
fruit and flower. Deficiency of
boron may results in reduction
in weight and size of the fruit.
• Correction MeasureFoliar
spray of borax@0.2%

16. • BoronDeficiency
SymptomsNewly emerging
leaves are malformed. Plants
show shunted
growth. Chlorotic streaks
appear perpendicular to the
veins. Incomplete leaf
formation and inhibition of
fruit and flower. Deficiency of
boron may results in reduction
in weight and size of the fruit.
• Correction MeasureFoliar
spray of borax@0.2%

17. • CopperDeficiency
SymptomsPlants show
overall droopy appearance
with shortened intervals
between petiole. Size of
leaves reduced.
• Correction MeasureFoliar
spray of CuSO4@2%

18. • IronDeficiency
SymptomsSymptoms are first
seen in the youngest
leaves. Initially the smallest
veins remain green, which
produces a reticulate pattern
of green veins on yellow
leaves. The leaves eventually
turn completely chlorotic but
there is no associated
necrosis.
• Correction MeasureFoliar
spray of FeSO4 0.5% at
fortnightly intervals.

19. • ManganeseDeficiency
SymptomsMarginal
chlorosis of young leaves,
which later turn
brown. Fruits with raised
spots which are dark brown
on black in colour.
• Correction MeasureFoliar
spray of MnSO4@1-2%

20. • ZincDeficiency
SymptomsLeaves become
small and chlorosis occur in
young leaves
• Correction MeasureFoliar
spray of ZnSO4@0.5%

21. • BoronDeficiency
SymptomsNewly emerging
leaves are malformed. Plants
show shunted
growth. Chlorotic streaks
appear perpendicular to the
veins. Incomplete leaf
formation and inhibition of
fruit and flower. Deficiency of
boron may results in reduction
in weight and size of the fruit.
• Correction MeasureFoliar
spray of borax@0.2%