This document summarizes physiological disorders that can occur in various fruits. It discusses issues like malformation, black tip, scorching of leaves, spongy tissue, chlorosis, and deficiencies in mangoes. It also covers disorders in bananas like chlorosis and maladie du parasol. Disorders addressed in other fruits include die back and bronzing in guava, boron deficiency and skin freckles in papaya, fruit necrosis and unfruitfulness in aonla, chilling injury in jackfruit, sunscald and black heart in pineapple, die back and oblongation of fruit in sapota, sun burning in litchi, fruit drop, granulation, fruit cracking, and frenching in
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Useful for ICAR-JRF, SRF, NET, BHU, IBPS-SO, SEMESTER EXAMS and Other Competitive exams related exclusively to Horticulture
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3. •BLACK TIP
Due to cool flumes of brick klins.
Cause due to sulphur dioxide.
Depressed yellowing spot distal end of
fruit
Increase in size of spot and finally
black.
Fruit never reach full maturity.
CONTROL
Application of Borax@.6% before
flowering, during flowering and after
fruit setting.
5. SCORCHING OF LEAVES
• It ressembles pottasium
deficiency but it is due to
chloride.
• Identifies by brick red colour
towards the tip.
• CONTROL-KCl should be
avoided instead of potassium
sulphate.
6. SPONGGY TISSUE
•Convective
heat arising from
the soil is the
main cause.
•Pulp remains
unripe due to
unhydrolysed
starch.
•CONTROL-Sod
culture, green
vegetation
mulching at pre
harvest stage.
7. CHOLOROSIS:
Marginal chlorosis due to N or Zn
deficiency.
Reduction in leaf size,thinning of
petiole.
BLUE DISEASE:
It is due to magnesium deficiency.
Purple blotching of petioles
Necrotic patches on the olderleaves.
•BANANA
9. MALADIE DU PARASOL OF BANANA
Seen in Ivory coast.
Yellowing of leaves and drooping.
Due to Cu deficiency.
10. GUAVA
Die back
Withering of lower most branch of
the tree from top downwards.
Lesions develop at the point of
disease part.
CONTROL
Application of lime or gypsum@1.8Kg
13. •SKIN FRECKLE
Freckle like blemishes
occur in ripe fruit.
Young plant not effected.
Diameter increase of fruit.
CONTROL
Wrapping of fruit in white
paper bag reduce the fruit
freckle.
16. •FRUIT NECROSIS
1. It is due to
boron
deficiency.
2. Mesocarp
tissue become
hard at the
third week of
september.
3. CONTROL-
Spray Borax
@0.6% thrice
in the month of
september and
october.
17. UNFRUITFULLNESS
1.The problem in Banarasi
variety.
2.It is due to absence of
female flower.
CONTROL
1.Plantation of two or more
type of variety.
22. SUNSCALD
• Sometime the peduncle bearing
fruit fall on one side exposing
fruits direct to sunlight.
• The cells under skin of exposed
surface get damage.
• CONTROL
• Fruit should be covered with
banana leaf during april/may.
23. FASCIATION & MULTIPLE CROWN
•In some cases
pineapple bear more
than 1 crown.
•The top of fruit flat
and unfit for canning.
•Fruit tastes insipid in
nature.
•It is a heritable
character in Cayene
group.
•Flowering take more
timethan the normal
plant.
•CONTROL
•Avoid ratooning of
crop.
24. BLACK HEART
• It is also called internal
browning.
• Initially brown spots develop in
fruit let base to the core in
several case entire core of fruit
effect brown coloration.
• Low temp. and exogenous
application of GA induce this
disorder.
27. DIE BACK
It is common where sapota cultivation is
being extend to traditionally rice growing
regions.
Due to anaerobic condition in monsoon
and post monsoon wilt is common
appearance aggravated by Fussarium spp.
CONTROL
Effective drainage facility.
28. OBLONGATION OF FRUIT
Shape of fruit related with number
of seeds in it which depend on
condition for pollination at anthesis.
High temperature rise at rainfall at
flowering cause oblongation fruit.
CONTROL
Extreme summer avoided.
29. CORKINESS OF SAPOTA
The fruit expose to intense
sunlight do not ripen uniformly
developing corking during winter.
This is probably due to killing
hydrollysing enzyme by alteration
moisture accumulation and heating
of fruit surface by winter.
31. SUN BURNING
•Serious problem in
litchi grower which are
promoted to high to
high temperature.
•Low humidity, Low
soil moisture,and Ca &
B deficiency.
•CONTROL
•Irrigation at weekly
interval.
•Application of
Borax@8% and
ZnSO4@1.5%supply
at weekly interval
starting from pea
stage to harvesting &
spraying NAA 20ppm.
33. FRUIT DROP•Higher
temperature, excess
of nutrient.
Immediately after
fruit set at marble
stage which lasts
for a month after fill
bloom refered as
post set drop.
•CONTROL
•Application of 2,4-
D-10ppm combined
with aureofungin at
the 1st week of
fruit drop.
34. GRANULATION
•Especially seen in
north India.
•Abnormality initiated
at the stem end of the
fruit , which extends
to styllar end.
•Fruit become grey in
colour,taste insipid and
less juice extract.
•CONTROL
•Spraying of GA
15ppm followed by
NAA 300ppm in
October.
35. FRUIT CRACKING
•Uneven regular
supply of water.
•Lack of well
proper irrigation
management.
•Less availability
of nitrogenous
fertilizer.
•CONTROL
•Well irrigation
management.
38. STONNING OF FRUIT
•Main season is
due too much
water after a long
spell without
water.
•The cells in the
meat of the fruit
rapidly swell due
to an influx of
water apposed to
regular watering.
•CONTROL
•Regular water
supply.
39. THANK YOU TO ALL
SOURAV PANIGRAHY
16B/10
IPSIT SAMPAD DASH
47B/10