UAHS SHIVAMOGGA

1. : DISEASES OF HORTICULTURAL CROPS AND
MANAGEMENT
PAT 302(2+1)
DISEASES OF POMOGRANATE AND THEIR
MANAGEMENT
:
MANOJ N S
BA1TAEO42 1MANOJ N S

2. DISEASE CASUAL ORGANISM
BACTERIAL BLIGHT Xanthomanas axonopodis pv .punicae
ANTHRACNOSE Colletotrichum gleosporides
WILT COMPLEX Ceratosystis fimbriyata ,fusarium
oxysporum ,meloidogyne incognita and
xyleborus fornicatus
LEAF SPOTS / FRUIT SPOT Alternaria alternata , cercospora punicae
FRUIT ROTS Phytopthora nicotiane ,aspergillus spps

3. Bacterial Blight : Xanthomas
Axonopodis Pv , Punicae
First described by
Hingorani and
Mehta (1952,delhi)
Severe in
KA,TN,HP,&MH
Loss up to 50-
80%

5. SYMPTOM
 Appearance of dark coloured irregular water
soaked lesins/oily spots on leaves
 Spots measures 2-5mm in D
 Then the leaves
distorted,malformed&premature defoliation
 Raised spots are seen on fruits which are
irregular
 Then dark spots appeared on twigs and nodes
causes nodal blight
 Cracking of infected fruits-star,X,Y,T shaped
cracking

6.  Temp-25-30°C
 RH-35-80%
 Free water on surface to initiate disease
 PSI-Infected planting material&plant debris
 SSI-Wind & rain splash
 Cantaminating tools & pollinating insect

7.  Use disease free planting materia
 Remove & Burnt the affected plant parts
 Provide proper spacing-4.5*3.0 m
 First year bearing flower shouid be removed
 One crop per year is good,either Hasta
bahar(september-october)or Ambe(january-
february)

8.  Before pruning spray 1% bordex mixer to reduce
leaf infection
 Pruning knief,secature should be disinfected after
every cutting in Sodium hypochlorid for @25ml/lit
solution
 After pruning paste the stem with streptocyclin
0.5g/l+red oxide/red soil 200gm

9. Anthracnose- Collectotricum
gleosporiodes
Symptom
 Initially water soaked lesions on leaves ,flowers
and fruits
 Later turn to sunken ,brown, necrotic depressed
spots
 Development of black corky appearance which
indicate Acervulus
 Finally complete rotting of fruits

11. DISEASE CYCLE
 PSI-Infected plant debris
 SSI-Air borne conidia
Favourable Condition
 Tem;25-30C
 RH-90%
Management
 Field sanitation
 Spray 0.1%carbendazim or 0.1% propiconazole

12.  Cercospora fimbriata
 Fusarium oxysporum
 Root knot nematode; Meloidogyne incognita
 Shot hole borer; Xyleborus fornicatus
Importance
 Severe in KA&MH
 First reported in1978 Nasik Dist MH
 In karnataka 1988 in Bagalkot
 Now it is severe by 1993 spreds all garden

13. Yellowing of leaves& twigs,wilting of whole
plant
Longitudinal splitting of stem
Grayish discoloration of vascular tissues
Bluish patches can be seen on bark
Galls on secondary & tertiary roots
(nematode infection)
Pin holes on external&internal surface(Shot
hole borer)

15.  Survive in soil,infected planting material,infected
stalks
 More severe in black soil&ill drained soil
 Spreds by irrigation,runoff water,agriculture
impliments &root cantact

16. Provide proper spacing-4.5*3.0m
Maintain proper drainage,Drip irrigation is
good
Sandy loamy soils are good for planting
Use of healthy planting materials
Infected plant shouid be drenched with
Carbendazim 50WP(2g/l) or
Propiconozole25EC(2ml/l)
Application of Phorate 20g/tree

17. Symptom
Small reddish brown ,circular spots appear on
the fruits
As the disease advances these spots coalese
to form larger patches
Then fruits starts Rotting
The arils affected which become unfit for
consumption

19. Disease Cycle
PSI-Plant debris, leaves ,fruits
SSI-Air born conidia
Management
All affected fruit should be collected &destroyed
Spraying of Dithane M-45(0.25%)

20. Symptoms
Round black spots on fruits&petiole
Disease starts from calyx end gradualy the
entire fruit shows black spots
Then fruits further rots emitting foul odour

22. DISEASE CYCLE
 PSI-Infected plant debris& fruits
 SSI-Wind& Rain splash
Management
 Field sanitation
 Controled by spraying of Bavistin(0.2%) or Dithen
M-45(0.25%) 0r Dithen Z-78(0.25%) @an interval of
10-15 days from the onset of flowering