Major disease in Pomegranate. Caused by Xanthomonas campestris pv. punicae Symptom- V or L shaped cracking on the fruits.

1. BACTERIAL LEAF SPOT OF POMEGRANATE
COLLEGE OF AGRICULTURAL TECHNOLOGY
(Affiliated to Tamil Nadu Agricultural University, Coimbatore-3)
Kullapuram (Po),ViaVaigai Dam, Theni-625 562
STUDENT
Miss. KARTHIGAI DEVI.S
ID. No. 2015021056
COURSE TEACHER
Dr. PARTHASARATHY. S
Asst. Professor (Plant Pathology)

2. HISTORY:
 It was first reported in India from Delhi in 1952.
 Presently, the disease occurs widely and outbreaks
have been recorded in pomegranate growing states
like Maharashtra, Karnataka and Andhra Pradesh.

3. DISTRIBUTION:
 Disease was prevalent only in India.
 But it was also reported from South Africa in 2010.
LOSSES:
 Losses was recorded in Rajasthan in 2009.

4. BACTERIAL LEAF SPOT OF POMEGRANATE
Causal organism:
Xanthomonas campestris pv. punicae
Syn: Xanthomonas axonopodis pv. punicae

5. SYMPTOMS:
Dark coloured irregular necrotic spots 2-5 mm in
diameter.
Premature dropping of leaves.
Raised irregular spots are seen on the fruits.
Fruit cracking occurs in ‘V’ or ‘L’ shape.

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8. PATHOGEN CHARACTERS:
 Xanthomonas is a gram negative bacteria.
 It is rod shaped.
 It is motile having single polar flagella.

9. TAXONOMY:
Domain : Bacteria
Phylum : Proteobacteria
Class : Gammaproteobacteria
Order : Xanthomonadales
Family : Xanthomonadaceae
Genus : Xanthomonas
Species : Xanthomonas campestris pv. punicae

10. MODE OF SPREAD:
 Primary spread is through infected leaves, fruits and
twigs.
 Secondary spread is through rain.
 Entry is through wound and natural openings.
SURVIVAL:
Survives in soil and fallen leaves.

11. FAVOURABLE CONDITIONS:
 High temperature and low humidity favor the disease
development.
 Optimal temperature for the growth of bacterium is
30ºC.

12. INTEGRATED DISEASE MANAGEMENT:
 Remove the affected and fallen leaves.
 Spray mancozeb @ 0.2%
 Spray with streptocycline @ 500 ppm + copper oxy
chloride 2000 ppm

13. Thank You