Pineapple heart rot - Symptoms, Favorable conditions, Losses and Management

1. HEART ROT OF PINEAPPLE
COLLEGE OF AGRICULTURAL TECHNOLOGY
(Affiliated to Tamil Nadu Agricultural University, Coimbatore-3)
Kullapuram (Po),ViaVaigai Dam, Theni-625 562
STUDENT
Miss. KAVYA.A
ID. No. 2015021060
COURSE TEACHER
Dr. PARTHASARATHY. S
Asst. Professor (Plant Pathology)

2. HEAREEEERAAGVED
Causal organism:
Phytophthora parasitica/
Phytophthora cinnamomi

3. SYMPTOMS:
 Complete rotting of the central portion of the stem.
 Fruit development is arrested and spongy texture.
 The top leaves turn brown and basal portion of leaves
show sign of rotting with foul odour.
 All stages are attacked, but 3-4 months old crown are
more susceptible.

4. ©shutterstock.com

5. ©agriportal

6. PATHOGEN CHARACTERS:
 Mycelium is coenocytic, aseptate, hyaline and
profusely branched.
 Lives in soil and in plant tissues, can take different
shapes and can move in water.

7. TAXONOMY:
Kingdom : Chromista
Phylum : Heterokontophyta
Class : Oomycetes
Order : Peronosporales
Family :Peronosporaceae
Genus : Phytophthora
Species : Phytophthora parasitica

8. ©researchgate.com

9. MODE OF SPREAD:
 Primary spread is through chlamydospores and
oospores.
 Secondary spread is through air and water splash
SURVIVAL:
Soil and in plant tissues.

10. FAVOURABLE CONDITIONS:
 Severe in cool, wet and alkaline soils.
 Optimal temperature for the growth of is 25ºC.

11. INTEGRATED DISEASE MANAGEMENT:
 Maintain good soil drainage .
 Soil should not be allowed to enter the hearts during
planting.
 Remove diseased plants and burnt.
 Application of Bordeaux Mixture- 1%

12. REFERENCES:
www.apsnet.org
www.agropedia.com