Sapota leaf spot

Sapota Leaf Spot
Disease of Sapota
by Harisanadevi. C

1. SAPOTA LEAF SPOT COLLEGE OF AGRICULTURAL TECHNOLOGY (Affiliated to Tamil Nadu Agricultural University, Coimbatore-3) Kullapuram (Po), ViaVaigai Dam, Theni-625 562 STUDENT Miss. HARISANADEVI.C ID. No. 2015021044 COURSE TEACHER Dr. PARTHASARATHY S Asst. Professor (Plant Pathology)

2. CAUSAL ORGANISM – Phaeophleospora indica

3. SYSTEMATIC POSITION Domain: Eukaryota      Kingdom: Fungi         Phylum: Ascomycota             Subphylum: Pezizomycotina                 Class: Dothideomycetes                     Subclass: Dothideomycetidae                         Order: Capnodiales                             Family: Mycosphaerellaceae                                 Genus: Phaeophleospora                                     Species: Phaeophleospora indica  

4. DISTRIBUTION World  India, Thailand, Malaysia, Vietnam, Mexico . India Maharashtra, Tamil Nadu, Karnataka, Gujarat.

5. SYMPTOMS The disease is characterized by numerous, small, pinkish to reddish brown spots with whitish centres in the leaf . Causes premature leaf fall resulting in yield reduction.

6. SYMPTOMS

7. PATHOGEN CHARACTERS Sub epidermal dark walled cup shaped pycnidia which contains brown, verrucose , cylindrical conidiophore with cylindrical, brown smooth walled single to multiple septate conidia.

8. CONIDIA OF Phaeophleospora indica

9. DISEASE CYCLE OF Phaeophleospora indica

10. MODE OF INFECTION Primary Infection: Ascospore Secondary infection: Wind borne conidia

11. FAVOURABLE CONDITIONS High humidity Frequent rains Moist conditions favours the development of disease (October to December)

12. INTEGARATED DISEASE MANAGEMENT Collect and burn the infected plant parts to minimize the spread of the disease . Grow resistant varieties like PKM-3 . Avoid excessive watering and provide proper drainage in the field.

13. Deep summer ploughing. Increase air circulation by proper training and pruning. Spray Mancozeb @ 0.25% or Copper oxychloride 0.2% to control the disease.

14. REFERENCES agropedia.iitk.ac.in/content/major-diseases- sapota -and-their-management https://niphm.gov.in/IPMPackages/Sapota