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Presentation blast of rice

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Narayan Awasthi
Narayan Awasthi

This document discusses rice blast, a fungal disease of rice. It provides details on the history, symptoms, causative organism, disease cycle and management of rice blast. Rice blast was first recorded in Japan in 1704 and in India in 1913. It is caused by the fungus Pyricularia oryzae. Symptoms include small, boat-shaped lesions on leaves, stems and neck that can cause blighting or rot. The fungus survives in plant debris and can overwinter in weeds. Management includes using healthy seed, seed treatment, removal of weeds, balanced fertilization and fungicide sprays at tillering and flowering stages. Resistant rice varieties are also recommended.

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Presentation blast of rice
SUBMITTED BY:- NARAIN DHAR [M.Sc.(Ag) 1st yr] 2016-17 SUBMITTED TO:- Dr.D.PRATAP (SIR) Dept- Genetics & Plant Breeding
CONTENT ï‚— INTRODUCTION ï‚— HISTORY OF DISEASE ï‚— DAMAGE CAPACITY OF DISEASE ï‚— SYMPTOMS OF DISEASE ï‚— ETIOLOGY ï‚— DISEASE CYCLE ï‚— DISEASE MANAGEMENT ï‚— IDM APPROCHES
History Rice of Blast ï‚— Disease of rice blast first recorded in 1704,in Japan. ï‚— In India , disease was first recorded from Tanjore district of Tamil Nadu in 1913. ï‚— The causal organism was first detected by Cavara in 1891 from Italy & first leaf blast model was developed and named as BLAST in japan. ï‚— More Effected Varities of rice R-R 36, RASI ï‚— Total Damage of Crops from Disease Generally 15-20% but by S.Y Padmanabhan 75%,
SYMPTOMS  All parts except root infected  Appeared in Nursery small  Boat Shaped water soaked spots of > 0.5 mm long  Corner of spot – dark brown red  Middle – white grey / ash color  Spots enlarge & collapse – leaf blightning  Neck Infection / Neck Rot Phase (most dangerous)  Black grey mycelium on the neck  No grain formation/ partial formation
Presentation blast of rice
Presentation blast of rice
Presentation blast of rice
Presentation blast of rice
Etiology  Causal Organism:- Pyricularia oryzae or pyricularia grisea ( I.S) Perfect stage :- Magnaporthe grisea  Survive in seed & plant residues  Mycelium survive in puwal – 1-2 years  Survive on weeds – Penicum repens, Digitaria marginata  Relative Humidity. – 90%  Temperatue – 20-25°
Systemic Position Kingdom – Mycota/ Fungi Division – Eumycota Sub division – Deuteromycotina Class – Hypomycetes Order – Hypomycetales Family – Dematiaceae Genus – Pyricularia Species - grisea
Reproductive structures -  (1). Conidia – Pear shaped with 2 septa  (2). Chlamydospore  (3). Sclerotium • Toxin -  (1). Pyricularin  (2). ά– Picolinic acid • Enzyme - (1). Pectinolytic enzyme
LIFE CYCLE OF DISEASE
MANAGEMENT OF DISEASE  Use healthy seed  Seed treatment – Tricyclazole or Beam 75 WP - @ 4 gm/ kg seed  Removal of weeds (ROUGING)  Use balance fertilizers – no heavy use of N2  Spray - (i). Beam @ 6 gm/litre or  (ii). Bavistin – 0.1 %  First spray - tillering stage Second spray – flowering stage  (iii). Contaf – 0.2 %  Dis. Res. Var. - IR- 64, Pant Dhan-16, Pant Dhan Sankar - 1
INTEGRATED DISEASE MANAGEMENT
Presentation blast of rice

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Presentation blast of rice

  • 2. SUBMITTED BY:- NARAIN DHAR [M.Sc.(Ag) 1st yr] 2016-17 SUBMITTED TO:- Dr.D.PRATAP (SIR) Dept- Genetics & Plant Breeding
  • 3. CONTENT ï‚— INTRODUCTION ï‚— HISTORY OF DISEASE ï‚— DAMAGE CAPACITY OF DISEASE ï‚— SYMPTOMS OF DISEASE ï‚— ETIOLOGY ï‚— DISEASE CYCLE ï‚— DISEASE MANAGEMENT ï‚— IDM APPROCHES
  • 4. History Rice of Blast ï‚— Disease of rice blast first recorded in 1704,in Japan. ï‚— In India , disease was first recorded from Tanjore district of Tamil Nadu in 1913. ï‚— The causal organism was first detected by Cavara in 1891 from Italy & first leaf blast model was developed and named as BLAST in japan. ï‚— More Effected Varities of rice R-R 36, RASI ï‚— Total Damage of Crops from Disease Generally 15-20% but by S.Y Padmanabhan 75%,
  • 5. SYMPTOMS  All parts except root infected  Appeared in Nursery small  Boat Shaped water soaked spots of > 0.5 mm long  Corner of spot – dark brown red  Middle – white grey / ash color  Spots enlarge & collapse – leaf blightning  Neck Infection / Neck Rot Phase (most dangerous)  Black grey mycelium on the neck  No grain formation/ partial formation
  • 10. Etiology ï‚— Causal Organism:- Pyricularia oryzae or pyricularia grisea ( I.S) Perfect stage :- Magnaporthe grisea  Survive in seed & plant residues  Mycelium survive in puwal – 1-2 years  Survive on weeds – Penicum repens, Digitaria marginata  Relative Humidity. – 90%  Temperatue – 20-25°
  • 11. Systemic Position Kingdom – Mycota/ Fungi Division – Eumycota Sub division – Deuteromycotina Class – Hypomycetes Order – Hypomycetales Family – Dematiaceae Genus – Pyricularia Species - grisea
  • 12. Reproductive structures - ï‚— (1). Conidia – Pear shaped with 2 septa ï‚— (2). Chlamydospore ï‚— (3). Sclerotium • Toxin - ï‚— (1). Pyricularin ï‚— (2). ά– Picolinic acid • Enzyme - (1). Pectinolytic enzyme
  • 13. LIFE CYCLE OF DISEASE
  • 14. MANAGEMENT OF DISEASE  Use healthy seed  Seed treatment – Tricyclazole or Beam 75 WP - @ 4 gm/ kg seed  Removal of weeds (ROUGING)  Use balance fertilizers – no heavy use of N2  Spray - (i). Beam @ 6 gm/litre or  (ii). Bavistin – 0.1 %  First spray - tillering stage Second spray – flowering stage  (iii). Contaf – 0.2 %  Dis. Res. Var. - IR- 64, Pant Dhan-16, Pant Dhan Sankar - 1