Topic : Major Diseases of Rice Crop

 Topic : Major Diseases of Rice Crop 
  • 1. Brown Spot
  • Causal Organism : Helminthosporium oryzae  { Asked in JRF Agronomy 2017 & BHU General Agriculture}
  • (Syn: Drechslera oryzaeBipolaris oryzae
  • Symptoms
          • The fungus attacks the crop from seedling to milky stage in main field.
  • Favourable Condition
  • Temperature of 25-30˚C with relative humidity above 80 per cent are highly favourable. [Source: https://www.agricoachingdelhi.in/]
    .


    2. Blast 
    - 
        • Causal Organism: Pyricularia oryzae (Syn: P. grisea  { Asked in IBPS AFO 2014} 
      • [Source: https://www.agricoachingdelhi.in/]
    • (Sexual stage: Magnaporthe grisea) { Asked in JRF Plant science 2017}
  • Symptoms
  • The fungus attacks the crop at all stages of crop growth. 
    • Symptoms appear on leaves, nodes, rachis, and glumes.[Source: https://www.agricoachingdelhi.in/]