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01
Nov

Grain Discolouration

Grain Discolouration:

Symptoms:  

  • The discoloured grains are found associated with fungi like Helminthosporium sp., Curvularia lunata, Saracladium oryzae, Alternaria tenuis, Fusarium moniliforme, Cephalosporium sp. and Phoma sp.  
  • The disease appears on the grains during the maturity stage when there is incessan
01
Nov

Rice Tungro Virus: RTV

Rice Tungro Virus: RTV

Causal Organism: The virus is transmitted by the Green leaf hopper N. virescens and N. niggropictus.

Symptoms:

  • The diseased plants exibit orange yellow discolouration of leaves from the tip downwards.  
  • The young leaves show mosaic mottling. The plants are dwarfed with po
01
Nov

Sheath Rot

Sheath Rot

Casual Organism: Saracladium Oryzae

Symptoms:

  • The Diseases affects at booting stage.  
  • The uppermost leaf sheath enclosing the young panicle shows oblong or irregular spots with grey centre and brown margin.
  • The boot leaf becomes brownish black and rotten.
  • The grains
01
Nov

Sheath Blight

Sheath Blight

Casual Organism: Rhizoctonia Solani

Symptoms:  

  • The disease affects at tillering stage.
  • The infection starts in the form elliptical or oval greenish grey spots appearing on the leaf sheaths near the water level.  
  • These enlarge as irregular, elongated spo
01
Nov

Brown Spot

Brown Spot

Casual Organism: Helminthosporium Oryzae

Symptoms:  

  • The leaves show oval shaped foliar spots with yellow halo.Severely affected field presents a reddish appearance.
  • Grain become discoloured.

Control:

  • Grow resistant varieties like IR-24, Bala, Kris
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