Causal organism: Pyricularia grisea
Symptoms: Infection occurs from sowing to crop maturity. On leaves,the spots are spindle shaped with brown margin and necrotic grey center. Conidiophores and conidia are formed in the center of the spots. Stem infection causes blackening of the region on either side of node leading to weakening, shrinking and breaking of plant. Ear head infection results in black discoloration either at neck region or at any portion of rachis. This causes either chaffiness or partial filling of grains.
2. Seedling blight / leaf spot:
Causal organism : Helminthosporium nodulosum
Symptoms: The fungus attacks all plant parts. Leaves show small ovalelongated brown spots. The spots merge together to form bigger lesions and turn dark brown. Spots are also noticed on culm, leaf sheath, neck and panicle.
3. Mosaic / Mottle streak
Causal organism : Finger millet mosaic virus / Finger millet mottlestreak virus
Symptoms: Affected leaves exhibit chlorotic streaks. Plants becomes tunted and pale. Earheads are small and grains are ill-filled. Vector:Jassid
Seed treatment: Thiram 4 g or Captan 4 g or Carbendazim 2 g/kg or Pseudomonas fluorescens @10g/kg of seed.
Spray any one of the fungicides Edifenphos 500 ml or Carbendazim500 g or Iprobenphos(IBP) @ 500 ml/ha. First spray immediately after noticing the symptoms. Second and third sprays at flowering stage at 15 days interval to control neck and finger infection.
Foliar spray with Aureofungin sol 100 ppm at 50% ear head emergence followed by a second spray with Mancozeb 1000g/ha or Pseudomonasfluorescens @ 0.2% 10 days later
2.Virus diseases:Mosaic and Mottle streak
Rogue out the affected plants.
Spray any one of the insecticides like Monocrotophos 36 WSC 700ml/ha or Methyl dematon 25EC 500 ml/ha on noticing symptoms andrepeat twice if necessary at 20 days intervals for control of insect vectors