If there is any water logging in the field arrange for drainage.
Get rid of all weeds
Stop nitrogen fertilization or organic manuring until the disease is controlled.
Apply a top dressing of potash to enhance immunity.
Profilactically use inoculants of the following
These are not very effective for curative purpose.
Organic certifiable control measures
Use any of the following
Copper sulphate lime mixture
Effective chemical control agents include
To be applied in recommended doses.
Use Mineral oil + soap emulsion or Neem oil based insecticides
Ues yellow sticky traps
Apply dichlorovos, imidacloprid or synthetic pyrethroids
Thrips are tiny, slender insects with fringed wings. They feed by puncturing the epidermal (outer) layer of host tissue and sucking out the cell contents, which results in stippling, discolored flecking, or silvering of the leaf surface. Thrips feeding is usually accompanied by black varnishlike flecks of frass (excrement)
Picture (click on picture to magnify)