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Agricultural crops :: Oilseeds :: Sunflower

Leaf crinkle disease

Symptom
  • The symptoms of this disease always develops first as yellow blotch, but later leaf crinkling symptoms dominate.
  • The electron microscopic studies of the group of symptoms of this disease revealed the presence of spherical particles measuring 26.8+0.15 mm in diameter.

Management

  • Like in any other virus diseases of crop plants, there are no direct methods of controlling the viruses of sunflower.
  • Since the sunflower mosaic is transmitted both by mechanical means and also by aphid vectors in a non-persistant manner, it is very difficult to protect the plants from infection of the virus through this type of vectors.
  • However, the following methods helps much in reducing the incidence and further spread of the virus diseases in the field and thereby reducing the yield losses, have been suggested.
  • Following clean cultivation by removing the weeds both inside and neighboring plots which helps to destroy the virus source and avoid the primary inoculum to the crop.
  • Prophylactic sprays with suitable insecticides to control the insect vectors which come from outside the field and also harbouring inside the field, helps to avoid the primary sources and also further spread in the field.
  • Careful destruction of the infected plants as soon as they are noticed in the field will also help to avoid further spread of the viruses in the field by destroying the source of inoculum within the field.



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