WHEAT :: MAJOR DISEASES :: LEAF BLIGHT

Leaf blight - Alternaria triticina / Bipolaris sorokiniana
Symptoms
Reddish brown oval spots appear on young seedlings with bright yellow margin. In severe cases, several spots coalesce to cause drying of leaves. It is a complex disease, having association of A.triticina, B.sorokiniana and A. alternate.

Symptoms

Disease cycle
Primary spread is by externally seed-borne and soil borne conidia. Secondary spread by air-borne conidia.
Favourable Conditions

• Temperature of 25˚C and high relative humidity.

Management

• Spray the crop with Mancozeb or Zineb at 2 kg/ha.