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  Groundnut or peanut-Arachis hypogea

Groundnut or peanut-Arachis hypogea:

Tikka disease of groundnut

Pathogen: Disease incited by a fungus Cercospora personata.
Systematic position: The fungus belongs to class Deuteromycetes.

Symptoms:

Lesions take place on the leaves, while the plants are at least two months old. The symptoms come out in July and carry on up to maturity of the plant. The lesions on the leaves are round and 1 to 6 mm in diameter. These spots are dark brown/black in color and found on both of the leaf’s surfaces. Yellow border develops around every such type of leaf spot.

Pathogen:

The mycelium of Cercospora personata is brown in color, septate branched and slender. Branched haustoria are generated to absorb food materials from the host tissue. The conidia are septate and long. Every conidiophore generates only a conidium at its tip. The extends of the disease occurs by means of conidia that are dispersed by wind.

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                                                             Diagram: Tikka disease of groundnut

Control:

The disease can be managed through sanitation and crop rotation. The make use of phosphatic and potassic manures decrease the disease. Sulphur dusting is fairly effective.  Resistant variety should be sown.

 

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