Tikka disease of ground

It explains in detail about the tikka disease of groundnut

1. WELCOME

2. KAMLA NEHRU INSITITUTE OF PHYSICAL AND SOCIAL SCIENCES [PLANT PATHOLOGY] TOPIC- Tikka Disease of Groundnut By.Shraddha Maurya SEMINAR

3. Tikka disease of groundnut

4. CONTENTS . Introduction . Causal Organism . Symptoms . Disease Cycle . Favourable Condition . Disease Management . Conclusion

5. Introduction * Groundnut is the most important oilseed crop of I ndia. * The total area under Groundnut is about 8 million hectares. * Tikka disease is the major disease of G roundnut in I ndia. * It occurs in every state in I ndia and in every ground of nutgrowing countries of the world. * In U.P,the disease is locally known as chitwa or haldai .

6. Causal organism * The causal organism for the tikka disease of ground nut are Cercospora personata and Cercospora arachidicola . * This disease is also called L eaf spot of Ground nut bacause it causes leaf spots on the leaves.

7. Symptoms

8. Early leaf spot symptoms * Sub-circular dark brown spots are produced on the upper leaflet surface. * The spots are of lighter shade of brown on the lower side of the leaflets. * Yellow halo is seen around the brown spots.

9. Disease Cycle

10. Favourable condition * Relative humidity is the most important factor for infection. * A period of three day of high humidity is essential for maximum infection. * prolonged low temperature and dew also favour severe infection. * Optimum temp., i.e., 20-26⁰c .

11. Disease management * Using of disease resistant varieties. * Changing the crop frequently * Plant disease debris should be burnt to avoid soil borne inoculum . * F ield sanitation. * foliage spray with B ordeaux mixture(4:4:50), D ithane M-45(0.2%), Benlate and Bavistin (0.1%) gives good results.

12. Conclusion * T ikka disease is a commom disease in ground nut caused by Cercospora arachidicola and Cercospora personata . * In the diseased condition,many circulars spots appear on the surface of the leaf. * The conidia of the fungus present in soil or those present in the fruit shell is the source of infection. * Use of fungicides controls the disease.