Tikka disease of groundnut is a fungal disease. This disease is also called leaf spot disease. Host - Groundnut plants. (Arachis hypogea) Casual organism - Cercospora arachidicola, Cercospora personata. Tikka disease is the major disease of groundnut in India. All the groundnut varieties grown in India are susceptible to the disease. It is a common disease in the United States of America, China, Philippines, Sri Lanka, Malaysia and Australia. This material is for School and Undergraduate Students.

1. Presented by
M.KARTHIGA,
18ZOO13
S.LOGESHWARI,
18ZOO17
PLANT PATHOLOGY
TIKKA DISEASE OF GROUNDNUT
E.M.G. Yadava Women’s College, Madurai-625014
An Autonomous Institution – Affiliated to Madurai Kamaraj University
Re-accredited3rd Cycle with Grade A+ & CGPA 3.51 by NAAC
Dr.V.Vijaya
Assistant Professor of Botany
E.M.G. Yadava Women's College

2. Tikka Disease of Groundnut
Kingdom: Fungi
Phylum: Ascomycota
Class: Dothideomycetidae
Order: Capnodiales
Genus: Cercospora
 Tikka disease of groundnut is a fungal disease. This disease is also called
leaf spot disease.
 Host - Groundnut plants. (Arachis hypogea)
 Casual organism - Cercospora arachidicola, Cercospora personata.
 Tikka disease is the major disease of groundnut in India.
 All the groundnut varieties grown in India are susceptible to the disease.
 It is a common disease in the United States of America, China, Philippines,
Sri Lanka, Malaysia and Australia.

3. Symptoms
 The symptoms of Tikka disease appear in the form of leaf spots when the plants
are one two months old.
 The spots are circular. They appear in a number of the leaves.
 First, the spots appear as small patches on the surface of older leaves, which later
on turn brown. The foliage finally dries up due to excessive spots and later in
defoliation.
 Cercospora personata causes, circular, dark brown or black leaf spots which are 16
mm in diameter.
 The mycelium of Çercospora personata is intercellular, brown, septate and
branched. It produces haustoria to absorb food from the host tissue.
 The spots are found on both the surface of the leaf.
 Due to severe infection 20-30% of yield reduction will happen.
 Leaf spots caused by Cercospora arachidicola are irregular and comparatively
larger in size. Each spot is 4-10 mm in diameter.

4. Symptoms

5.  The mycelium of Cercospora arachidicola is intercellular and intracellular on
the host tissue.
 The mycelium is branched, elongated, septate and brownish in color. It does
not produce haustoria.
 In Cercospora arachidicola, the conidiophores are 24µ long, geniculate and
septate.
 Each conidium is 4-12 septate. The conidia are short cylindrical and 1-7
septate.
 They are yellowish brown color and produced on the upper surface of leaves.
 They emerge out in clusters by rupturing the epidermis.
Symptoms

7. Disease Cycle
 This disease is disseminated by wind from leaf to leaf.
 The conidia remain viable in the soil for a long time.
 A period of at least three days of high humidity, prolonged low temperature and
dew promotes severe infection of the disease.
Control Measures
1. Burning of diseased plant debris reduces the source of inoculum.
2. Two to four year's crop rotation often cuts down the rate of infection.
3. Pruning can also be done with the help of pruning scissors by removing the
infected parts of the plant.
4. The tikka disease can be effectively controlled by spraying the crop with 0.03%
carbendazim, 0.05% Benomyl and Bordeaux mixture.
5. This disease can be controlled by treating the seeds with agrosan GN and
0.5%CuSo, solution.
6. Cultivation of disease resistant varieties like Gwatior 120, and Gwatior 1032.

8. Reference:
1. https://biologyreader.com/tikka-disease-
of-ground-nut.html
2. https://agritech.tnau.ac.in/org_farm/orgfar
m_prac_agri_groundnut_diseases.html
3. Google images

9. Thank You