TOMATO CANKER

PAT401

1. COLLEGE OF AGRICULTURAL TECHNOLOGY ( (Affiliated to Tamil Nadu Agricultural University, Coimbatore-3) kullapuram (Po), ViaVaigai Dam, Theni-625 562 TOMATO BACTERIAL CANKER STUDENT COURSE TEACHER M.MONICA Dr.PARTHASARATHY.S 2015021081 Asst. Prof. (Plant Pathology)

2. Diseases name: Tomato bacterial canker Pathogen name: Clavibacter michiganensis pv . michiganensis

3. Systemic position: Domain: Bacteria Phylum:Actinobacteria Class: Actinobacteria Order: Actinomycetales Family : Microbacteriaceae Genus: Clavibacter Species: Clavibacter michiganensis

4. Importance: It is gram negative, non motile, Non flagellate, Strictly aerobic bacteria. It is discovered in 1910 as the cause of bacteria canker of tomato in North America. Coccoid forms may also be observed They predominantly appear as single cells, but some V, Y and palisade arrangements are usually also present.

5. SYMPTOMS: First symptom is downward curling and wilting of lower leaves. Unilateral wilting ,light coloured stricks on leaves Light brown or yellow vascular discoloration of stem Yellow bacterial ooze Birds eye appearance on fruits.

6. Symptoms: t Infected leaves Infected fruit @ agritech.tnau.ac.in

7. Conditions for disease development: Infection occurs through wounds in plant tissue or leaf stomata or roots. Bacteria can survive in soil and infected plant debris for up to five years. I t can also survives on weeds, volunteer plants and seeds. Secondary spread: Splashing water, contaminated equipments, tools used in pruning, clipping and trasnsplanting operations.

8. Favourable conditions: Temperature: Moderate ( 18-24°C) Relative Humidity: Greater than 80% Optimum moisture conditions for plant growth Low light intensity High nutrients concentration (Specially N) Sandy soil

9. Treatment and control : Disease free seed selection: It is not recommended that tomato Use of Hot water treatment Treatment with 8% acetic acid or 5% hydrocholoric acid. Tomato- crop rotation for 3 years Soil steam sterilization is occurred

10. References : Gupta S.K. Monica Sharma and R.C. Sharma, 2017. Disease of Vegetables , Ornamentals and Spice Crops Scientific publishers, New Delhi.(pg.no:144- 156) http://www.fftc.agenet.diseases Saha L.R. Handbook of Plant Disease, 2002, Kalyani publishers , New Delhi . ( pg.no.98-123)