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.
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.
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)
