Symptoms on tomato  

• Organs attacked :

• Symptoms :
  • Symptoms present on both young seedlings and adult plants.
  • Rapid wilting of young leaves at the hottest times of the day, often reversible at first during the night; they come on suddenly and become permanent (Figures 1-2. Leaflets and leaves eventually dry out like whole plants at term.
  • In less favorable conditions: slowed growth of plants, leaf epinasty, emission of adventitious root outlines on the stem, yellowing of lower leaves, etc.
  • Yellowish to brown more or less dark coloring of the vessels observable in the roots, taproot and stem (figures 3 and 4). The marrow and cortex may show moist, brown lesions.
  • Absence of symptoms on fruits.

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• Signs : perform a "water glass test" to reveal the presence of bacteria in the vessels. To do this, take a stem fragment from the lower levels of the stem, immerse it in a glass of water: white mucous wisps made up of billions of bacteria appear within 5 minutes (figure 5).

• Possible confusion :

• Production areas affected :