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Symptoms on tomato  


  • Organs attacked :
Leaves Vessel


  • 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.
  • 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 :
Mayotte Reunion Guyana
Guadeloupe Martinique New Caledonia
Last change : 07/04/22
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5