Symptoms on Cucurbitaceae  

• Organs attacked  :

• Symptoms :
  • Symptoms present on both young seedlings and adult plants.
  • More or less rapid withering of young leaves  at the hottest times of the day, reversible initially during the night; they appear suddenly and become permanent (figures 1 to 3). The leaves eventually dry out like whole plants eventually.
  • In less favorable conditions: slowed plant growth, leaf epinasty, yellowing of lower leaves, etc.
  • Yellowish to brown more or less dark coloring of the vessels observable in the roots, the taproot and the stem (figure 4).
  • Absence of symptoms on fruits.

• >>> More pictures  

• 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.

• Possible confusion : with other vascular diseases such as Fusarium.

• Production areas affected :