Symptoms of stemphyliosis on tomato

• Organs attacked :

• Symptoms :
  • Tiny brownish spots a few millimeters in diameter, slightly angular (figures 1 to 3, 5 and 6), sometimes discreetly surrounded by a chlorotic border (figure 4). Generally, they lighten gradually and eventually take on a grayish hue as they become necrotic and dry out. Damaged tissues, dull in appearance, sometimes split (figure 7).
  • Lesions extending and confluent in humid conditions to occupy large portions of the lamina, even leading to leaf mortality.
  • More or less substantial leaf fall.
  • Rare brown lesions, rather limited and longitudinal on petioles, even on stem.

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• Signs : fruiting bodies visible with a binocular magnifying glass on both sides of the blade: brown masses corresponding to ripening conidia carried by conidiophores.
• Possible confusion : rare

• Production areas affected :