Sigatoka Symptoms on Cucurbitaceae

• Organs attacked :

• Symptoms :
  • Small moist lesions appearing on the old leaves or on the youngest depending on the Cucurbitaceae (figures 1 to 5).
  • Thereafter, the spots expand, and are rather circular with a brownish center. Their periphery is reddish brown to black, and they are surrounded by a clearly visible yellow halo.
  • Their size is often rather limited, not exceeding more than one centimeter in diameter, for example on watermelon.
  • The center of the spots may lighten and the degraded tissues fall off, giving the leaves a riddled appearance.
  • Severely affected leaves turn yellow and become senescent. Leaf fall is sometimes observed.
  • Round to elongated, concave and necrotic lesions on fruit (Figure 6).

• Signs : fruiting bodies of the fungus dot the lesions, sometimes giving them a slightly dark gray to black color (figure 7).
• Possible confusion : rare
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• Affected production areas :

• Cercospora sp. reported on Cucurbitaceae :