Symptoms of anthracnosis on eggplant

• Organs attacked :

• Symptoms :
  • Small irregular chlorotic lesions rapidly becoming necrotic on leaves. A rather marked yellow halo surrounds them (figures 1 to 5). Anthracnose does not appear to have a strong impact on eggplant foliage.
  • Elongated, brownish lesions on stems
  • Damp circular spots spreading, browning and blackening gradually on the fruits as they ripen (Figures 6 and 7). The spots are slightly concave and can coalesce, causing rotting of important areas of the fruit (figure 7), or even degrading them entirely. Alteration of the seeds which take on a rusty hue.

• Signs : presence on the lesions of flat and superficial conceptacles, microsclerotia and acervuli, sometimes distributed in concentric circles (figure 8). The acervuli producing very numerous spores in mucilaginous masses of pinkish couleyr to salmon. In many species of Colletotrichum black bristles (or setae) are observed within these structures.

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• Affected production areas :

•  Colletotrichum spp. reported on eggplant : C. gloeosporioides f. sp. melongenae, C. acute, C. truncatum