Mainly known as an agent of anthracnose in fruits, Colletotrichum coccodes is also often observed on the roots of cultivated tomatoes, in soil as well as in soil ( black dot ).

It attacks the root cortex, which becomes dull, brown and gradually decomposes in soil crops (Figures 1 and 2). Above ground, it tends to discolor and decompose. The central cylinder is sometimes invaded; it then locally takes on a black tint. It produces black microsclerotia in the cortex which signifies its presence on the roots (Figures 2 to 4). These are sometimes surmounted by acervuli with brown bristles (Figure 5) and producing cylindrical conidia. It is for this reason that we have detailed it especially in the chapter Other alterations of the roots .

It should also be noted that C. coccodes has an often underestimated pathogenicity. It is also able to attack tomato rootstocks of the KNVF type ...

For additional information on this fungus, you can consult the sheet Colletotrichum coccodes .