Which of the following symptoms is typically seen in strawberries infected with anthracnose?

The presence of petiole lesions is a notable symptom associated with strawberries infected by anthracnose, a fungal disease caused primarily by the pathogen Colletotrichum fragariae. Anthracnose infection typically manifests in the petioles as lesions that can vary in color, ranging from dark brown to black. These lesions may lead to wilting and eventual death of the affected leaves, as the disease impairs the plant’s ability to transport nutrients and water effectively.

In contrast, other symptoms like grey mold are more commonly linked to Botrytis cinerea, causing a different disease. Crown rot generally refers to issues associated with pathogens like Phytophthora spp. Lastly, leaf curl is often symptomatic of viral infections rather than fungal diseases like anthracnose. Thus, the identification of petiole lesions as a symptom provides clear evidence of anthracnose in strawberries.