University of FloridaSolutions for Your Life

PP355: Stem and Fruit Canker of Dragon Fruit in South Florida

Figure 2. Symptoms caused by Neoscytalidium dimidiatum on dragon fruit cladodes. The whitish yellow spots (A) turn orange to brown over time, which can coalesce to form larger spots or lesions. The spots or lesions are sometimes surrounded by yellow halos, which turn into necrotic water-soaked lesions (B). The pathogen then produces black fruiting bodies (pycnidia, arrowed) on the lesions (C), which can initiate new infections on young, healthy cladodes and developing fruits. The dried lesions usually fall off, forming “shot-hole” symptoms (D).

Credit: Cheng-Fang Hong, UF/IFAS