The pathogen was Cucurbita cucurbitae, a fungus belonging to the subphylum Fungi. From the seedling stage to the adult stage, the disease can be affected. The leaves and melon vines suffer heavy damage. A round or semi-circular brown or dark brown lesion appeared on the edge of the cotyledon of the seedlings, and the outer periphery often had a yellow-brown halo with long black spots or pale red viscous substances. The base of the stem near the ground turned dark brown, and the shrinkage caused the seedlings to fall. The petiole or melon vine was infected. In the initial stage, a water-soaked yellowish round spot appeared, which was slightly sunken and then turned black. After the lesion surrounded the stem, the whole plant withered. The true leaf is infected with a spot that is initially round to spindle or irregularly immersed in water spots, and sometimes appears in a ring pattern. The lesions are easily broken and perforated when dry, and when wet, the leaves produce a pink viscous material. The lesions of mature fruit mostly occurred on dark green stripes, and did not occur or slightly occurred in the light-colored areas of the striped fruit. The fruit appeared as a water-soaked, brownish-spotted lesion at the beginning of the disease. The depressions often cracked, and the middle of the lesion was when the humidity was high. A pink viscous material was produced, and in severe cases the lesions rot. Immature watermelon infected with water stains light green round lesions, resulting in malformation or shedding of the young melon. Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone Xi'an Healthway Biotech Co.,Ltd , https://www.xianhealthway.com