First Report of Ceratocystis changhui Causing Postharvest Fruit Rot of Peach in Kunming, China

Plant Disease
Xue LiQiong Huang

Abstract

The peach (Prunus persica (L) Batsch) is a predominant commercially grown stone fruit in China (Lee et al. 1990). Ceratocystis changhui is an aggressive pathogen causing typical black rot symptoms on corms of taro (Colocasia esculenta) (Liu et al. 2018), it has not been reported on other hosts. During the summer and autumn of 2013, a postharvest fruit rot disease was observed on several peaches at a farmer's market (N 25°02'; E 102°42') in Kunming City, Yunnan Province, China. The incidence of the disease varied from 5 to 20%. Necrotic spots were first observed on the infected peach fruit (Prunus persica cv. shuimitao). The spots enlarged gradually and developed into a brown, water-soaked and rotted lesion. Eventually, the whole fruit became soft, rotted and covered with a gray-brown mycelium (Fig. 1 A, B). The isolates were obtained from the symptomatic tissues incubated on slices of fresh carrot root (Moller et al. 1968). After 5 to 10 days of incubation, perithecia and mycelium were observed growing on carrot slices. Spore masses were removed from the apices of perithecia, transferred to potato dextrose agar medium (PDA) and incubated at 25°C for 5 to 10 days, followed by single-spore isolation. All eight single-spore isolat...Continue Reading

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