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山楂花腐病是我国山楂生产上的一种新病害。病原菌在病僵果内越冬,翌年春季从地表潮湿处的病僵果上产生子囊盘。子囊盘肉质,灰褐色,盘径3～12毫米,盘柄长1～18毫米。子囊棍棒形,无色,子囊间有侧丝。子囊孢子椭园形或卵园形,单胞,无色,子囊孢子大小为7.4～16.1×4.9～7.4微米。分生孢子单胞,柠檬形,串生,孢子串可分枝,分生孢子大小为12.4～21.7×12.4～17.3微米。经观察及接种试验表明,除山楂外,接种的其他树种均不发病。根据形态特征及致病性山楂花腐病菌鉴定为Monilinia johnsonii(E11.etEv.)Honey,在我国尚属首次发现。
Hawthorn flower rot is a new disease on the production of Hawthorn in China. Pathogenic bacteria in winter sickness stiff fruit, the spring of next year from the surface of the damp fruit of the frozen asystole produce ascus plate. Ascoch plate succulent, taupe, diameter 3 ~ 12 mm, handle length 1 ~ 18 mm. Ascular capsule sticks, colorless, between the cysts have lateral silk. Ascospore elliptic or egg-shaped garden, single cell, colorless, ascospore size 7.4 ~ 16.1 × 4.9 ~ 7.4 microns. Conidia cell, lemon-shaped, string students, spore string can be branched, conidia size of 12.4 ~ 21.7 × 12.4 ~ 17.3 microns. The observation and vaccination experiments show that, in addition to hawthorn, vaccination of other species are not sick. According to the morphological characteristics and pathogenic hawkthorn fungi identified as Monilinia johnsonii (E11.etEv.) Honey, is the first time in China.