梨轮纹病又称瘤皮病、粗皮病,分布遍及各梨产区,在南方果梨产区尤其严重,可造成烂果和枝干枯死,特别是部分感病品种在轮纹病流行年份采收时,病果率可达50%以上,贮藏一月后基本损失殆尽。发病原因:引发梨轮纹病的病原在有性阶段为子囊菌亚门真菌贝伦格葡萄座腔菌,无性阶段属半知菌亚门轮纹大茎点菌。扁圆形或椭圆形的分生孢子器拥有黑褐色的炭质器壁,并有乳头状孔口,内壁密生丝状、单胞分生孢子梗,分生孢子梗顶端着生单胞、无色的生 Pear ring disease, also known as oncosis, dysentery disease, distributed throughout the pear-producing areas, particularly in the southern pear fruit producing areas, can cause rotting fruit and stems died, especially in some susceptible varieties in the popular era of rotammen When the disease rate of up to 50% or more, basically lost one month after storage. Cause of the disease: the pathogen causing pear ring disease in the sexual stage for Ascomycotina subordinate fungi Berengulu colon bacilli, asexual stage is a semi-known Amycolacadulina large stem point bacteria. Obround or oval conidia with dark brown carbonaceous wall, and a nipple-shaped orifice, the inner wall dense filamentous, single cell conidiophores, conidiophores top of the cell single cell, no Colored students