(接上期)6.大豆茎枯病大豆茎枯病在各豆区均有发生,我国在东北、华北等地相对多发。茎枯病主要危害大豆茎部,影响大豆产量。发病原因:大豆茎枯病是由半知菌亚门真菌大豆茎点霉引起的,其分生孢子器散生或聚生于表皮下,球形或近球形,器壁膜质,褐色,孔口周围的细胞暗褐色。分生孢子球形或椭圆形,无色,单胞,两端钝圆,内含2个油球。另外在2006年,黑龙江省发现由大豆拟茎点种腐病菌(图1)引起的大豆茎枯病。 (Continued) 6. Soybean stem blight Soybean stem blight occurred in all bean areas, China in the northeast, North China and other places are relatively multiple. Stem blight mainly endanger soybean stem, affecting soybean yield. Cause of the disease: Soybean stem blight is caused by the penicillium Stenotrophus subacute fungus Soybean Point, its conidia scattered or polygamy in the epidermis, spherical or subglobular, wall membranous, brown, orifice The surrounding cells are dark brown. Conidia spherical or oval, colorless, single cells, blunt ends, containing two oil balls. In addition, in 2006, Heilongjiang Province found soybean stem blight caused by the pathogen of soybean pseudo-stem point (Figure 1).