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对自广东、福建、云南、黑龙江、江苏和上海6个省市材料中筛选到的14个细菌菌株与小麦赤霉病菌(F.graminearum)的拮抗作用进行了初步研究,结果表明菌株可分为3种类型:1型,细菌对赤霉病菌分生孢子几乎没有抑制作用(分生孢子萌发率仍在90％以上)芽管正常;2型,分生孢子萌发率高于90％,但芽管顶端膨大成球形;3型,分生孢子萌发率低于5％或不萌发。平板拮抗试验表明:1型、2型的拮抗圈较小。边缘不清;3型的拮抗圈大,边缘清晰而光滑。细菌间拮抗试验表明,拮抗菌间存在着相互拮抗现象,且只发生于不同拮抗类型的拮抗细菌间。另外,每一种拮抗细菌拮抗谱宽窄和受到其它细菌拮抗的数量也有很大不同,这为拮抗菌的选择和混配提供了理论依据。
The preliminary studies on the antagonism of 14 bacterial strains isolated from Guangdong, Fujian, Yunnan, Heilongjiang, Jiangsu and Shanghai provinces by F. graminearum showed that the strains could be divided into Three types: type 1, the bacterium had almost no inhibitory effect on the conidia of Fusarium graciarum (the germination rate of conidia was still over 90%); the germ percentage of type 2 and conidia was higher than 90% The top of the tube expanded into a spherical shape; type 3, conidia germination rate of less than 5% or non-germination. Plate antagonistic tests showed that type 1 and type 2 antagonistic circles were smaller. Edge is unclear; type 3 antagonistic ring large, clear and smooth edges. Antagonistic tests showed that antagonistic bacteria existed mutual antagonism, and only occurred in different antagonistic types of antagonistic bacteria. In addition, the quantity of each antagonistic bacteria antagonistic spectrum width and the antagonism by other bacteria is also very different, which provides a theoretical basis for antagonistic bacteria selection and compounding.