We studied the effects of Fusarium oxysporum f.sp. strigae (Fos), a soil-borne biocontrol agent (BCA) against Striga hermonthica, on total fungal and arbuscular mycorrhizal fungal (AMF) taxa in rhizospheres of maize in both clayey and sandy soil. Effects of Fos-BCA ‘Foxy-2’ were evaluated against (1) S. hermonthica presence, and (2) organic fertilization with Tithonia diversifolia residues at 14, 28 and 42 d after ‘Foxy-2’ inoculation, via DNA-based quantitative PCR and TRFLP fingerprinting. In both soils, ‘Foxy-2’ occasionally promoted total fungal abundance, while the community composition was mainly altered by T. diversifolia and S. hermonthica. Notably, ‘Foxy-2’ stimulated AMF Gigaspora margarita abundance, while G. margarita was suppressed by S. hermonthica. Total fungal and AMF abundance were promoted by T. diversifolia residues. In conclusion, ‘Foxy-2’ resulted in no adverse effects on indigenous rhizosphere fungal communities substantiating its environmental safety as BCA against S. hermonthica.

我们研究了尖孢镰刀菌f.sp.的影响。strigae（Fos），一种针对Striga hermonthica的土壤传播生物防治剂（BCA），在黏土和沙质土壤中，对玉米根际中的真菌和丛枝菌根真菌（AMF）类群都有影响。分别针对（1）评估的Fos-BCA '的Foxy-2'的影响S. hermonthica存在，和（2）有机受精肿柄菊在14，28个残基和42 d后'的Foxy-2'接种，通过基于DNA定量PCR和TRFLP指纹图谱。在这两种土壤中，“ Foxy-2”偶尔都会促进真菌的总丰度，而群落组成主要是由T. diversifolia和S.hermonthica改变的。。值得注意的是，“ Foxy-2”刺激了AMF玛格丽塔玛格丽塔酒的丰度，而玛格丽特酒被S. hermonthica抑制。总的真菌和AMF丰度由T. diversifolia残留物促进。总之，“ Foxy-2”对本地根际真菌群落没有不利影响，证实了其作为针对链球菌S.montherica的BCA的环境安全性。