Root colonization by arbuscular mycorrhizal fungi is reduced in tomato plants sprayed with fungicides

Arbuscular mycorrhizal fungi (AMF) form symbioses with many agricultural crops and can improve plant biomass health. The performance of the AM symbiosis is context dependent, for example, usually inoculation AMF Rhizophagus irregularis benefits biomass, but be suppressed by high soil fertility levels. Nevertheless, importance other management practices on AMF, such as fungicides application, poorly understood. Also, pesticide regulations neglect a comprehensive safety testing lawmakers require empirical support to laws. objective this study was evaluate effects spraying tomato plants subsequent root colonization grown in natural containing inoculated R. . We detected that increased total control did not receive Signum ® Topas reduced colonization. effect specific fungal structures variable according product. occurrence arbuscules, while hyphae colonized roots. Cuprozin reduce vesicles. Sampling time also relevant. Effects were at 90 days, 35 days. Our results show should evaluated their non-sterilized soils adequate sampling time.