EXTRACT:

6. Adverse environmental effects of glyphosate

6.1 Glyphosate and Fusarium species

Sanogo and co-workers (2000) observed that crop loss in soy due to infestation by Fusarium solani f. sp. glycines increased after glyphosate applications. 

Kremer and co-workers (2005) described a stimulating effect of the root exsudate of GR soy sampled after glyphosate application on the growth of Fusarium sp. strains. Treatments caused concentration dependent increase on the mycelium mass of the fungus. Nonetheless, Powel and Swanton (2008) could not confirm these observations in their field study. 

Kremer and Means (2009) claim that certain fungi utilise glyphosate released from plant roots into the soil as a nutritive, which facilitates their growth. Soil manganese content also affects the above consequence of glyphosate through chelating with the compound and thus, modifying its effects. Considering the fact that numerous plant pathogenic Fusarium species produce mycotoxins, an increasing proportion of these species is far not favourable as a side-effect.András Székács and Béla Darvas - Forty Years with Glyphosate

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http://www.intechopen.com/articles/show/title/forty-years-with-glyphosate