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Fungicide Effects on Ectomycorrhizae

No Effect	Inhibitory Effect
Aliette (Fosotyl Al)	Banrot
Benomyl (Benlate, Tersan-1991)	Chlorothalonil (Daconil-2787, Bravo)
Captan (Orthocide)	Mancozeb (Dithane)
Carbamate (Fermate, Ferbam)	PCNB (Terraclor, Tri-PCNB)
Carbendazim	Triadimefon (Bayleton)
Dexon	Zineb (Ziram, Zerlate)
Difolatan (Sulfonimide, Difosan, Captafol)
Fuberidizole
Metalaxyl (Subdue, Ridomil)
Thiophanate Methyl (Cleary 3336)
Thiram (Arasan)

There are many different trade names for the same fungicidal chemical.

No fungicide eradicates (i.e., no development) mycorrhizae, they only decrease development for a short time after fungicide application (depending on persistence).

Most foliar sprays of any fungicide, except those that are systemic like bayleton. Do not affect mycorrhizae because the fungicide doesn't come in contact with the mycorrhizae in soil.

There are no reports of any insecticide or herbicide, applied at label rates, affecting mycorrhizal development.

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