Obtaining and Planting Your Trees - Growing Organic Orchard Fruits - page 356

Endomycorrhizae are the most useful for fruit trees and many other crop
species. These species of fungi penetrate into the root cells of the host plants.
Mycorrhizal products sold for fruit growers and other organic producers typ-
ically include one or more of the following endomycorrhizae ( Glomus species
are the most common endomycorrhizae found in commercial products):
▪ Gigaspora margarita
▪ Glomus aggregatum
▪ Glomus clarum
▪ Glomus deserticola
▪ Glomus intraradices
▪ Glomus monosporum
▪ Glomus mosseae
▪ Paraglomus brasilianum
Ectomycorrhizal fungi live on the outside surfaces of host plant roots. While
ectomycorrhizae have a much smaller range of plant hosts than endomycor-
rhizae and are not generally considered beneficial for fruit trees, they may
be included in blends with the endomycorrhizae species listed above. Ecto-
mycorrhizal species found in commercial mycorrhizal blends include:
▪ Pisolithus tinctorius
▪ Rhizopogon amylopogon
▪ Rhizopogon fulvigleba
▪ Rhizopogon luteolus
▪ Rhizopogon villosullus