I subscribe to a newsletter from Integrity Soils started by Nicole Masters (Director and researcher) and this months edition had an excellent article by Michael Cashmore entitled "Do your weeds love fungi". View the whole article here. (don't worry it is not that long)
I had to share some of it here, this is the second paragraph; "Weeds get a lot of bad press, surely, they’re just there to annoy us, create work we don’t want and keep companies in business. No, the purpose of a weed is to respond to soil signals and apply remedial action on behalf of nature. They’re not a sign of lack of herbicide, the same as a headache is not a sign of lack of aspirin. Weeds are evidence of repair taking place." I love this article it completely confirms what I share in workshops about why we have weeds and this in turn brings more appreciation and respect for them. There are a few more paragraphs explaining the difference between fungal and bacterial soils and which plants like which microorganisms.
Further on it says "...So for Doug these weeds are his friend and employee. They’re ensuring continuation of the plant/fungal relationship. When re-planting reduce herbicide rates by one third to half and buffer with fulvic acid to reduce damage to your new fungal friends/"
"And please think diversity, think beyond the monoculture that Pinus Radiata has become.
Other fungal indicating weeds: Blackberry (Rubus spp), wild rose (Rosa spp), Poison Oak (Toxicodendron diversilobum), hemlock (Conium maculatum), Foxglove (Digitalis), Hollyhock (Alcea rosea), Hawkweed (Hieracium), Bloodroot (Sanguinaria canadensis), wormwood (Artemisia absinthium), mullein (Verbascum spp) Pictured above in flower, St. Johnswort (Hypericum perforatum), houndstongue (Cynoglossum officinal), Matagouri (Discaria toumatou), bracken (Pteridium spp), gorse (Ulex), broom (Cytisus scoparius), rabbitbrush (Chrysothamnus spp), sagebrush (Artemisia spp), willow (Salix spp), sweet briar (Rosa spp), Leafy spurge, African Boxthorn (Lycium ferocissimum) or mesquite (Prosopis spp)."
View the whole article here. (don't worry it is not that long)