Quote:
Originally Posted by Donwill[_2_]
Never underestimate WD40.
I once had a large fairy ring in the front garden, about 12' across. I
sprayed the heads with WD40, and then again after about a week.
In the autumn they made a reappearance, and got the same treatment.
The following spring the survivors got another dose, and that was it.
They disappeared never to return.
It was a*lot* easier than digging up the soil, getting rid of it, and
refilling the hole and replanting.
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It seems unlikely that spraying the toadstools did anything to the underlying fungus which lives in the soil, unless of course it was dripping off and getting into the soil. How many years since you last saw some toadstools? Can you still see the ring mark in the grass? Unless it has been a number of years since you last saw toadstools, it may still be there. They don't fruit every year.
Also, you talk about it fruiting in both autumn and spring. I rather suspect that these were not the same fungus.