Answer: There are no legal effective or practical chemical control options. Hand-pick the "egg" stage before it ruptures and put it in a zipper bag and discard. That will keep the spores from spreading an new stinkhorns from growing. Small or new colonies may be eradicated through complete removal of an area of mulch to the depth of the native soil. No guarantees with this method. Or alter the environment: Use of non-mulch groundcovers, such as ivy, jasmine, liriope, mondo grass, etc., will reduce stinkhorn incidence in a landscape.
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