Observation 48642: Cerrena unicolor (Bull.) Murrill
When: 2010-07-16
No herbarium specimen

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Eyes3
Recognized by sight

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This
By: Noah Siegel (Noah)
2010-11-03 10:10:22 CST (-0500)

was one of Sam’s favorite topics, he would go on and on about it; it really is quite fascinating

Interesting Ecology
By: walt sturgeon (Mycowalt)
2010-11-03 10:00:50 CST (-0500)

From Michael Kuo:
But identifying Cerrena unicolor isn’t nearly as thrilling as discovering the fascinating relationship it has with the horntail wasp (Tremex columba) and the ichneumonid wasp (Megarhyssa spp.). It’s a complicated story, and I admit I have not done exhaustive research, but the broad strokes are as follows:

Cerrena unicolor spores get into the ovipositor of the wood-boring wasp (the horntail) when she drills into hardwood logs (often logs of beech). The spores get carried around with the wasp’s eggs, and wind up germinating when eggs are laid; mycelium grows quickly and serves as the food source for larvae. But since horntail populations would get out of control without a predator on horntail larvae, the ichneumon wasp enters the picture; it is parasitic on horntail larvae. Cerrena unicolor apparently helps the ichneumon wasp find the horntail larvae buried in the wood by emitting a pheromone.

Created: 2010-07-16 18:34:05 CDT (-0400)
Last modified: 2010-07-16 18:41:47 CDT (-0400)
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