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  • Author or Editor: Cathy M. Sabota x
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To determine if biological efficiency of shiitake mushrooms was affected by the density of spawn inoculation, white oak logs about 31 inches (0.79 m) long were cut from trees harvested 14 Apr. and inoculated 6 May 2003 with strain WR46 of Lentinula edodes using four rates of inoculation. The number of holes drilled and inoculated with spawn was determined by multiplying the weight of each log by 0.5, 1, 2, or 3. A 15-pound log (6.8 kg) inoculated at “3” times the weight would have 45 holes drilled and inoculated. Each rate of inoculation treatment was replicated three times with three subsamples per replication. After six harvests over a 21-month period, the biological efficiency (BE) of the logs increased by 1.94% per additional hole per pound (0.45 kg). This increase in BE would result in $1.15 in additional returns per log with a cost of only $0.15 more per log due to increased spawn use, resulting in a net profit, excluding increased labor and wax costs, of $1.00 per log.

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