Growth Parameters

Spawn Run:

Incubation Temperature: 70-80° F. (21-27° C.) Relative Humidity: 95-100% Duration: 35-70 days (strain dependent) C02:> 10,000 ppm Fresh Air Exchanges: 0-1 Light Requirements: 50-100 lux. Primordia Formation:

Initiation Temperature: 50-60° F. (10-16° C)* 60-70° F. (16-21° C)** Relative Humidity: 95-100% Duration: 5-7 days C02:< 1000 ppm

Fresh Air Exchanges: 4-7 per hour

Light Requirements: 500-2000 lux at 370-420 nm.

Fruitbody Development:

Relative Humidity: 60-80%

Duration: 5-8 days

C02:< 1000 ppm

Fresh Air Exchanges: 4-8 per hour

Light Requirements: 500-2000 lux at 370-420 nm.***

Cropping Cycle:

Every 2-3 weeks for 8-12(16) weeks.

sought to show the profitability of Shiitake log culture. Gormanson & Baughman (1987) published an extensive study and concluded that profitability of growing Shiitake outdoors, as in Japan, was marginal at best. Roberts (1988) reviewed their statistical models and concluded that Shiitake cultivation on logs was not profitable. In the most recent study on log Shiitake industry in the United States, Rathke & Baughman (1993) concluded that when a production threshold of 4000 logs/year was achieved by an experienced grower, the net profit on money invested, after costs, was a mere 5.76% return after-tax equivalent. Increasing production to 8000 logs had no appreciable increase in profit

* Cold weather strains.

** Warm weather strains. Fluctuations of temperatures within these ranges is beneficial to the development of the mushroom crop.

*** Light levels below 500 lux cause noticeable elongation of the stem with many strains.

Figure 244. Ate each flush, the blocks sit dormr.n for 7-10 days, ate which they are p'ac i ito a soaking tank and submerged in water for 24-36 hours

ïg, ; 15. After submersion, the blocks are spaced w 1 apart and placed onto open-vir shelves. These same blocks on solid shelves would contaminate with green molds.

Figure 244. Ate each flush, the blocks sit dormr.n for 7-10 days, ate which they are p'ac i ito a soaking tank and submerged in water for 24-36 hours

ïg, ; 15. After submersion, the blocks are spaced w 1 apart and placed onto open-vir shelves. These same blocks on solid shelves would contaminate with green molds.

ahilitv Joe Deden who runs Forest Resource Center outside of Lanesboro Mil sot a has been in-

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