Growing gourmet and medical mushrooms

Paul Stamets. Growing gourmet and medical mushrooms. - Ten Speed Press, 2000


1. Mushrooms, Civilization and History

2. The Role of Mushrooms in Nature

3.Selecting a Candidate for Cultivation

4. Natural Culture: Creating Mycological Landscapes

5. The Stametsian Model: Permaculture with a Mycological Twist

6. Materials fo rFormulating a Fruiting Substrate

7. Biological Efficiency: An Expression of Yield

8. Home-made vs. Commercial Spawn

9. The Mushroom Life Cycle

10. The Six Vectors of Contamination

11. Mind and Methods for Mushroom Culture

12. Culturing Mushroom Mycelium on Agar Media

13. The Stock Culture Library: A Genetic Bank of Mushroom Strains

14. Evaluating a Mushroom Strain

15. Generating Grain Spawn

16. Creating Sawdust Spawn

17. Growing Gourmet Mushrooms on Enriched Sawdust

18. Cultivating Gourmet Mushrooms on Agricultural Waste Products

19. Cropping Containers

20. Casing: A Topsoil Promoting Mushroom Formation

21. Growth Parameters for Gourmet and Medicinal Mushroom Species

Spawn Run: Colonizing the Substrate

Primordia Formation: The Initiation Strategy

Fruitbody (Mushroom) Development

The Gilled Mushrooms

The Polypore Mushrooms of the Genera Ganoderma, Grifola and Polyporus

The Lion’s Mane of the Genus Hericium

The Wood Ears of the Genus Auricularia

The Morels: Land-Fish Mushrooms of the Genus Morchella

The Morel Life Cycle

22. Maximizing the Substrate’s Potential through Species Sequencing

23. Harvesting, Storing, and Packaging the Crop for Market

24. Mushroom Recipes: Enjoying the Fruits of Your Labors

25. Cultivation problems & Their Solutions: A Troubleshoting guide


I. Description of Environment for a Mushroom Farm

II. Designing and Building A Spawn Laboratory

III. The Growing Room: An Environment for Mushroom Formation & Development

IV. Resource Directory

V. Analyses of Basic Materials Used in Substrate Preparation

VI. Data Conversion Tables




In essence, another exponent of expansion of the
mycelial mass has been introduced to the benefit
of overall production.

In contrast, grain spawn is preferred over
sawdust spawn for the cultivation of Oyster

mushroom on cereal straws. Grain spawn
boosts the nutritional base of straw, radically
improving yields compared to using an equal
mass of sawdust spawn.Although sawdust may
have more points of inoculation, yields are sub-

stantially less than if the straw had been
impregnated with grain spawn. Two exceptions
are Hypsizygus ulmarius and H. tessulalus, both
of which benefit when sawdust spawn is used to
inoculate wheat straw.
In Chapter 21, the growth parameters of each

species and the recommended courses for

Figure 124. (Jyster mushrooms
out" of a
jar filled with grain spawn an event with potentially
disastrous consequences for the laboratory.

matching spawn and substrate for maximizing
yields and minimizing problems are described
in detail.

nized with mushroom mycelium. In general,

Spawn Storage

the cultivator should assume that a minor population of contaminants will survive

of time before a decline in viability occurs.

"sterilization" especially as the mass of each
batch increases. Thermotolerant contaminants

Those who buy spawn from afar are especially
at risk. As spawn ages, and with the depletion

are activated when temperatures within the substrate spiral upwards.To thwart this tragedy, the

of food resources, the mycelium's rate of

bags containing nitrogenous supplements

Spawn can be stored for only a short period

growth declines. Metabolic wastes accumulate.
With the loss of vitality, the mycelium's anti-

should be spaced well apart when placed on
open wire rack shelving. The laboratory manager should carefully monitor air temperature

disease defensive mechanisms fail. Opportu-

to off-set the upwardly spiralling trend of internal temperatures.
This arena of problems is largely avoided by
using sawdust spawn for inoculation into supple-

spawn on Day 60 (from the date of inoculation)
can be half as viable at Day 30.
Generally, spawn should be used at peak vi-

nistic molds, bacteria, viruses, and other micro-

scopic organisms proliferate. Good quality

mented sawdust substrates rather than grain

tality. If it can not, only one option remains:
refrigeration. Spawn can be refrigerated for

spawn.Thermogenesis is reduced to a more manageable level. Colonization is faster, more even,
and one gets more "mycelial mileage" from grain
spawn by generating intermediate sawdust spawn.

several weeks at 35-40° F. (1. 6-4.4° C.), effectively slowing its rate of decline, provided the
refrigeration process does not, in itself, cause
contamination to flourish. Spawn must not be

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