The mushroom cultivator. A practical guide to growing mushrooms at home

Paul Stamets. The mushroom cultivator. A practical guide to growing mushrooms at home. - Agarikon press, 1983

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Содержание

FOREWORD by Dr. Andrew Weil

PREFACE

I. INTRODUCTION TO MUSHROOM CULTURE

II. STERILE TECHNIQUE AND AGAR CULTURE

III. GRAIN CULTURE

IV. THE MUSHROOM GROWING ROOM

V. COMPOST PREPARATION

VI. NON-COMPOSTED SUBSTRATES

VII. SPAWNING AND SPAWN RUNNING IN BULK SUBSTRATES

VIII. THE CASING LAYER

IX. STRATEGIES FOR MUSHROOM FORMATION (PINHEAD INITIATION)

X. ENVIRONMENTAL FACTORS: SUSTAINING THE MUSHROOM CROP

XL GROWING PARAMETERS FOR VARIOUS MUSHROOM SPECIES

XII. CULTIVATION PROBLEMS AND THEIR SOLUTIONS: A TROUBLESHOOTING GUIDE

XIII. THE CONTAMINANTS OF MUSHROOM CULTURE: IDENTIFICATION AND CONTROL

XIV. THE PESTS OF MUSHROOM CULTURE

XV. MUSHROOM GENETICS

APPENDICES

GLOSSARY

BIBLIOGRAPHY

INDEX

PHOTOGRAPHY AND ILLUSTRATION CREDITS

ACKNOWLEDGEMENTS

OCR
Strategies for Mushroom Formation/143

Figure 131

Cased grain culture of Agaricus brunnescens showing overlay and stroma.

of carbon dioxide and other metabolic gases from
Fresh air also removes high
the room. Since Agaricus brunnescens does not pin properly at CO2 concentrations above 2000
ppm, lowering the carbon dioxide content of the room's air to under 2000 ppm is critical. The inhibitory effect of carbon dioxide on mushroom formation gives Agaricus growers a high degree of
control over the pinning process. Not until carbon dioxide is removed will pinheads form. If carbon
dioxide levels remain high, the mycelium will totally cover the casing surface, a condition called
overlay.

The mycelial mat formed by overlay makes the casing impervious to water and produces few
pinheads. Overlay also occurs if the casing surface is too dry, the humidity (rH) is too low or the air
temperature remains too high. Overlay can be counteracted by patching, but the cause must be
diagnosed and carefully corrected if the culture is to be revived. Few flushes will be as great from a
casing with overlay as from a casing properly managed.

Stage III: Primordia Formation (Knotting)
Once substrate temperatures have been lowered and CO2 levels have been reduced, primordia

will begin to form. Maintain:
1. A constant fresh air supply to remove metabolic gases, and CO2 at levels less than 1 000
ppm.

2. A constant temperature in the growing room that is within the fruiting range.

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