## The Project Gutenberg eBook of A study of mushrooms and mushroom spawn

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Title: A study of mushrooms and mushroom spawn

Author: Edward Henry Jacob

Release date: November 11, 2023 [eBook #72093]

Language: English

Original publication: West Chester: E. H. Jacob, 1914

Credits: Carol Brown, Charlene Taylor and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive/American Libraries.)

*** START OF THE PROJECT GUTENBERG EBOOK A STUDY OF MUSHROOMS AND MUSHROOM SPAWN ***

1

A STUDY OF

# MUSHROOMS
AND
MUSHROOM SPAWN

BY

## EDW. H. JACOB

West Chester, Pa.

Copyrighted 1914, by E. H. Jacob

2

## PREFACE

This pamphlet has been written by one who has had a large and successful experience in growing Mushrooms for the markets. It was his misfortune to meet failure after failure at first, due principally to poor Spawn, unfavorable conditions of the beds and other reasons. He is, therefore, unusually well qualified to guide those who desire to grow Mushrooms for home and local use.

It is my desire to give concise, accurate and most reliable information without making any misleading or extravagant statements, and to write in such a way as to be easily understood and successfully followed.

EDWARD H. JACOB

3

### THE SOURCE OF SUCCESS

It is acknowledged by all successful mushroom growers that the first and most important thing to be considered is the spawn. No matter how favorable conditions may be, no matter what care is taken in making the beds, selecting the location or composting the manure, if the spawn is not good, mushrooms will not be plentiful and in many cases no mushrooms at all will make appearance.

The writer of this pamphlet spent nine years in carefully studying out the spawn question, and during that period spent thousands and thousands of dollars in experimental work. All of the different makes of spawn obtainable were tested, both French, English and American, with varying results. Sometimes he obtained a reasonable yield of mushrooms and frequently none at all.

The result of all these experiments brought the conclusion that the only reliable method of producing spawn is by a grafting process discovered by Dr. B. M. Duggar while he was connected with the United States Department of Agriculture at Washington, D. C.

This method of making spawn is directly responsible for the liberal supply of fresh mushrooms on the market in season. If we had to depend on foreign spawn, as in the past, mushrooms would still be scarce and high.

The grower would rather pick a pound of mushrooms to each square foot of bed surface at an average price of 25 cents a pound than to pick one-half pound (more often less) at 50 cents a pound, which was the rule years ago.

4

### MUSHROOMS GROWN FOR HOME USE

It is a very easy matter to plant a bed of mushrooms in the cellar or in an outbuilding, for home use, by following instructions and using good spawn. In this case the results are reasonably certain. It is a very great satisfaction to have this luxury during the entire winter season at the very lowest cost.

Growing mushrooms on a large scale becomes more complicated, and would require the continuous attention of a competent and interested person.

### HOW MANY MUSHROOMS ARE GROWN IN THE UNITED STATES

Conditions vary from year to year, and no accurate estimate is available as to how many pounds of mushrooms are grown in the United States. We manufactured and sold enough spawn last season to grow 2,000,000 pounds of mushrooms, the output of the year having increased by 100,000 bricks over the previous year.

This does not mean that new growers have come into the field, but, rather, the discarding of poor or unreliable spawn by old growers has been general.

It would therefore be reasonable to conclude that from four to five million pounds of fresh mushrooms (aside from field-grown) are now used annually in the United States.

### COST OF GROWING A POUND OF MUSHROOMS

The actual cost of growing mushrooms varies according to the yield per square foot of bed surface. If one pound is picked to every square foot, the cost is much lower than when only one-half pound to the square foot is picked.

Growers who are obliged to purchase manure at a distance, pay the freight on it and employ competent men to handle and care for the mushroom-growing plants, estimate the cost of producing mushrooms at 15 to 25 cents per pound.

Those who grow mushrooms for pleasure, and have their own stables, or get manure from a neighboring stable, are at very little expense and could grow mushrooms at less than half the above cost.

5

The above photograph shows a bed of Mushrooms grown from the Brandywine Spawn. This is no better than may be expected when local conditions are right. The entire house in which this photograph was taken averaged more than one and a half pounds of Mushrooms to every square foot of bed surface. They were grown by Edward H. Jacob, West Chester, Pa.

66

### MARKET PRICES

Users of mushrooms generally pay at the store from 40 to 60 cents a pound for mushrooms, and when these can be delivered from the grower to the user, these prices are not overestimated.

If mushrooms are to be grown for the larger markets like New York, Philadelphia, Boston, Pittsburgh or other Eastern cities, the net prices realized by the Eastern grower will be much less. In fact, the markets occasionally are badly overstocked, and mushrooms sell below the actual cost of production. It would therefore seem to be most profitable when mushrooms can be delivered to the user by the grower.

In a majority of smaller towns and cities mushrooms are rather scarce, and local dealers are glad to take them at compensating prices. Meat is high in price and likely to be still higher. Mushrooms can often be used as a most delicious substitute.

### HOW TO COOK AND SERVE MUSHROOMS

We have prepared a separate sheet giving the best and most practical ways of cooking mushrooms. This will be forwarded to anyone making application for it and enclosing a two-cent stamp.

### OUR METHOD OF TESTING ORIGINAL CULTURES

Before our Brandywine Spawn is made up in quantity, the different varieties are first tested in our own beds and accurate record of production is each day carefully made.

In this way we eliminate entirely unproductive varieties and choose only those which are most vigorous, perfect in shape and color and will make the greatest yield.

7

Spawn Plant located at West Chester, Pa. Since the above photograph was taken this plant has been doubled in size. It is located within half a block of the main freight depot, where ten acres, or two city blocks, had been purchased for the manufacture of The Brandywine Spawn.

8

### PRICE LIST

The fact that Jacob’s Brandywine Spawn costs a little more than any other spawn made, and that the large and most successful growers are quite willing to pay more for it, means that they find it the most profitable to use.

### The BEST is always the CHEAPEST

Jacob’s Brandywine Spawn is made in three varieties, pure white, cream white and light brown at the following prices:

One brick is enough for 10 square feet of bed surface.

1 | brick or more (by mail, prepaid), 35 cents a brick.
5 | bricks or more (by express, not prepaid), 25 cents a brick.
25 | bricks or more (by exp. or frt., not prep’d), 20 cts. a brick.
50 | bricks or more (by exp. or frt., not prep’d), 18 cts. a brick.
135 | bricks (one case) (by exp. or frt., not prepaid), 15 cents a brick.

Stamps, money orders or checks should accompany orders to insure prompt shipment.

Manufactured Solely by
EDWARD H. JACOB

WEST CHESTER, PA.,

U. S. A.

9

On the following pages will be found full and complete instructions for those who wish to grow Mushrooms for home use as well as for the market.

### SELECTION OF A PLACE TO GROW MUSHROOMS

Any cellar which maintains a uniform temperature of from 45 to 65 degrees may be used.

Any barn or outbuilding may be supplied with heat and used successfully, but the temperature should be kept as nearly uniform as possible.

Any cold building which it is not practical to heat, may be planted during September while the weather is still warm and the beds allowed to get cold and even freeze up solid during winter months. Such beds will produce the finest kind of mushrooms during the early spring months when the temperature rises sufficiently.

The larger growers usually build houses especially for mushrooms and heat by means of hot water pipes. Some use abandoned caves or mines, while florists often grow mushrooms successfully under greenhouse benches.

10

### PREPARATION OF MANURE

Select fresh horse manure where wheat or oats straw has been used as bedding.

Never use old manure or manure mixed with shavings or sawdust.

Place the fresh manure in a neat pile and cover with two or three inches of earth.

In the course of three or four days turn the manure over, shaking and mixing the earth in thoroughly. Add water if necessary to keep the manure in reasonably moist condition.

Cover again with earth which will be sufficient, and allow the pile to heat, through the action of bacteria in the manure, for five or six days. Then turn again, shaking up thoroughly each time, and turning the outer dried or whitened portion of the pile toward the centre. Add water with a sprinkler when necessary to keep plenty of moisture. After about four turnings in this way, covering a period of three or four weeks the manure will be sufficiently rotted and decomposed to make into the beds.

### MAKING THE BEDS

The manure should be placed on the floor or prepared bed spaces to a depth of 8 to 10 inches in winter weather. In warm weather 6 or 7 inches are enough.

The compost should be compressed in making the bed and provided it is not too wet it may be tramped, which prevents too much drying out, while the manure is heating in the beds.

The only practical test of the proper moisture content of the manure at time of making beds, is when upon compression in the hand water cannot readily be squeezed out of it.

After the beds are made up they should be covered and allowed to heat for a week or ten days. After this length of time the temperature should be watched until it falls to 70 degrees, when the beds may safely be spawned. The temperature may be obtained by inserting a common glass thermometer in the manure.

During the process of heating, after the beds are made up, the temperature often rises as high as 125 degrees, and it is never safe to spawn until it falls to 70 degrees.

11

The above illustration shows how an ordinary cellar may be fitted up either with beds on the floor or arranged in tiers, one above the other, in order to increase the growing surface.

12

### SPAWNING

The bricks of spawn should be broken into ten or twelve pieces and placed on the surface of the beds 8 to 10 inches apart each way. Then go over the bed again, raising the manure and burying the spawn about half-inch below the surface and tamping (pressing) firmly over each piece, leaving the bed level on top.

In about two weeks dig up a piece or two of spawn carefully, and if the mycelium is noticed running out like a mould from the brick into the manure it is time to case.

This is done by putting one inch of sifted soil evenly over the top of the manure.

### VENTILATION

Where mushrooms are grown on a large scale, proper ventilation is very necessary. The overhead ventilators are generally preferred, as the ventilation is more uniform without draught.

The ventilators should remain open when outside temperature is right, and at other times for one or two hours each day.

Where small beds are used in cellars or out-buildings, extra ventilation is not so necessary.

Avoid all draughts.

### WATERING

While the room should be kept moist, little or no water should be used on the beds after spawning till the mushrooms begin to appear, which is generally from six to eight weeks from time of spawning.

Then the beds at first should be sprinkled lightly every day or two till the surface is quite moist, after that one or two sprinklings a week will be sufficient, according to the condition of the beds. If they get dry quickly water oftener.

13

Mushroom Growing Plant No. 2, built and operated by Edward H. Jacob, West Chester, Pa. This plant contains eleven separate Mushroom houses, with a total growing surface of 78,500 square feet; each building is 100 feet long.

14

### PICKING

The mushrooms should be picked once a day just before they open out. (See cut.)

The root should be twisted gently and taken out with the mushroom disturbing the earth as little as possible.

The stems should be cut off and the mushrooms packed in baskets.

When grown in small quantities, the 1-pound ventilated boxes are often used as a matter of convenience, but the large growers ship generally in four-pound baskets. (See cut.)

Ripe Enough to Pick

The One-Pound Ventilated Boxes

The beds may be expected to produce under ordinary conditions for a period of from two to four months, depending largely upon the temperature. At an average of 50 degrees they will yield at least four months and every other day would be quite often enough to pick.

At 65 degrees they must be picked regularly every day and the crop will be almost completed in two months.

Cooler temperature makes heavier and better mushrooms.

15

### Points to Remember

Mushrooms cannot be successfully grown at a temperature above 65 degrees. A temperature of 70 degrees for 24 hours will kill all growing mushrooms, but more will come up from the same beds when the temperature falls.

Violent fluctuations in temperature are undesirable.

Cold will retard growth, but will not otherwise injure the beds. Freezing will destroy mushrooms already above the ground, but will not hurt the spawn in the beds.

There is probably more injury done by overwatering than by any other one thing.

Keep the surface moist but never soak the beds.

Never cover the bed with earth until it has been spawned 10 days or two weeks, or the temperature of the manure may rise sufficiently to injure the spawn.

Never purchase spawn because it is cheap, neither be led into paying extravagant prices through misleading advertisements.

If any insect pest makes appearance or any diseased condition arises, write the United States Department of Agriculture at Washington, D. C., for information.

Spawn should be as fresh as it is possible to obtain it, should be kept in a cool dry place till used. Improper storage will damage it in a comparatively short time.

Imported brands of spawn are apt to be old and often worthless.

16

THE FOUR-POUND SHIPPING BASKET

*** END OF THE PROJECT GUTENBERG EBOOK A STUDY OF MUSHROOMS AND MUSHROOM SPAWN ***
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