Asparagus, its culture for home use and for market Part 8

_Eastern methods._--The pioneers in this industry on Long Island, N. Y., have been the Messrs. Hudson & Sons, who have extensive plants at Matt.i.tuck and Riverhead, each of them as complete as mechanical skill and enterprise can make them. Each plant consists of a storehouse, 50 x 150 feet; a packing-house, 40 x 125 feet; and a can manufactory, 25 x 60 feet. A steam-engine of ten horse-power is required for hoisting, pumping, and for generating gas for the soldering-heaters, and a boiler of one hundred horse-power to generate steam for sterilizing the asparagus. A perspective view of one of the plants is seen in Fig. 36.

[Ill.u.s.tration: FIG. 36--PERSPECTIVE VIEW OF A LONG ISLAND ASPARAGUS CANNERY]

The asparagus, as it comes from the growers, is in bunches seven and one-half inches long and weighing two and one-half pounds each. These bunches are put under a cutter and cut to six and five-eighths inches; they are then untied and put in a tank four feet wide by eight feet long and two feet deep, in which they are washed as carefully as it is possible to do it. It is then hoisted up to what is called the blanching tank, which contains forty gallons. In this it is kept at a scalding heat for one-half hour, when it is ready for the cans. These are filled by women who soon become very dextrous, which is always the case when the pay is in proportion to the amount of work done. Each can contains just one and one-half pounds. Exact weight is imperative, as are details in all manufacturing establishments. Great care is exercised in packing, so that there are no bruised or broken heads, and that on opening the can the stalks may appear as well as if cut fresh from the garden. After the asparagus is in the cans they are filled with a weak brine, which not only expels the air, but adds materially to the flavor of the asparagus.

The cans are then taken to the soldering-bench for sealing up. There systematic labor is noticeable, as every detail of canning must be carried on systematically to make it profitable. The soldering-irons used are hollow and the exact size of the caps, which fit perfectly the grooves made for them. A single turn of the iron finishes the work.

Before the caps are put in their places a small hole is made in each to allow the gas, which is generated by the heat from the soldering, to escape. Without this precaution it would be impossible to hermetically seal the cans. A single drop of solder closes the small opening, and the cans are ready for the retorts for sterilizing.

[Ill.u.s.tration: FIG. 37--STERILIZING TANK]

Here two methods are employed--dry steam, which is the quicker method, and boiling in a closed tank. Most of the first-cla.s.s stock is sterilized in the latter. This tank (Fig. 37) is in three sections, in all twenty feet long, each section holding five hundred cans. The cans are put in iron cribs and are pushed in and taken out with steam elevators. As soon as the cans are lowered the sections are closed tightly and the steam is turned on. The first process of sterilization lasts twenty minutes, when the tank is opened, the cans taken out, and a vent given each. This permits the acc.u.mulated gas to escape, which, if allowed to remain, would materially injure the quality of the asparagus, both in flavor and preservation. For this work a small p.r.i.c.k punch is used, which makes a hole not larger than a pin's head. This vent is almost immediately closed with a single drop of solder and the cans are again returned to the tanks, where the same operation of cooking is repeated. Another twenty minutes completes the work, when the cans are removed to the packing-room, where they are labeled, wrapped, and packed ready for shipment. The cans or boxes are seven inches long, four wide, and two and one-half deep. A view of the sterilizing-room is presented in Fig. 38.

[Ill.u.s.tration: FIG. 38--VIEW OF STERILIZING-ROOM]

The culls, which are put up as tips, are small-sized and crooked heads which, although of equal value as a vegetable, are not shipped to market, as they would detract from the value of the first quality, and are considered by both farmers and canners as by-products. These are cut to three and one-half inches in length, and then go through the same process in canning as the first quality, except that dry steam only is used in sterilization. After going through the blanching process the tips are put in round cans, four inches in diameter and five inches high. After soldering up these cans they are put in the retorts, which are three feet square, each containing five hundred cans, and treated with steam two hundred and fifty pounds to the inch. The cans remain in these retorts half an hour. Then they are taken out, vented, put back again, and remain under the same pressure another half hour, when the work is completed.

By rigid economy even in the most minute detail, and by the skill required in the knowledge of canning, asparagus can now be had at a reasonable price at all seasons of the year, which is a boon to both producer and consumer. At $14.00 per one hundred bunches for No. 1 and $7.00 per hundred bunches for No. 2, or culls, asparagus is one of the most profitable of agricultural crops, and even at one-half these prices it is a much better paying crop than potatoes at 50 cents per bushel.

[Ill.u.s.tration: FIG. 39--INTERIOR VIEW OF A CALIFORNIA ASPARAGUS CANNERY]

_Pacific Coast methods._--Canning and preserving of asparagus in California is carried on on as grand a scale as are most other undertakings. An idea of the extent and importance of this comparatively new industry may readily be conceived when it is considered that one establishment alone, The Hickmott Asparagus Canning Co., on Bouldin Island, in the San Joaquin River, has recently shipped an entire train-load of canned asparagus from San Francisco to New York. This train consisted of fifteen freight-cars containing 600 cases each, making a total of 9,000 cases, averaging forty-eight pounds each, thus making an actual weight of 432,000 pounds. By far the larger portion of the yearly asparagus crop in California is canned or preserved in gla.s.s, and in that shape sent to the East, exported to England and the continent of Europe, and, in fact, to every civilized country of the world. For canneries where nothing but the white product is put up the shoots are cut the instant they show their tips above the surface. The canneries are located as near the fields as possible, the effort being to get the product in gla.s.s or cans before it becomes in any way withered, the important point being that asparagus is never allowed to become dried.

[Ill.u.s.tration: FIG. 40--PERSPECTIVE VIEW OF CANNING PLANTS AT BOULDIN ISLAND]

The method employed at Bouldin Island, where a crop of 1,500 acres is canned annually, is to have troughs containing running water in shady places in the fields. The asparagus, as fast as cut, is brought to these troughs, and is thoroughly washed. These troughs are just wide enough to take in the shoots of the proper length for canning, and each piece is trimmed before being immersed. From the troughs the asparagus is taken to the sorting table, then on to the scalding vats until it reaches the fillers, where is completed the systematic handling of this product, packing it to perfection, nothing remaining except to be labeled, when it is ready to be forwarded to the markets of the world. The entire process from the time the stalks are taken from the ground to the time they are ready for the table consumes less than six hours. The process throughout is a marvel of cleanliness, particular attention and stress being laid on every detail connected with it. No bleaching agents or anything foreign or deleterious whatever is used in the packing of this plant. In Fig. 39 is seen the interior of one of these canneries, where the especially constructed solderless cans of the company are being packed. Everything connected with the growing, harvesting, and canning is done on Bouldin Island, save only the printing of the labels.

That the operators may be lodged in comfort the company has erected modern cottages for their employes who have families, besides well-equipped boarding-houses. The development and growth of this asparagus cannery is one of the marvels of California. Starting ten years ago with a rented boiler, under the arched dome of the sky for a roof, and nothing but the shade of weeping willows for a storehouse, as seen in the Frontispiece, it has developed into a superb plant, equipped with all modern appliances. During the active season 1,500 hands are employed directly and indirectly by the canning company, and the estimated output for the average season is 150,000 cases. Figs. 40 and 41 present perspective views of some of the asparagus canneries on Bouldin Island.

DRYING

Although the drying of asparagus is not much practiced in America, it is well worth the attention of those who at times have a surplus of fresh stalks. Dried asparagus is especially recommended for soups and sauces, and if properly prepared it is no less desirable as a table vegetable.

Dried asparagus keeps indefinitely, and cost of transportation is largely reduced. For the latter purpose medium-sized spears are most suitable, as they dry more evenly than larger ones. Some recommend the peeling or scalding of the stalks before drying, but this is not essential, and, if desired, may be done after steaming. On a large scale the drying may be done in any modern evaporator.

[Ill.u.s.tration: FIG. 41--CANNERY IN ASPARAGUS FIELDS]

For home use the most satisfactory way is to string the stalks with a large needle and strong thread through the b.u.t.t ends of the stalks, and hang them along buildings or fences where they are exposed to the full rays of the sun. To insure a uniform drying it is important that all the spears on the string are of the same thickness, as the thicker ones require more time to dry than those of smaller size. When the air is dry and warm one day's exposure to the sun will be sufficient to dry them.

Otherwise the strings will have to be hung up in the kitchen in the evening, or in some other dry place over night, to be brought out again the following morning, until the asparagus is perfectly dry. It is then ready to be put in boxes or loose bags and stored in a dry place. If the stalks have been peeled before drying, when desired for use they are placed in cold water for half an hour, some salt is added, and they are cooked like fresh asparagus.

For preparing dried asparagus that has not been peeled before drying, Dr. Brinckmeier recommends taking a sufficient number of the dried stalks and place them in water, which, while not boiling, is very near the boiling point, and keeping them there until they resume their succulent, smooth, fresh appearance. To keep the water just right a double boiler is best, with the stalks in the inner one. The water in the outer vessel should be kept at a steady boil. As the stalks resume the fresh appearance, take them out carefully one by one and place in cold water until cooled, after which place on a dish to dry. They should be carefully scalded to remove the hard outside skin, done up in a bundle, either by tying with strings or wrapping in a piece of netting, placed in boiling water, to which a little salt has been added, and allowed to remain there a few moments--a very few, for it cooks quickly--until done.

These methods are recommended for white asparagus only, and when properly dried and cooked asparagus so treated is by many considered to be hardly distinguishable from the freshly cut, although it looses its white color in the process. Smaller and green stalks may be dried on wire frames or wooden racks over the kitchen stove, similar to apples.

XIV

INJURIOUS INSECTS

While a number of different insects feed upon the asparagus plant, there are only two species which have so far become extensively distributed and caused serious damage in the United States. Both of these were imported from Europe, and are limited for their food supply to the asparagus plant.

THE COMMON ASPARAGUS BEETLE[A]

(_Crioceris asparagi_)

This beetle is by far the most important enemy of the asparagus plant.

It was first noticed in this country at Astoria, L. I., now a part of New York City, in 1859, but its actual introduction into that locality occurred about 1856. The injury inflicted by this insect is due to the work of both adults and larvae upon the tender shoots, which they render unfit for market, early in the season. Later they destroy, by defoliation, growing plants, and are particularly injurious to seedlings, the roots of which are weakened by having their tops devoured. Larvae, as well as beetles, attack the tenderest portions of the plants, but the latter gnaw with seemingly equal relish the epidermis, or rind, of the stems. The beetles are also accused of gnawing young shoots beneath the surface, causing them to become woody and crooked in growth.

The beetle ill.u.s.trated in Fig. 42 is a most beautiful creature--from the entomologist's point of view--slender and graceful in form, blue-black in color, with red thorax and lemon-yellow and dark blue elytra or wing covers, with reddish border. Its length is a trifle less than one-fourth of an inch.

[Ill.u.s.tration: FIG. 42--COMMON ASPARAGUS BEETLE

_a_, beetle; _b_, egg; _c_, newly hatched larva; _d_, full-grown larva]

From the scene of its first colonization in Queen's County, N. Y., the insect migrated to the other truck-growing portions of Long Island. It soon reached southern Connecticut, and has now extended its range northward through Ma.s.sachusetts to New Hampshire. Southward it has traveled through New Jersey, where it was first noticed in 1868, to southern Virginia. At present it is well established in the princ.i.p.al asparagus-growing sections of New England, of New Jersey, Delaware, and Maryland, and is present in Pennsylvania, New York, and Ohio. The question of distribution is an important one, as this species is rapidly extending its range. In a very few years we may expect its spread to other portions of the States in which it is now local, and later it will naturally move westward to Indiana and other States west and south of there.

The insect pa.s.ses the winter in the beetle state under convenient shelter, and toward the end of April or early in May, according to locality, or at the season for cutting the asparagus for market, issues from its hibernating quarters and lays its eggs for the first brood. The eggs are deposited endwise upon the stem or foliage, and in the early spring upon the developed stalks, usually in rows of from two to six, or more. In from three to eight days the eggs hatch, the young larvae, commonly called "grubs" or "worms," presenting the appearance indicated in Fig. 42, _c_. They at once begin to feed, and are from ten days to a fortnight, according to Fitch and others, in attaining full growth. When full grown the larva appears as in Fig. 42, _d_. It is soft and fleshy, much wrinkled, and in color dark gray or olive, which usually becomes lighter and yellowish with age. The mature larva enters the earth, and here, within a little rounded, dirt-covered coc.o.o.n which it forms, the pupa state is a.s.sumed. In from five to eight or more days the adult beetle is produced, which soon issues from the ground in search of food and of a suitable place for the continuance of the species. In Fig. 43 is shown a spray of asparagus, with the common asparagus beetle in its different stages, asparagus top at the right showing eggs and injury.

[Ill.u.s.tration: FIG. 43--SPRAY AND TOP OF ASPARAGUS ATTACKED BY BEETLES]

The duration of the life cycle is about thirty days from the time the eggs are laid until the insects attain maturity, but the time is shorter in the hotter parts of a season than in the cooler days of May or September. In the District of Columbia the eggs, in the warmest part of midsummer, develop in three days and the pupae in five days. From this it may be estimated that, in the very warmest weather, the development of the insect may be effected in about three weeks from the time the egg is laid. In colder climates and in spring and autumn the development from egg to beetle will require from four to perhaps seven weeks. In the northern range of the species, two and perhaps three broods are usually produced, and farther southward there is a possibility of at least a fourth generation. In the lat.i.tude of the District of Columbia the beetles usually disappear to enter into hibernation in the latter days of September.

The common asparagus beetle has very efficient checks in the shape of predaceous insects, which prey upon its larvae and a.s.sist in preventing its undue increase. One of the most active of these predaceous insects is the spotted ladybird (_Megilla maculata_ DeG.), represented in its several stages in the ill.u.s.tration (Fig. 44.) The adult of this beetle is rose-colored, with numerous black spots. The spined soldier-bug (_Podisus spinosus_ Dal.) and the bordered soldier-bug (_Stiretrus anchorado_ Fab.) are also useful as destroyers of asparagus beetle larvae, which they catch and kill by impaling them upon their long beaks and sucking out their juices. Certain species of wasps and small dragon-flies also prey upon the larvae. Asparagus beetles are very susceptible to sudden changes of temperature, and immense numbers of hibernating beetles are sometimes killed in winter during severe cold spells following "open" weather.

[Ill.u.s.tration: FIG. 44--SPOTTED LADYBIRD

_a_, larva; _b_, empty pupal skin; _c_, beetle, with enlarged antenna above]

_Remedies._--The common asparagus beetle, under ordinary circ.u.mstances, may be held in restraint by the simplest means. Chickens and ducks are efficient destroyers of the insect, and their services are often brought into requisition for this purpose. A practice that is in high favor among prominent asparagus growers is to cut down all plants, including volunteer growth, in early spring to force the beetles to deposit their eggs upon new shoots, which are then cut every day before the eggs have time to hatch. Another measure of value consists in permitting a portion of the shoots to grow and serve as lures for the beetles. Here they may be killed with insecticides, or the plants, after they become covered with eggs, may be cut down and burned, and other shoots be allowed to grow up as decoys. One of the best and least expensive remedies against the larvae is fresh air-slacked lime dusted on the plants in the early morning while the dew is on. It quickly destroys all the grubs with which it comes in contact. The lime may be conveniently applied by means of a whisk-broom or a Paris green sifter. Even dry road dust applied in this manner will have a beneficial effect. The special merit of these insecticides is that they can be used without the least danger upon young shoots being cut for market or home use.

Paris green and other a.r.s.enites, applied dry in powder, mixed with flour or plaster, or in solution, answer equally well, after cutting has ceased, and possess the advantage of destroying beetles as well as larvae. One pound of Paris green to a barrel of fine plaster makes a sufficiently strong mixture. It may be necessary to make two of these applications at intervals or as often as the larvae reappear on the plants. Powdered h.e.l.lebore mixed with flour, one part to ten, or in solution of one ounce of h.e.l.lebore to three gallons of water, is also very effective against the young larvae. Pyrethrum or buhach may be used in similar manner, and kerosene emulsion has been highly recommended by some experimenters. In hot weather, when the soil is dry, the larvae may be brushed or shaken from the plants so that they will drop to the heated ground, where they die, being unable to regain the shelter of the plants. Whichever methods for the destruction of this pest are adopted, unless the work be done thoroughly and with concerted action by all the growers in the section, the relief can not be permanent.

THE TWELVE-SPOTTED ASPARAGUS BEETLE

(_Crioceris 12-punctata_ Linn)

The presence of this insect in America was first detected in 1881, and it is still much rarer and consequently less injurious than the preceding species. In Europe, where it is apparently native, it is common but not especially destructive. The chief source of damage from this species is from the work of the hibernated beetles in early spring upon the young and edible asparagus shoots. Later beetles as well as larvae appear to feed exclusively upon the berries. The eggs are deposited singly, and apparently by preference, upon old plants toward the end of shoots, which, lower down, bear ripening berries, and they are attached along their sides instead of at one end, as in the case with the eggs of the common species. Soon after the larva hatches from the egg it finds its way to an asparagus berry, enters it, and feeds upon the pulp. In due time it leaves the first berry for another one, and when full growth is attained it deserts its last larval habitation and enters the earth, where it transforms to pupa and afterward to the adult beetle. The life cycle does not differ materially from that of the common species, and there are probably the same or nearly as many generations developed.

[Ill.u.s.tration: FIG. 45--TWELVE-SPOTTED ASPARAGUS BEETLE

_a_, beetle; _b_, larva; _c_, second abdominal segment of larva; _d_, same of common asparagus beetle]

This species is at present distributed throughout the asparagus-growing country of New Jersey, particularly in the vicinity of the Delaware River, the whole of Delaware, nearly the entire state of Maryland, the District of Columbia, the southeastern portion of Pennsylvania bordering the state line of New Jersey, northeastern Virginia in the vicinity of the western sh.o.r.e of the Potomac River, Staten Island, and Monroe County, N. Y., the last mentioned being the most northern locality known for the species. The mature beetle in life rivals the common asparagus beetle in beauty, but may be distinguished by its much broader wing covers and its color. The ground color is orange red, each wing cover is marked with six black dots, and the knees and a portion of the under surface of the thorax are also marked with black, as seen in Fig. 45, _a_. The beetle as it appears on the plant when in fruit very closely resembles, at a little distance, a ripe asparagus berry. The full-grown larva is shown in Fig. 45, _b_. It measures, when extended, three-tenths of an inch, being of about the same proportions as the larva of the common species, but is readily separable by its ochraceous orange color. Fig. 45, _c_, shows the second abdominal segment of larva, and _d_ same of the common asparagus beetle, much enlarged.

_Remedies._--The remedies are those indicated for the common asparagus beetle, with the possible exception of caustic lime and other measures that are directed solely against that species, but the habit of the larva of living within the berry places it for that period beyond the reach of insecticides. The collection and destruction of the asparagus berries before ripening might be a solution of the problem, but it is questionable if recourse to this measure would be necessary, save in cases of an exceptional abundance of the insect.