Degenerate parsnipFig. 5.—Finger-and-toed degenerate Parsnip. Half nat. size.
Fig. 5.—Finger-and-toed degenerate Parsnip. Half nat. size.
Now, as every degenerate crop of parsnips will be found to offer a large proportion of such roots asfig. 5, we seem bound to conclude that, inasmuch as ourfig. 3represents a root in progress towards ennobling, sofig. 5is that of a root declining to its level,—in other words, degenerating; seed, therefore, that produces such roots can only come from a poor stock.
Our next fig. (6) is of a parsnip that had prematurely flowered. Sending up flowered stems the first year, in the case of a biennial, can only be looked upon as an instance of degeneracy. Plants that “run,” as it is termed, being comparatively useless, the best use, indeed, that can be made of them being that of pulling them up and giving them to the pigs.
Carrot run to seedFig. 6.Carrot of First Year run to Seed. Half nat. size.
Fig. 6.Carrot of First Year run to Seed. Half nat. size.
Now this propensity is always accompanied with forked roots, more especially in carrots, which roots are even more degenerate than those represented infigs. 3and5, as those were fleshy and succulent; but when the roots of runners are examined, they are always found to be tough and woody, and, in fact, they very nearly resemble the wild examples.
Forked carrotFig. 7.Forked Carrot run to seed.Half nat. size.
Fig. 7.Forked Carrot run to seed.Half nat. size.
Fig. 7is taken from a carrot that has run, and its rough, woody, nodular, forked root is fully apparent.
Forked Belgian carrotFig. 8.Forked Belgian Carrot. Half nat. size.
Fig. 8.Forked Belgian Carrot. Half nat. size.
Fig. 8, from a specimen of White Belgian carrot, forked as it is, is yet not uncommon; still, here the divided roots are succulent. This differs from the annual or run-to-seed roots, as this is a real biennial; but its other mark of degeneracy, besides that of finger-and-toe, was in its possessing a top (removed for experiment before the drawing was made) of many buds or heads. Now amultiheadedroot, whether in turnips, carrots, parsnip, or mangel, is another sign of degeneracy, especially in the carrot or mangel, as the wild examples are remarkable for this condition; and in ennobling these roots, one of the difficulties is to get rid of this propensity.Hence, at root shows all forked examples of bulbs, multiheaded and necky examples, should be rejected; they are, however, sometimes made so fat with manuring that they pass muster for size, which indeed seems to be thegreat quality required at shows: which is a serious mistake, as being no sort of criterion of the state of a field of roots, unless it be an adverse one: as a 10 lb. malformed root, with its huge top, will require more ground to grow than will half a dozen roots averaging 2 lbs. each; whilst the latter are certain to be better and will keep longer.
That the seed of malformed roots would be likely to produce a poor crop was a subject admitted by all; but neither the form nor extent of the mischief resulting therefrom had been stated upon the authority of exact experiment. In order, therefore, to arrive at direct evidence upon a point upon which so much of practical importance depends, we carefully carried out the following experiments.
Malformed parsnipFig. 9.A Malformed or Degenerate Parsnip. Two-thirds of nat. size.
Fig. 9.A Malformed or Degenerate Parsnip. Two-thirds of nat. size.
On the 26th of March, 1860, we selected two rootsfrom a store, namely, one of a Student parsnip from our own stock and one of a Skirving’s swede. Before committing these to the ground for the growth of seed, we made careful portraits of the two roots, of which that of the parsnip will be found infig. 9, that of the swede infig. 10.
Malformed swedeFig. 10.A Malformed or Degenerate Swede. Two-thirds of nat. size.
Fig. 10.A Malformed or Degenerate Swede. Two-thirds of nat. size.
Now had we been going to grow the best of seed, we should of course have selected the best-shaped roots for our purpose; but in this case, as will be seen, the most viciously formed examples were chosen.
Both of the examples whose portraits we have here given, were planted in our private garden (where, it is right to say, they were the only seeding specimens), in due time their seed ripened, which was carefully collected and stored.
Early in April, 1861, these seeds were sown in our experimental plots,without manure, in the following order:—
The plotbwas sown by way of comparison, and we can only regret that no plot of good swede seed was sown with the same object, and we must, therefore, compare with a piece of swedes in an adjoining field.
The following are the tabulated results:—
TABLE OF RESULTS OF EXPERIMENTS.
The roots from plotamay be described as small, though not so much fingered-and-toed as we had expected; still there was only about half the crop when compared with plotb, which latter, indeed, was only small in weight, which may be accounted for from being grown without manure. During their progress of growth the difference was very perceptible—the small leaves ofacontrasting most unfavourably with the broader, brighter coloured ones ofb.
As regards the swedes, they were indeed a very poor crop, presenting all the evils of degeneracy—neckiness, for which it will be seen that their parent was distinguished—want of a bulboid form; none of the 70 roots being better than a thin tap-root, and these were forked, shapeless, and fingered-and-toed in endless variety. Their spindle-shaped roots were quite remarkable, and they were the rule, although in good seed, however bad the soil, they would have been the exception. Those in the field hard by were bulboid, and averaged half a pound each—no great weight, as the land in which they were grown is only second-rate. They, however, were grown with manure, to which, of course, much of the difference is due, and yet not so much as may fairly be imputed to the difference in seed. From these experiments we conclude:—
1st. That a degenerate stock will, as a rule, result from the employment of degenerate or badly-grown seed.2nd. That besides ugly, malformed roots, degenerated seed does not produce nearly the weight of crop of good seed, under the same circumstances of growth.3rd. That by means of selection we may produce roots that are well-shaped, and have the capabilities of affording the best crop.4th. That by designedly selecting malformed degenerate roots for seeding, we may produce a seed that will result in as great or greater degeneracy.
1st. That a degenerate stock will, as a rule, result from the employment of degenerate or badly-grown seed.2nd. That besides ugly, malformed roots, degenerated seed does not produce nearly the weight of crop of good seed, under the same circumstances of growth.3rd. That by means of selection we may produce roots that are well-shaped, and have the capabilities of affording the best crop.4th. That by designedly selecting malformed degenerate roots for seeding, we may produce a seed that will result in as great or greater degeneracy.
“That these are important conclusions”—we quote from theAgricultural Gazette—“few will be disposed to deny. They have most interesting bearings on the subject of vegetable physiology, and consequently should be studied by the farmer.”
It is a practice much to be desired, that not only should a proper choice be made of seeding examples, but that there be a change of situation, and, if possible, a time of storage before being planted for seed. These are all cultivative processes, and to the care with which they are carried out must we look for permanence in our derivative root-crops.
It cannot be too strongly urged, that, as an efficient sort of root has only been arrived at as the result of great care—that is, by successful breeding,—so every care must be taken for its maintenance. Defect inseed results in defect in the produce of that seed; and downward tendencies of this kind are common results of even most careful cultivation. With carelessness in this respect we must not be surprised at rapid degeneracy.
In order to make the experiments which illustrate this chapter tell their tale to the fullest extent, we would set out with the two following postulates:—
1st. All well-grown, well-preserved new seeds should becapableof germinating to the extent of at least 90 per cent.2nd. Seeds in general, and more especially turnip seeds, as usually delivered to the farmer, are generallyincapableof germinating to the extent of from 25 to 30 per cent., and very frequently even more.
1st. All well-grown, well-preserved new seeds should becapableof germinating to the extent of at least 90 per cent.2nd. Seeds in general, and more especially turnip seeds, as usually delivered to the farmer, are generallyincapableof germinating to the extent of from 25 to 30 per cent., and very frequently even more.
We shall hereafter see, that this want of germinating power is too often the result of mixing charlock, Indian rape, and the like, by way of adulteration, which latter are killed to prevent “their telling tales.” But to our experiments:—
A number of tin cases were made of the following proportions: Length, 15 inches; width, 10 inches; depth, 4 inches. These, which were well perforated at the bottom, were divided across into ten equal parts, each of which was filled to within an inch of the rim, with a mixture of fine mould and silver sand. In these, seeds of different sorts of turnips were sown, and the whole was put into a bed of sand inour forcing-house. We could, however, see no difference in the results, nor could we trace any in the germinal or cotyledon leaves of swedes, turnips, or charlock. But, of course, samples of turnip-seed could not be tested as to freedom from charlock by this experiment, because charlock is killed before being mixed with the turnip.
Now, seeing that we could get no trustworthy results by this kind of experiment, it struck us that our germination-pans might be used to test the germinating power, not only of the samples we had obtained for a different purpose, but of others also. We first, then, counted a hundred of each of the following sorts of seeds, and carefully dibbled them in a fresh mixture of soil, in September, 1860; the results, which were as carefully noted from day to day, are shortly given in the following table:—
Table1.Germination of Ten Sorts of Turnips.
We would remark upon these results, that the temperature of the house was kept at between 60° and 70°, and the greater part of the seeds came up in four days; the numbers for the days, then, have reference to the time occupied before all that would germinate came up. Now this table is not a little instructive, as showing that samples of turnip-seed can be got in which only a very few of the seeds fail to germinate; but as experience had taught us that these samples by no means represented the usual market condition of turnip-seeds, in order to test this we begged to be allowed permission to take samples direct from the bags of a retail seedsman as they were exposed in his shop, and the following results will speak for themselves.
It should, however, be here premised that the samples were not grown by the seedsman, but were said to be just as received from the wholesale dealers.
Table2.—Germination of Ten Sorts of Turnip Seeds from Market Samples.
Eight samples of swedes from the same source are in the next table associated with a sample of Skirving’s swede, grown in our own garden (8), of the following table, and another of turnip (9), grown on a neighbouring farm. We may remark upon the last-named sample, that we had observed the growth of this seed, which was from a very poor crop, half of which had decayed on the ground with the early frost of 1860, and the rest, without transplanting or selection of any kind, was allowed to seed. Now, as this whole crop was so degenerated that it ought never to have been seeded at all, we were anxious to get some of the seed from the bulk, in order to test from its growth this year whether it will not bring forth a degenerate progeny. Its germinating qualities will be seen from the table, and yet it is by no means the worst sample, which seems to show that the others are not naturally bad, but so by mixture.
Table3.—Germination of Swedes, &c., from Market Samples, &c.
Now, as “0 0 0” seed is supplied to customers under the designation here given, for the purpose of mixing, it is of little consequence whether it be used by the wholesale house or the retail dealer; if, however, it be employed by both, we should, indeed, get a bad sample.
As regards the seedsman’s samples in theTables 2and3, we are quite unable to give exact details of their history, but we have reason to believe that the stock whence they were taken was purchased in the ordinary course of business from different “wholesale houses,” as, though the tradesman whence the samples came combines the business of “nurseryman” with that of seedsman, we happen to know that he is not a grower of seeds, at least of turnip seeds. The average, then, of eighteen samples of turnips and swedes from this source is that 28per cent.are non-germinating seeds. The next samples are from people in a large way of business, who are not mere retailers, but to whom we must accord all the immunities of the trade as seed-growers, wholesale and retail seed-merchants, &c.
Before giving the tables with the results as regards these samples, it is necessary to state that they were not sent to us direct, but were forwarded through a farmer to whom they were sent in the ordinary small packet samples.
We would further remark, that as all that would germinate took so few days about it, being an average of six days, whilst those ofTable 1, being seeds partly of 1859 and partly of 1860, occupied nine days, and those ofTable 2, whose date we do not know, eleven days; in all probability the seeds in question were tolerably new, most probably of the last seed season.
Table4.—Germination of Ten Samples of Turnips.
The specimens in next table were obtained in like manner as those ofTable 4.
Table5.—Germination of Samples of Common and Swede Turnips.
Of these samples we see that within a fraction of 30 per cent. is the average of non-germinating seeds, and this is only so low on account of two or three unusually good samples, the general range being from 20 to 30 per cent. of non-germinating seeds for the last twenty samples.
If we compare No. 5,Table 2, with No. 4,Table 4, we see a difference in the Orange Jelly Turnip; in the former little more than half came up, in the latter every seed. This is of importance, as showing what genuine seed may be, the latter being doubtless as unmixed as the former was mixed.
Now as regards the charge of mixing, we are not going to make it without some evidence. In looking over the tables we have now given, it will be seen that genuine seed has but a small per-centage of non-germinating seeds—say from 5 to 10 per cent.; but not only the examples herein referred to, with hosts of separate ones which have fallen under our notice, show a general amount of dead seeds, of from 20 to 30 per cent. For these figures compareTable 1withTables 2,3,4, and5. In those of the first lot the samples were sent direct to us from a seedsman, and their behaviour shows us clearly enough that good seeds are to be obtained, but the other tables are as clear that fromsomeseedsmen, at any rate, though inferior samples, they are as good as are actually sold.
That seeds are mixed we have, then, good internal evidence; but we are also in possession of facts more conclusive upon this important point, and we shall in this next chapter endeavour to enlighten our readers as to the art and mystery (especially) of turnip-seed adulteration.
Confining our present remarks to turnip seeds, we assert that if farmers will try the germinating powers from thebulkof the seed which may be sent to them, they will find pretty nearly one-third to be rubbish. It is of no use to try from samples, except in comparison with bulk; and if all the farmers of Great Britain did this, and would communicate the results, what an extraordinary tale would be unfolded, more especially if the evidence be completed by notes on the purity or otherwise of the crop grown from such seeds!
It has already been shown that turnip-seed is largely adulterated; it remains now to point out the nature of the admixtures, which may be summed up under the following heads:—
1st. Old seeds are mixed with new.2nd. Charlock, “Indian rape,” and other seeds of theBrassicaceæ, are mixed with genuine seed.
1st. Old seeds are mixed with new.2nd. Charlock, “Indian rape,” and other seeds of theBrassicaceæ, are mixed with genuine seed.
1st.—The crops of seeds vary so much in their produce per acre, in one year, as compared with another, that in most years there is a superabundance of some kinds and a scarcity of others.
Now, as most seeds are of comparatively little use except for sowing, the surplus stock can only be disposed of at extremely low prices. Accordingly some wholesale seedsmen buy large quantities in the “glut season,” as it is termed, and store them until the same articles fail in crop. For instance, swede and turnip seeds, 1857 crop, could be bought everywhere at from 15 to 20 shillings per bushel; but owing to the destruction of the roots in the winter of 1859, seedsmen in 1860 had to pay the growers 50s. per bushel. Now, in 1860 there were wholesale houses selling those seeds which they had by them for thesame price. Such people can, it is true, warrant their seeds to be genuine, as they well know how much turnip-seeds deteriorate by keeping; the mixing of this with good seed is still a species of adulteration; and if not mixed at all, we can then only say that the evil is so much the greater.
As an evidence of the amount of deterioration caused to turnip-seeds by keeping, we here re-produce the table of trials of ten sorts of good seeds made in September, 1860, in contrast with experiments from the same sample, in the same month of the present year (1862), premising that the samples were kept in what we should consider a dry but not too warm a temperature.
These figures are interesting as showing that though the different sorts are not affected equally, yet the seed of 1859 failed on the average to the extent of38.8 per cent., as against 24.6 for the seed of 1860, and 28 as the average of the whole samples. Such is the great difference between two and three year old seeds.
2nd.—Even the abovegenuine seeds(!) are not unfrequently mixed, and we may now examine the nature of some of these mixtures. Charlock and Indian rape are allpreparedfor this purpose: that is to say, they are rendered incapable of germinating before mixture—“Dead men tell no tales.” Now rubbish, so prepared, is well known in the trade as 000 seed. Under this denomination all seedsmen know it, and it can be procured by the trade at about 7s. per bushel.
With respect to this 000 seed, we direct attention to the following letter addressed to a most respectable firm.
Southampton,April 27, 1860.Gentlemen,—Being in possession of a new and improved method of killing seeds without the use of any chemicals, so that the seed when in a 000 state has not that unpleasant smell it has when killed by the old method, and does not look perished if it be crushed. A man by the new process may kill ten or twelve quarters per day, and the apparatus is so constructed that it is impossible for a single seed to leave it alive; and one great advantage is, that if you want a sack of 000 seed in a hurry you may kill a sack of rape or turnip, or any seed, and have it fit for use in an hour. Seed in the process of killing increases in measure and weight, and when you send it out to be killed, of course, the seed-killers keep the extra weight and measure. If you think it worth your attention, I will send you a small working model, so that you may kill a few pounds of kale or cauliflower, or any small seeds in a few minutes, and instructions for making a large one on receipt of a Post-office order for £2.Yours truly,——
Southampton,April 27, 1860.
Gentlemen,—Being in possession of a new and improved method of killing seeds without the use of any chemicals, so that the seed when in a 000 state has not that unpleasant smell it has when killed by the old method, and does not look perished if it be crushed. A man by the new process may kill ten or twelve quarters per day, and the apparatus is so constructed that it is impossible for a single seed to leave it alive; and one great advantage is, that if you want a sack of 000 seed in a hurry you may kill a sack of rape or turnip, or any seed, and have it fit for use in an hour. Seed in the process of killing increases in measure and weight, and when you send it out to be killed, of course, the seed-killers keep the extra weight and measure. If you think it worth your attention, I will send you a small working model, so that you may kill a few pounds of kale or cauliflower, or any small seeds in a few minutes, and instructions for making a large one on receipt of a Post-office order for £2.
Yours truly,
——
To this the Messrs. Sutton append the following remarks:—
The writer of the above being unknown to us, we had the curiosity to call at the address given, and ascertained that it was no “hoax,” but was assured by the “inventor” that he had supplied several tradesmen with the apparatus, and that he wasformerlyin the seed trade himself. We may add, that we have since heard from the same individual at another sea-port town to which he has removed.
The writer of the above being unknown to us, we had the curiosity to call at the address given, and ascertained that it was no “hoax,” but was assured by the “inventor” that he had supplied several tradesmen with the apparatus, and that he wasformerlyin the seed trade himself. We may add, that we have since heard from the same individual at another sea-port town to which he has removed.
Having got possession of this circular, and being desirous of becoming acquainted with so notable an invention, we lost no time in setting on foot a negotiation for the possession of the secret, and having traced the inventor in his removal from Southampton to Gosport, we then had letters addressed to him upon the subject, and, if promises had been of any avail, we might possibly at this time have been in possession of a very improved and expeditious method of making 000 seeds, only that we have learnt the undesirable nature of pay beforehand.
Our next inquiry was for a sample of 000 seed itself; but, although it is well known in the trade, we have hitherto failed in procuring it. We had hoped that our seedsmen might have been able to procure some through some of their friends. The result was, that we made application to a most respectable London firm, receiving the following reply:—
London,February 27, 1861.Sir,—In reply to your favour received this morning, we take leave to say that we shall have pleasure in complying with your request for a sample of 000 turnips, if we can obtain it. But we do not keep it ourselves, nor do we know the parties who prepare it, it being something of a trade secret. We will, however, apply to some of our friends here to let us have a small quantity, but doubt if they[41]will let us have it, as it is a matter they are rather chary respecting, andalthough perfectly well known and understood in the trade, they do not care to have it known beyond, and our asking for a small quantity will be sure to lead to the question, “What do we want it for?” We could obtain a large quantity without hesitation.We remain, &c.,——
London,February 27, 1861.
Sir,—In reply to your favour received this morning, we take leave to say that we shall have pleasure in complying with your request for a sample of 000 turnips, if we can obtain it. But we do not keep it ourselves, nor do we know the parties who prepare it, it being something of a trade secret. We will, however, apply to some of our friends here to let us have a small quantity, but doubt if they[41]will let us have it, as it is a matter they are rather chary respecting, andalthough perfectly well known and understood in the trade, they do not care to have it known beyond, and our asking for a small quantity will be sure to lead to the question, “What do we want it for?” We could obtain a large quantity without hesitation.
We remain, &c.,
——
The sentence we have placed in italics will be quite sufficient to show how well the matter of 000 seeds is understood in the trade, and how easy it is to get bushels of it, no questions being asked, while a small quantity, required only for investigation, may be refused.
It appears, then, that the machinery exists by which any one in the seed trade may quietly and easily commit enormous frauds. And it is plain that the very notoriety of this machinery, together with the condition of many of the samples of seed which we have examined (seeChap. VI.) prove that this machinery actually is employed by many seedsmen to the great injury of their customers.
We cannot, then, be doing wrong in urging any one to make trial of the seeds he is about to buy before he sows them, or even before he purchases them. Where the experience of a number of years already exists, the character of the seedsman is a guarantee for the good quality of his goods, and experience of this kind is indeed a more perfect carrying out of the system of preliminary trial or experiment, which we recommend especially to all new customers.
Root-crops are especially liable to injury from the depredations of insects. Thus the turnip may have its seed more or less destroyed by weevils. Immediately the seed appears above the ground, commences the attack by the turnip flea-beetles. The bulb is pierced by beetles, ending in those excrescences called “turnip-warbles;” and there is reason to think that even the root-fibrils are in some soils made the depositories of the eggs of insects, which give rise to extraordinary malformations.
Carrots and parsnips are liable to have the best-grown root made useless by its being pierced and eaten by the larvæ or grubs of a small fly, known as thePsila rosæ.
Even the mangel-wurzel, which has been so strenuously recommended as a substitute for the turnip on account of its freedom from insect attacks, and connected with which Curtis only describes a single insect, a leaf-miner, calledAnthomyia Betæ, upon which he remarks that “these insects will seldom cause any loss to the mangel-wurzel crops should they ever abound to any extent.” In spite, however, of this, we find that the increased growth of this crop has caused a corresponding increase in the insect, to such an extent that, during the last two seasons, many crops have entirely failed from itsdepredations; as witness the following communication to theAgricultural Gazettefor August 23rd, 1862:—
My mangel crop was drilled the 17th May, and came up most favourably. On Monday, the 2nd June, I asked my bailiff what was the matter with it; he said, “Oh, it was a sharp frost last night;” but on examination I found that instead of frost the leaves had within them a maggot, which had caused the plant to brown and die off. The late rains and growing weather have enabled the plant somewhat to revive, and also fresh plants to come up (for I had drilled 7 lb. per acre), but found to-day several leaves with maggots in them. My man told me “a quantity had eaten themselves out of the leaf and dropped;” and that he saw “a vast number of sparrows picking up those maggots.” I send you herewith some plants I brought up from the farm. My idea is that the seed was damp and bred the maggots, or that the leaves had been “struck with a fly,” and then the maggot followed. You will please let me have your ideas upon these points.—S. S.
My mangel crop was drilled the 17th May, and came up most favourably. On Monday, the 2nd June, I asked my bailiff what was the matter with it; he said, “Oh, it was a sharp frost last night;” but on examination I found that instead of frost the leaves had within them a maggot, which had caused the plant to brown and die off. The late rains and growing weather have enabled the plant somewhat to revive, and also fresh plants to come up (for I had drilled 7 lb. per acre), but found to-day several leaves with maggots in them. My man told me “a quantity had eaten themselves out of the leaf and dropped;” and that he saw “a vast number of sparrows picking up those maggots.” I send you herewith some plants I brought up from the farm. My idea is that the seed was damp and bred the maggots, or that the leaves had been “struck with a fly,” and then the maggot followed. You will please let me have your ideas upon these points.—S. S.
The maggot, or larvæ, here described is that of a fly called theAnthomyia (Pegomyia) betæ, mangel-wurzel fly. An allied species will sometimes be found on the common dock-leaves, mining their galleries between the dermal cells of the leaves.
We have for some time observed the increase of this pest, and we are prepared to state that now we seldom see a crop that is not greatly injured by its attacks. Mr. Curtis thinks that the best method to destroy them is to employ boys to crush the leaves between the thumb and fingers at the part where the larvæ can be seen; and with this we fear we must for the present be content, unless we could devise some means to take the fly before its eggs are laid in the leaves.
We need not here dwell at length upon the natural history of those pests of the turnip—theHaltica nemorum(striped flea-beetle), andH. concinna(blackflea-beetle), as the nature of their ravages are tolerably well known. Thus much, however, may be said; namely:—
a.These insects are called fleas because they have the power of hopping on being disturbed, much after the manner of a flea.b.They have some five or six broods each year; the earlier ones probably being bred on charlocks and other weeds of the same natural order as the turnip; and hence, then, charlocks are pests, not only as being weeds, but as breeding-places for one of our most mischievous insects.c.They migrate from their weed-haunts to the first crop of turnips, where much of their mischief may be prevented by simply dusting over the young plants with any fine powder, road-dirt answering the purpose as well as anything else.
a.These insects are called fleas because they have the power of hopping on being disturbed, much after the manner of a flea.b.They have some five or six broods each year; the earlier ones probably being bred on charlocks and other weeds of the same natural order as the turnip; and hence, then, charlocks are pests, not only as being weeds, but as breeding-places for one of our most mischievous insects.c.They migrate from their weed-haunts to the first crop of turnips, where much of their mischief may be prevented by simply dusting over the young plants with any fine powder, road-dirt answering the purpose as well as anything else.
Various devices have been employed for keeping away and killing these little creatures. We have used a contrivance for catching them, which may be described as follows:—
Some thin board (or boards), making a surface of about 4 feet long by 2 feet wide, is furnished at one end with a pair of light wheels of just sufficient diameter to lift the board about 2 or 3 inches above the plants. To the other end may be attached two crooked handles in such a manner that the machine can be wheeled flatly over the plants, or if four wheels be employed, one at each corner, a single handle can be used either to push or pull the implement. Whenused, it should have its underside painted over with tar or any handy viscid substance.
This should be used on bright days, the operator pushing it over the rows of turnips, so as, if possible, not to throw his shadow before. The middle of the day will be best, not only for this reason, but also because these creatures feed more actively at that time.
Now, our experience in the use of this simple contrivance on small experimental plots convinces us that a small boy could easily keep under the enemy in a good-sized field.
But now comes a very important question for consideration. Cannot we do more than kill a few of these creatures? cannot we adopt such plans as will render ourcropstolerably safe from their depredations? We think so, and to this end advise the following method of proceeding:—
Let each turnip-grower prepare for the enemy by sowing from the eighth to a quarter of an acre of turnips in a sunny part of the farm as early as the first week in April. These patches would quickly attract all the turnip flea-beetles from the wildcruciferæon which the first broods seem to depend, and in this small compass they can be killed in detail with the simple contrivance just described, so that when the real crop comes up there will be none, or at least only a few, beetles to emigrate to it; whereas, as we now manage, by the time the crop of turnips is sown, enough of the creatures are too often bred to render it necessary to sow two or three times before we can secure a crop.
Anburyis an affection to which only the different sorts of turnips are liable, in which case it differs from finger-and-toe, with which it has been very much confounded, as this latter occurs in all kinds of roots; namely, turnips, carrots, mangel-wurzel, &c., as well as both the common and Swedish turnips.
As a sample of an extreme case of finger-and-toe—digitateroot,—we repeat the followingfigureof a Belgian carrot, in which it will be seen that the forks gradually taper to the extremities; in fact, the whole, instead of being a succulent fleshy tap orfusiformroot, in which case it could readily be stored, is divided in fingers-and-toes, which are liable to break off, and this renders the product next to useless. Now, this affection may occur in any soil, as it is the result of a degeneracy in the stock of the plant; but in the affection now to be described the case is wholly different, as here the bulk of the swede (fig. 12) is affected with rough, cancerousknobs, whilst the rootlets support irregular knobs of a like kind, which have more the aspect of suspended rows of ginger than fingers-and-toes.