The spiral hop, high mantling, how to train No common care to Britain’s gen’rous sons, Lovers of “nut-brown ale”—sing fav’ring Muse!
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A glance at statistics will show the truth of our statement. In 1882 the return per acre did not average more than 1½ cwt. on account of a perfect plague of aphides; while in 1859, which is about the best hop year of the century, the return was 13¼ cwt. per acre. The average yield during the last seventy-six years is about 6¾ cwt. per acre; not a very large return for the outlay. In 1839 a certain hop plantation in Kent of about 21½ acres, produced 15 cwt. per acre, and in the following year only 1 cwt. per acre.
These extraordinary variations in the production of hop gardens are caused by insects and the weather. Early in the year, when the vines appear well grown and sturdy, the hop-grower may with a light heart, perhaps, prophesy a good crop. In May a few aphides—winged females—are noticed, and in August the silvery brightness of the delicate bracts is blackened and spoilt by the filth of the lice—larvæ of the hop aphis. About September a mighty wind comes; poles are blown down in all directions, the ground is strewn with the cones blown from the vines, and branches are bruised, causing the cones on them to wither and decay before picking-time. Just as the hops are ripening two or three cold nights perhaps occur, which throw them back and materially reduce the value of the crop. Then they may be attacked with mildew, or even when all evils have in most part been avoided, picking-time has all but arrived, and the hop-grower is congratulating himself on his good fortune, a shower of hail may happen, stripping the vines and reducing the value of the crop by three-fourths.
Miss Ormerod, consulting entomologist to the Royal Agricultural Society, has given much study to, and thrown considerable light upon, the hop aphis. The course of the attack upon the hop she has discovered to be as follows:—The aphis first comes upon the hop in the spring in the form of wingless females (depositing young), which ascend the bine from the ground. The great attack, however, which usually occurs in the form of “fly” about the end of May, comes from damson and sloe bushes as well as from the hop; the hop aphis and the damson aphis being, in Miss Ormerod’s opinion, very slight varieties of one species, and so similar in habits that for all practical purposes of inquiry they may be considered one.
From experiments made on hop grounds in Hereford, the use of various applications round the hills in the late autumn or about the beginning of April, completely prevented attacks to the vines of those hills until the summer attack came on the wing. Paraffin in any dry material spread on the hills, proved serviceable both as a preventive {91} and a remedy, and petroleum and kerosine were also used with advantage. Among the methods of washing, the application of steam power opens up a possibility of carrying out these operations with rapidity and at less cost. When the fly is very bad, the common practice is, after the picking is over, to clear the land of bine and weeds and to place quicklime round the hills or plant centres.
When the hop is fully formed, shortly before picking, if the weather be hot and close, almost the whole crop may be destroyed in a few days. The aphides penetrate the hop and suck from the tender bracts the juice, some of which exudes; this, the moist weather retarding evaporation, produces decay at the point of puncture, and a black spot shows, technically called “mould.” The great enemies to the lice are the ladybirds, which devour them greedily, and a hop-grower would as soon destroy a ladybird as a herring fisherman a seagull.
It has been recently suggested that the suitability or not of soil for hop-growing, depends upon the presence or absence of sulphur, which is an essential ingredient of hops. There is more than one instance on record where hops treated with gypsum (sulphate of lime) were free from mould, while in adjoining gardens the hops not so treated suffered severely. The hops least liable to blight and mould contain the largest amount of sulphur. A curious fact has been proved in Germany by careful analysis. In plants attacked by the hop bug the proportion of sulphur is much greater in the healthy and unattacked leaves than in those infested with the bug. This subject hardly comes within the range of our work, and we merely mention it to bring it into notice among hop-growers, whom further experiments with gypsum may possibly benefit. It is obvious that as the chief attack is made by aphis on the wing, dressings put on the ground with a view to kill the aphides in the soil are of little avail, for from a neighbouring or even a distant garden where the hills have been not so treated, may come a flight of aphides causing desolation in their track. If, however, sulphur can be imported into the live plant, and such plants are untouched by the fly, it would seem that we are near a solution of this very vexed problem. We know of an instance where the hops on one side of a valley were totally destroyed by the fly, while on the other side they were untouched. The wind setting in one direction during the flight, had carried the fly over the sheltered side, and deposited them on the exposed side of the valley.
Not to mention extraordinary tithes in this portion of our subject would be a serious omission. Formerly our worthy pastors were paid {92} with a tenth of the actual produce of the land, now they receive what are in theory equivalent money payments. As orchards, market gardens, and hop gardens were deemed to yield much greater returns than other land, the tithe on them was fixed at a much greater rate than on pasture and arable land. While the tithe on these latter is but trifling, the tithe on the former is about thirty shillings per acre. When few foreign hops were imported, these very extraordinary tithes could be paid, but now they are a most serious, not to say unjust, tax on the hop-grower who in very bad years may not make thirty or even twenty shillings per acre. It is common knowledge that a great agitation is on foot to obtain their abolition, and there appears to be a very general feeling that no land ought in the future to become subject to extraordinary tithe by reason of any crop which may be grown on it. At present the extraordinary tithes are a check on production and the most advantageous cultivation of land. Being thus prejudicial to the welfare of the State, they should have been abolished long ago, and no doubt would have been, but for the circumstance that the immediate sufferers are comparatively few in number.
The hop gardens of Kent not only provide the brewer with the best hops, but, as each autumn comes round, afford to some thirty thousand or so of the poorer classes living in the densely-populated districts of the east of London a few weeks of country life. The East-Enders, indeed, look upon hop-picking in Kent, Surrey, and Sussex as their particular prerogative, and mix but little with the “home” pickers, who, however, are almost equal to them in numbers.