Papurau Newydd Cymru

Chwiliwch 15 miliwn o erthyglau papurau newydd Cymru

Cuddio Rhestr Erthyglau

10 erthygl ar y dudalen hon

Lectures on Fruit Culture.…

Newyddion
Dyfynnu
Rhannu

Lectures on Fruit Culture. By MR. J. L. PICKARD. The last lecture of this popular course was given on Friday evening before a capital audience. Mr. J. Allan Murray. B.Sc., professor of agricultural chemistry, presided. Mr. Pickard said that unfortunately the course had proved too short to deal with all our most popular hardy fruits. So far nothing has been said about cherries, or peaches, or nectarines, or figs, all of which .night be successfully cultivated Out-doors in favored situations in this neighbour- hood, so in order to meet the wishes of those who bad taken such a deep interest in the lectures, and in the reporrs of the lectures published in the ''Welsh Gazette" he would write one or two articles to complete the course, if the "Welsh GazettiJ" would kindly undertake to print them. To-night he said we must devote our attention to the pests aurl diseases wlÜch usually caused us so much anxiety and worry. It is no use buying high praised trees, and expending thoughtful care and intelligent interest in planting and growing them if we afterwards allow them to be attacked by pests and have the crops either wholly or partially destroyed, if there is any possible means of pre- venting their attacks. Perfectly healthy trees are rarely attacked by pests or diseases. Perhaps this almost sounds a platitude, but it is by no means a platitude when we examine closely into the matter. Take for instance a case where apple trees are planted in a badly drained or water logged soil, or in an unfavourable soil. The first sign we usually have that something is wrong, is that a great pro- portion of the apples come lopsided. They are no longer the round rosy [highly flavoured apples we desire. Then perhaps the following year a great deal of the apples fall before they are ripe, and many of the remainder small, badly cracked, and badly rusted fruit, totally unfit for human food. Then after a year or two the tree begins to canker; the bark cracks and :the stem gets covered with hard knotty swellings, and followed almost as a matter of course by that dreaded and almost hope- less disease known as American Blight. Prevention is better than cure in this disease, as in so many others that makes the lives of gardeners and those who love their gardens one continued strain of anxiety and worry. In almost all cases the first thing to go wrong is the soil. Directly the soil begins to get wet and sour, fungoid growths of some description or other begin to germinate Molds, mildew, rust, and canker, are all diseases of this class, and when once they get a foothold they reproduce themselves and spread very rapidly by means of spores and in germinating and develop- ing they give rise to disease and decay in the trees by extracting the nutriment that the trees have prepared for their own sustinariee. Finger and toe, or clubbing, in turnips and cabbages, are swellings brought about by the spores of a partic- ular variety of fungus. These swellings are at first filled with jelly, which afterwards changes into spores, and this gives risj to the rot which fanners dread so much. The potato disease is another of these fungoids, and so is the droning sickness and spot which so frequently ruins the tomato crops. If we wish to be clear of th.ese pests, then we must either kill the spores or prevent their entry into our plants. If hot quicklime is applied to the ground at the rate of one and a half pounds to the square yard, and forked in to a depth of four inches it is almost certain to destroy all spores that there may be in the soil. To get the greatest benefit from quicklime it should be purchased quite newly burnt, in big clots. Lay it in convenient heaps of, say a hundred weight each, on the ground where it is to be used, and cover it slightly with soil. After a day or two it will crumble into a fine powder; if this is spread evenly and forked lightly in to the soil it will do far more good than if the lumpy lime had been used, or if it had been merely slacked with water. This not only kills the spores, but it has the added merit of keeping the soil sweet and open. In addition to this, we can also prevent the spores from entering the leaves. All of you are familiar with the yellow spots that appear upon the leaves of potatoes and tomatoes when they are attacked by the diseases peculiar to themselves. Well, this is caused by the spores and the developed fungi using up or destroying the juices of the leaf. We can prevent the spores getting into the plant if we enly take precautionary measures early enough. They enter the plant through the leaf, and although the top part of leaves are usually tough enough to resist the spores, the under part is not, and it is this part of the leaf that we must protect. The best of all preventatives against fungoid diseases is undoubtedly what is shown under the name of Bordeaux Mixture. This is composed of four pounds of quicklime and six pounds of sulphate of copper dissolved in 100 gallons of water. If only a small quantity is required use five ounces of quick- lime, six ounces of sulphate of copper, and seven ounces of treacle to four gallons of water. Dissolve the copper sulphate in water and pass the quick- lime through a course bag with water into a basin, making sure to use up all the lime then gradually add to the copper, stirring briskly all the time. This smaller quantity is much stronger than the .arger mixture first given. and can easily prove worse than the disease if it is not properly mixed. If you are not sure that it is quite right put a bright blade into it. If the blade gets coated with copper then the mixture is wrong, and more lime should be added until it has no effect upon the blade. Do not add too much lime, however, or the mixture will be weakened. Spray it thoroughly on the under sides of the leaves either with a fine syringe or a knapsack sprayer. Nothing is so much relied upon as this mixture, and if it is applied two or three times in the early summer it will often be a complete preventative of the many kinds of spores that attack tomatoes, potatoes, onions, and plants in general. Sometimes apple, pear, and plum trees get what we call hide bound," the bark cracks, and this is often followed by decay. Some gardeners slit the bark as a sort of a preventative, but this is not only cruel and barbarous, but it provides breeding grounds for the spores we are trying to destroy. Where trees show a tendency to get hide, bound mix one pound of caustic soda and one pound of pearl ash in 10 gallons of warm water and syringe the trees thoroughly when tbev" are stationery in winter. This makes the bark elastic and effectually destroy. all the parisites. Root rot is one of the commonest of all diseases and is chiefly caused by sour soil, or when it is too wet, or where too much farm yard manure has been used. When the roots begin to rot canker follows as a natural course. Lord Suffield Apple is par- ticularly liable to canker, but it will not canker if the roots are not rotting, Root rot lays the founda- tion for milldew, for rust, and for tomato spot. The only way to get rid of root rot is to get more air into the soil. A free use of burnt clay and efficient drainage is the best of all preventatives and remedies. If the roots are badly rotted they should be cut well back, and be given a little new- soil in which to start afresh. Where canker ap- pears, cut surface with tar, or cover it with clay We now come to another class of pests that have made themselves only too well-known in Aberyst wyth and district this summer. Caterpillars are capable of doing a greater amount of damage in a shorter space of time than almost any pest that we are troubled with. We have been fortunate enough in the College Experimental Grounds to keep almost entirely clear of them by usinsr an emulsion composed of 4oz of guassa chips, and 4oz of soft soap to four gallons of water, and occasionally spraying the plants with it; yet most people have not been so fortunate as most of the green crops in the neighbourhood have been completely riddled by these insects. Although these things may be of absorbing interest to the E:1tymologist, the gardener chiefly confines his interest to destroying them, or if possible, preventing them taking up their quarters in his garden. Different varieties of grubs and caterpillars vary greatly in their appear- ance, yet their life history is pretty much the same. They all begin from eggs which the mother moth or butterfly deposits in some favourite or con- venient place, at some particular period of the year. After a period varying from a few days to a few weeks, grubs or caterpillars or lava are hatched out, and it is in this stage that they do the greatest amount of mischief in our gardens. Indeed it is no extraordinary thing to see them completely denude a plot of gooseberry trees of their foliage in two or three days. After they are fully fed up they enter into the pupa stage. They manufacture a sleeping bag which we call a I COC ton; they cover themselves up in this and go to sleep for a varying time, and when the emeree from tne cocoon it is as a perfect butterfly, or moth, or beetle. Some of these in turn deposit eggs in the crevises and niches of the trees and hatch out in spring ready to repeat their life history,, and ready to repeat their work of destruction. It would take far too long a time to enter into full details of the various grubs and caterpillars that infest or damage our fruit trees, so we must be contended by briefly noting a few of the commoner ones. The well known codlin moth is a very small one, but its caterpillars are very destructive in some orchards, They bore holes into the fruit and cause it to either drop off prematurely, or to decay rapidly when stored. Sometimes apples attacked by tne insect drop off as early as the begining of June, and continue dropping throughout" the summer. Upon examining apples that have dropped, or those showing signs of decay it will be seen that ;here is a. dark spot at the blossom end of the apple: a small hole can also be found there, round I which there is generally a collection of excreta and minute morsels of apple. If such apples are split fcr -MwirTttft—ii—i m —n— in halves a passage ("n be seen leading to the ovaries or. pip centres and it will genera £ y be found that the pips, or garts- of them have been oaten. If the caterpillar is-still there it wíW be fifcimd near the pips, or if It has gone, a hole will be-found in the side of thsariple through which it has escaped. Though this i-Vealled the codlin moth, it by no means confines its8ittacks to codlins, bat probably got this name because codlins are larger and( arly and make a greal show on the ground when they fall. Apples witi -ep, open eyes lfte*1 codlins, King Pipins, Blenheim Orange, and Margil are most likely to be infested. When the moth is at rest cfeiisg the day it is ac 'significant looking-' object, sitting on the branches or trunks of trees with its wasgs folded in the fc?m of a roof over its- body. I The motfermoth lays one eg^in the eye of each apple as soor.<as they are formed in May. After a. period of eighor nine days a ti vy baby caterpillar creeps out and bores its way into the apple, follow- ing the core down to the pips, upatt which it feeds. At the end of about three weeks ahe caterpillar is full grown, and having by this > time eaten the greater part of the pips it eats its way through the sides of the applo and makes its e:-iiti. If the apple is still on the tree it lets itself down to the ground by a silken cord and wriggles its way to the nearest tree and ascends it, building a little cradle in a convenient crevice with tiny bits of bark knit together with t h. finest and softest silk, and sur- rounds itself with a silk case gummed over with a sticky fluid. It stays here till tae approach of spring, when it spins a cocoon anI pupates, and shortly after develops into a full grown moth ready to deposit eggs on the newly formed apples. The apple blossom weevil frequently causes much harm to the apple and pear crops, and its injuries are frequently mistaken for the effects of white frosts, as the flowers turn brown or rust- coloured when attacked; but if the blossoms are closely inspected either the little yellow pupa of the weevil will be found in them or a little round hole in the side of the withered flower bud will be noticed, showing that the perfected weevil has cut its way out of its cradle. In the first warm (lays of spring the weevils issue from their winter retreats and find their way to the apple and pear trees. The female, either by flying or crawling, finds its way to the flower buds, and boring a hole with its snout places one egg within each bud, and care- fully closes up the hole, and the eggs are hatched in from three to five days. As-soon as the grub is hatched it begins to eat the samens and pistil, and the flower buds soon change to a rusty hue and decay. This stage lasts for about ten days, after which the perfected weevil lives amongst the leaves and branches and pass the winter in the r crevices or linchens of the trees, or underneath, stones or rubbish in their vicinity. The caterpillars of the Magpie- moth often cause serious injury to the gooseberry and currant crop; this insect must- not, howeves, be confounded with the better knouia goose- berry-sawfly. Their habits are totally different, and fortunately the caterpillars of the mag- pie moth are not nearly so numerous as the those of the sawfly. The caterpillars of the mag- pie moth live through the winter in the lerval srate, and are ready to attack the fruit bushes directly there is a vesiiage of green upon them. In the case of the sawfly grubs* they are hatched from eggs laid by the female flies upon the leaves in spring, and do not, therefore, appear upon the scene until vegetation is far advanced. Other two well known weevils are the raspberry and vine weevils, and they frequently do much harm by biting off the ends of raspberry, strawberry, and vine roots, and also peach and nectarine roots. The grubs burrow into and feed on the roots and crowns of the plants from September to March, and after April the weevils pierce the shoots and runners, and this causes the sap to escape just when it is required for the young fruitlets. Eggs are laid in the summer, and the grubs are found in the ei-.rth near to, and among the roots of plants, generally at a depth of two and a half to four inches. When the weevil emerges it at once attacks the plants near it, feeding only at night, and if disturbed it feigns death and remains im- movable for a long time. It is tenacious of life in an extraordinary degree, and in its weevil state disregards heat, cold, and the most pungent odours; indeed nothing but boiling water and turpentine seems even to annoy this insect. They are found most abundantly in the vicinity of old, neglected hedge rows or places where rubbish is kept. Daddy longlegs and cockchafers must not be forgotten as their grubs are most destructive. They are found chiefly in the fine dry soil about the roots of fruit trees, and'are most destructive to young trees: biting off the ends of their roots, and thereby checking their growth, if not killing them outright. Our old friends ? the wireworms too, deserve special mention. They are the larva of "click" beetles, so called because when held by one end it bends its body and produces a clicking sound. Wireworms are more to be dreaded than most other insects, because they feed upon roots at all I' times of the year, except during very hard frost?, when they go down deep into the earth. And as they live for four or five years in the wireworm stage, their work of destruction is of long duration. It lias very strong jaws, meeting over the mouth, and well adapted for biting roots and fibres. It is scarcely necessary to recapitulate the crops that are attacked by wireworms, and it may be said that hardly any crop is free from their ravages. Mustard appears to be the only crop they do not like, and if mustard is sown on the land in the autumn, and allowed to grow five or six inches high, and then dug in, it will generally protect the following year's crop from their ravages. And now as to preventative or remedial measures. Very little can be done in the egg, or butterfly stage. Butterfly chasing may possibly be fine fun I for the youngsters, but it would be rarely com- patable with the dignity of, say a staid and elderly Llanbadarn cottage gardener to take off his hat and chase them off his garden while the eggs are equally difficult to deal with. Experiments have been tried upon them with paraffin, turpentine, vitriol, and carbolic acid, and the result is usually to kill the trees, without causing the slightest inconvenience to the eggs, as they are protected by some description of shells. It is against the larva or grubs that our efforts must be directed. Many of these libernate during the winter, just under the surface of the ground, and if we find that they are doing serious damage, it would be a good plan to apply a dressing of gas lime, and dig the ground very deeply about the beginning of December, as by this time the grubs will have taken possession of their winter quarters. Before doing this, scrape all the rough loose portions of bark from the tree stems, and dust them thoroughly with quicklime, or with a mixture of quicklime and soot, or the stems may be limewashed. But it is little use doing this unless the rough bark has been first scraped. In order to prevent the caterpillars crawling up the apple trees, old bags should be tied tightly round the stems close to the ground earlv in the summer. These traps should be examined from time to time, and the caterpillars found in their folds destroyed from time to time. Grease bands are also useful for this purpose, and especially so in the case of gooseberry trees. Procure some grease f proof paper from the grocers, cut it into strips four I inches wide and tie securely round the stems a few inches from the ground. Smear this thickly with cart grease, or other fatty stuff, and renew the grease as the paper gets dry. it is difficult to apply insecticides advantageously without a knap- sack pump, but in cases it might be advisable to spray trees with the quassa, or Bordeau solutions already given. Three quarters of a pound of quassa chips to one pound of soft soap would be sufficient for ten gallons of water, and for bad cases this would be still further improved by the addition of half a pint of paraffin. Soak the chips in water all night, and boil them in the morning. Boil the soft soap in separate water and mix the two, adding the paraffin at the same time. If this is mixed thoroughly with a srynge it will form an emulsion that will be perfectly harmless to all foliage. Rose lovers should Make a note of this mixture, as it is a sovereign preventitave of all rose pests. All the insects we have discussed so far eat the foliage, or the flowers, or the roots of the plants, but we have another class of pests that are eq ually destructi ve, though they act in another way. The Greenfly is known by everyone, though their habits are not so well known as they ought to be. They are most peculiar insects, and are popularly known as green flies, though some people call them ants cows. Science has found this name truly given, for ants know well how to exile the tiny flie3, causing the sweet juices to flow upon which the wise little milkers delight to feast. If useful to the ants, however, the flies are harmful to our trees; and economic entomologists have devoted time and thought to the study of their lives, find- ing in flies themselves peculiarities more wonder- ful than the ants use of them. The females of those species tnat we are familiar with, irsi ead of laying eggs that arc fertilized by the males, pro- duce offspring by a process of budding. When a female is once fertilized she can lay eggs and pro- duce young all her life, and these can acrain pro- duce young without further impregnation unto the fourth or fifth generation. From the eggs which pass the winter only females are hatched, and these are known as stem mothers. These in turn produce female only, and these continue the pro- cess right through the summer, the multiplications being often almost incredibly rapid. In the autumn true sexual forms, both male and female are produced which pair, and the female lays a few eggs which the cold of winter and hatch in the spring irto the stem-mothers, which start the process now. The I mouth parts are not suitable, for cutting or bitintr, but they arc provided with long, tube like beaks, which they drive into the leaves, and suck up their ) juices. The mouth of each little greeu 11y is a I complete drive well outfit with a suction pump attachment.

---LECTURER IN PHILOSOPHY.

LECTURER IN AGRIuULIURE.

LECTURER IN MODERN LANGUAGES.

TALYBONT.

LLEDROD.

[No title]

-or;....,"---BARMOUTH. „„__i

AN ESTIMATE OF LONDON WEATHER.

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