One Thousand Questions in California Agriculture Answered · Chapter 4Part I. Fruit Growing (4)
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Summer pruning would be perfectly proper and advisable. Summer pruning immediately after the fruit is picked, has become much more general, and winter pruning has proportionately decreased. Young trees are winter pruned to promote low branching and short, stout limbs; bearing trees are summer pruned to promote fruit bearing and check wood growth - the excess of bearing shoots being removed by thinning during the winter.
Wild Cherries.
Where do the Mahaleb and Mazzard cherries grow naturally? How large are the trees, and what kind of fruit do they bear?
The Mazzards, of which there are many, and some of them wild in the Eastern States, are counted inferior seedlings of the species avium, and are tall, large trees, the fruit being small and rather acrid and colors various. The Mahaleb is a European type with a smaller tree, fruit inferior to the Mazzards, and used as a root under soil and climatic conditions under which the Mazzard is not hardy and vigorous. Neither of the kinds are worth considering for their fruit.
Pruning Cherries.
I have some cherry trees that have not been pruned. They are beautiful trees, but it a requires a 24-foot ladder to get near the top limbs. The side limbs reach from tree to tree. They had a splendid crop this year. People here tell me never to prune cherry trees. One man who claims considerable experience with fruit says prune them as soon as the crop is off.
Your cherry trees should have been pruned for the first two or three years quite severely, in order to secure better branching and strength in the main branches. If this is done, and the trees come into full bearing, very little pruning has to be done afterward, except removing diseased, interfering or surplus branches, if there are too many. It is perfectly safe to cut back the trees which you now have as you have been advised to do, after the leaves have fallen or after they have begun to turn yellow. The trees can be safely topped and thinned, for the cherry accepts pruning very readily. Even considerable amounts of the tops have been cut off at fruit-picking time from trees which have been running too high, so that the fruit could be secured, and this has not injured the trees, according to our own experience and observation. Cherries can be summer-pruned to check excessive growth and to promote fruit-bearing, but as your trees have already begun to bear well, this treatment does not seem to be necessary. You should do fall and winter pruning for the shape of the trees.
Training Cherry Grafts.
I have grafted a lot of seedling cherries, leaving two or three buds on each piece of grafted wood. In planting these out, shall I put the union under ground (they are grafted at the crown of the root) and shall I loosen the cloth a little later when they start to grow? How can I get the head for the tree? Should I let only one shoot form, and when it is as high as I want it, cut it off as I would a tree gotten from a nursery?
If you have used waxed cloth in your grafting, it will be necessary to loosen it after the tree gets a good start. Common unwaxed cloth could be trusted to decay soon enough, probably, but it should be looked at to see that it is not binding. The union should not be placed much below the ground surface, although it can be safely covered, and the future stem may look the better for it. One shoot could be allowed to grow from each graft, choosing the best ones and pinching the others so that they will stop extension and hold leaves during the first season. These can be cleanly removed at the first winter pruning at the time you head back the main shoot to the proper height.
Restoring Cherry Trees.
I have about two acres of cherry trees in Sonoma county said to be about 20 years old. They are in a very neglected condition and I am desirous of putting them in good shape for next year's crop. They are in a very light sandy loam sail which is easily worked.
Cherry trees under good growing conditions and proper care are very long lived in California and bear abundant crops when thirty and more years of age. In the San Jose district and elsewhere there are orchards considerably older than the limit stated and are still very profitable. If your trees have been so neglected that the branches have died back, the trees should be pruned, of course, cutting out all dead wood and shortening weak or dying branches to a point where a good strong shoot can be found. Then a good application of farmyard manure plowed in during the rainy season, followed by summer cultivation for moisture retention. Although the cherry is very hardy, it is quite likely to suffer on light soils which become too dry. On such soils as yours there is little if any danger of too much water in the winter, unless the land lies low, but the injury to the tree comes from the lack of moisture during the summer time, and this, with your abundant rainfall, you can probably assure by thorough summer cultivation.
Renewing Cherry Trees.
We have cherry trees set out diamond shape about 16 feet apart. We cannot take out every other tree and have any order, so we ask you if it would be possible to cut the trees back and keep them pruned down to a smaller size. The trees are about 20 years old and are dying back quite badly.
If the trees are dying for lack of summer moisture it is idle to do much for them until you can give them irrigation right after the fruit ripens. The cherry tree takes kindly to cutting back and will give good new fruit-bearing shoots if the roots are in good condition. It is desirable to remove surplus branches entirely rather than to cut back everything to a definite height, the branches to be removed being those which show disposition to die back and those which are running out too far so as to reduce the space between the trees or to interfere with branches from other trees. Branches which are failing above can in some cases be cut back to a strong thrifty lateral branch below. Shortening-in branches high up is less desirable because it forces out too much new growth in the top of the tree and carries the fruit so high that picking would be expensive. All cuts of any size should be painted to prevent the wood from checking.
Pruning Cherries.
I have cherry trees in their third season which have been given the usual winter pruning. The trees are putting forth a great many more branches than are required, and naturally many of the branches are growing across the tree. In cutting these extra branches, I am informed that there is a way to trim them so that they will eventually form fruit spurs. I had an idea that in order to do this it would be well to cut about one inch from the main branch. Some one has told me that this would merely cause the little branch to sprout again.
Cherry shoots which are not required or desired for branch-forming can be transferred into fruit spurs, if the tree is of bearing age, by shortening them in. Do not, however, cut at an arbitrary distance of one inch from the starting point, but rather save one or two buds at whatever distance from the starting point these may be growing. If the tree is too young to bear, only growth shoots may appear from these buds, but they are likely to be short and will support fruit spurs later. This practice should not be carried to excess or you will have too many small shoots which will not get light enough to bear good fruit, even if fruit spurs should appear.
Pollination of Black Tartarian.
There are many old Tartarian cherry trees around our district that have only borne a few cherries in years. There are Bing, Royal Ann and Early Purple Guignes here with these, but they seldom, if ever, bloom with the Tartarian at the proper time to pollinate. What varieties would cause the trees to bear?
Sterility of the Black Tartarian is rather unusual. In the coast regions, Bing, Black Tartarian and Early Purple Guigne are all considered pollinizers for the Royal Ann. Inversely all these should be pollinizers for the Black Tartarian, if that variety requires such assistance, which we have all along supposed that it did not.
Treatment of Fig Suckers.
A few young fig trees are not growing from the tops, but are sending out suckers, in some cases above and others below the point of grafting. Had I better let these suckers grow and see what comes from them or plant new trees?
Graft near the ground all those which are sending suckers from below the graft. Suckers from above grafting point can be trained into trees by selecting the best, tying to stakes to straighten up and removing all other suckers but the one selected.
No Gopher-proof Fig Roots.
Is it necessary that figs should be grafted in some other roots to keep the gophers from destroying the trees? What root should I order?
Figs are not grown on any other than fig roots and are generally propagated by rooted cuttings for the purpose of avoiding the expense of grafting. The fruit must then be protected by killing the gophers rather than by an effort to get the tree upon a gopher-proof root.
Pollination of Bartletts.
Would Clapp's Favorite be a good pollinizer for the Bartlett as well as the White Doyenne?
The white Doyenne and the Clapp's Favorite usually begin to bloom three or four days later than the Bartlett, but the Bartlett period extends about ten days into the blooming period of the others. Therefore, your question is to be answered in the affirmative; that is, if the Bartlett needs pollination, it will be likley to get it from either of these varieties.
Comice Pears.
Would you plant Comice pears instead of Bartletts, and why? What is their behavior as to bearing? Do they require any different treatment than Bartletts? What roots? Do they need other varieties for pollinizing?
Do not plant Cornice instead of Bartletts except for those who have tested out the Cornice to their production and selling. Though satisfactory in some places, it makes no such wide record of success as the Bartlett and should be planted only on the basis of experience with it. Its propagation and culture are the same as other pears. It takes to the quince all right if you want dwarf trees. We have no record of its pollination needs, but as the Bartlett in California defies its Eastern reputation for self-sterility, it is likely that Cornice may also take care of itself, for it is not handicapped by such Eastern condemnation.
No Pears on Peach.
I saw, the other day, some Bartlett pear grafts in Salway peach trees, and the party informed me that he had seen three-year-old grafts that had pears last season. I would like your opinion, as I always thought that such a union was not possible.
Our opinion is like yours, and seeing some pear grafts set in peach branches would not convince us that they would grow or bear fruit.
Pigs in the Orchard.
I have an orchard of Bartlett pears about fifteen years old, located on sediment land. I desire to set this to alfalfa, and to feed the alfalfa by letting hogs eat it off, thereby leaving the droppings on the land. What I wish to know is this: Will this crop be beneficial or injurious to the trees?
Alfalfa can be successfully grown in an orchard, providing you have irrigation water so that the alfalfa shall not rob the trees of moisture; otherwise it is a very dangerous practice. The practice of running animals of any kind in an orchard is to be condemned. Pigs are particularly liable to injure trees by gnawing the bark, and we have seen fig trees barked clean as high as a pig could reach by standing on his hind legs. Of course, if you try an experiment for your own satisfaction, you will have to watch the pigs very carefully. It is true that growing pasture crops in an orchard and grazing, it off is injurious to trees, because the land lacks proper aeration, and good orchard cultivation is even more necessary in this State than in humid climates. Therefore, unless you are sure of a good water supply for irrigation, it would be altogether safer to give the whole land to the trees and keep them cultivated well, or else dig out the trees and use the land for other purposes.
Dwarf Pears Not Commercially Grown.
Will you kindly give the experience of pear growers in California who have grown the dwarfs? If you can give me the data or refer me to persons who can give data showing that the growing of dwarf pears can be made a commercial success the information will be of great value.
There is no commercial growing of dwarf pears in this State, except some trees owned by the A. Block Company, Santa Clara. The late Mr. Block had an old orchard of dwarf trees, planted perhaps forty or fifty years ago, which he converted into an approach to a standard orchard by removing alternate rows, and the trees being otherwise treated like standards have been satisfactorily producing pears for many years. How far these trees are still on the dwarf roots and how far they have supplied themselves with roots from the variety growth above, we do not know. There is no disposition whatever to plant dwarf trees in this State except among a few amateurs who are making home fruit gardens. In view of the successful growth of standard trees in this State, there seem to be no adequate reasons for recourse to dwarf trees.
Yield in Drying Pears.
What is the loss of weight in drying Bartlett pears?
They run from 7 to 8 lbs. of fresh pears to 1 lb. hard dried. There is quite wide variation according to condition of the fruit. Probably about 7 1/2 to 1 would be as near a realizable ratio as you could get by arbitrary estimate.
Pear Problems.
Kindly let me know the advisability of grafting Bartlett pears onto apple trees. In replanting pears in young orchard, how would it do to take rooted pear suckers, graft the Bartlett on them, and save the cost of nursery stock? Last year my five-year-old Bartlett orchard was full of blossoms, but, though many pears became as large as white beans, the majority of them dropped.
The pear and apple do not make a good union. The grafts may grow for a while, but finally fail. Do not use suckers as stocks. You can dig up some year roots and use them as starters by making root-grafts with Bartlett scions and do better than with suckers, but a good pear seedling is the proper thing either for budding or root grafting. Unless you have some experience in such work, it will be cheaper in the end to buy good nursery trees. The nonbearing of your young trees is probably due to their youth and vigor.
Bees and Pear Blight.
A few years ago, I planted alfalfa between my pear trees and the trees bore a very heavy crop that year. Then blight made its appearance, and it was claimed that the bees carried the blight. I therefore plowed under the alfalfa and destroyed what few beehives I had. If the theory that the bees carry the blight from tree to tree is not correct, I will experiment with alfalfa again this year.
It is true that bees carry pear blight. It is also true that you are not likely to get many pears without bees to pollinate the blossoms. You cannot escape the carriage of the pear blight by removing tame bees, because wild bees are abundant in all parts of the State. The way to overcome the blight is to pursue it by amputation of diseased branches continually, so that there may be no contamination for the bees to carry. You are certainly warranted in continuing your alfalfa growing without regard to this question, using water enough to keep the alfalfa growing well without saturating the soil to the injury of the trees or inducing too much summer growth on them.
Forage Under Sprayed Trees.
Is it safe to use arsenical sprays in a pear orchard in which alfalfa is raised between the trees and afterward cut and fed to cattle?
It was fully demonstrated by experiment about 25 years ago that herbage under trees sprayed with paris green at the rate of 1 pound to 160 gallons of water was not injurious to animals pasturing upon it. We are not aware that such an experiment has been made with the more recently used arsenates - which can be used with a much higher amount of arsenic to the gallon because they do not injure the foliage - to determine whether the herbage below would be poisonous or not. Presumably not, because modern spraying does not admit as much loss from run-off as was the case with old Spraying methods.
Pears on Quince.
I saw some time ago a report of some French experiments in grafting the pear onto quince root. The report said the fruit produced was much larger than on any other root.
Most of our common pears will take readily when grafted on the quince, but the quince transforms them into dwarfed trees. Such trees do produce, with proper care, very fine fruit. The remark about their being better than on standard trees refers, however, to other climates than ours, for California grows just as large pears on standard trees as can possibly be grown, while where conditions are harder the higher culture of the dwarf tree and the protection which it requires from climatic hardships, gives the dwarf tree the advantage. You can get pears on quince roots from most of our California nurseries.
Pollination of Pears.
Is it necessary in growing the Comice pear successfully, to put some other pear near for the purpose of pollination in order to make it successful? Will the ordinary Bartlett pear do for pollination?
The Comice pear blooms with the Bartlett, and would therefore presumably be of pollinizing benefit to the Bartlett if the latter should require such treatment. Common experience in California, however, is that the Bartlett is self-fertile and not self-sterile as it is commonly reported in Eastern publications. California practice is, then, to plant Bartletts solidly without reference to preparation for pollination. Taking the matter the other way around, the Bartlett will do for pollination of the Comice probably, if that should be necessary.
Lye-Peeling Peaches.
Please give the formula for peeling peaches by dipping them in caustic soda or lye.
Lye for peeling peaches is used at the rate of half to one pound to the gallon of water, according to the strength of the lye, which you can determine by the quickness with which it acts. The lye water is kept boiling, and the fruit is dipped in wire baskets, only being allowed to remain in the lye a few seconds, and is then plunged at once into fresh water. You must be careful to keep the lye boiling hot, also either to use running water for rinsing or change it very frequently, for you have to rely on fresh water to remove the lye, or the fruit is likely to be stained.
Aged Peach Trees.
What should be done with peach trees 35 years old which are becoming unthrifty, bearing only at the ends of the limbs, etc.?
Old peach trees become bark-bound and need to be cut back to just above the crotch for the forcing out of new branches, this being facilitated, of course, by application of manure, good cultivation of the soil, use of water during the dry season, etc. The peach is, under most conditions, not a long-lived tree, and if your trees are 35 years of age, it is probable that best results could be obtained by grubbing them out and replanting with young trees on new soil if possible. The profitable life of the Eastern peach tree is put down at five or six years. In California the profitable life of the peach sometimes reaches twenty or more years, if growing under exceptionally good conditions; but 35 years would seem to be at least on the borders of decrepitude. Growing at the tips shows that you have not pruned annually to induce the growth of new wood lower down.
Renewing Peach Orchard.
Which is the best way to renew an old peach orchard? The trees are about 18 years old, Muirs and Fosters, and are yielding good crops, but some of the trees show decline. Is it best to replace the old ones with new trees or to plant a new orchard in between the old trees and cut out old ones when new trees are three or four years old?
If the trees have sound bodies and are not badly injured by sunburn borers, do none of the things you mention, but would cut back for a new head. Cutting back should be done during the latter half of the dormant period and thinning of shoots to proper balance a new head should be carefully done the following winter. It is a hard job to get young trees to start among old trees and you are apt to get a mixed lot of trees which you will not be proud of. Cut back as suggested or rip out, plow deeply and start anew, placing the rows midway between the old rows.
Will He Have Peaches?
I have a young orchard between five and six years old, mostly of the Lovell variety. I didn't have much of a crop this year. Should I have a good crop next year?
You ought to be able to tell now how full a set of fruit buds you have. If you do not know what the fruit buds are, ask some neighbor who knows peaches to point them out. If you have a good show of fruit buds, the question in California is not whether they will winter-kill or not, but whether the leaves held late enough the preceding summer and therefore the tree had strength enough to make good strong fruit buds. The late action of the leaves shows that the trees had enough autumn moisture. You will soon learn to recognize the condition also from the plumpness of the wood which carries the fruit buds. If all has gone well so far, the next point is to spray with the bordeaux mixture in November or December so that the new wood shall not be attacked by the peach blight or shothole fungus. This disease comes on early in the winter, sets the the new bark to gumming and endangers the crop. Then if you have San Jose scale, or if your trees showed much curl-leaf last spring, you ought to spray before the blossom buds show color with the lime-sulphur wash. Supposing that you have good buds now and are willing to protect them as suggested, your trees may be expected to come through with a good crop if seasonal moisture conditions are right.
Peach Fillers in Apple Orchard.
I have heard some talk against planting peach fillers in an apple orchard. What is your opinion on the subject?
There is no objection providing the peach is profitable in the locality; and that point you must look into. The peach trees will not injure the apples unless they are allowed to stand too long. In that case they would interfere with the development of the apple.
Grafting Peach on Almond.
May I expect to get good results by grafting some kind of peach to 19-year-old almond tree? If so, what kind of peach will be best? When shall I do grafting?
Peaches take to the almond all right. Cut off and graft in the branches above the main forking of the tree; leaving at least one large branch to be grafted later or to be cut out entirely if you have peach growth enough to fill the top sufficiently. Graft in any kind of peach you find to be worth growing. Graft toward the latter part of the dormant season, say when the buds are swelling for a new start.
Peaches on Apricot.
I have a three-year-old peach orchard grafted or budded on apricot roots, and interspersed through the orchard are young apricot trees, from half-inch to inch and a half in diameter, which sprang from the root, the peach bud or graft having died. I budded these over to peaches in summer, but the buds all died for some cause. What is now the best course to transform them into peach trees? If a graft, what form of graft, and approximately when should it be made?
You can graft peach scions into the apricot sprouts by taking the peach scions of the varieties you desire while the tree is perfectly dormant, keeping them in a cool place and putting in the grafts just as the buds are beginning to swell on the apricot stock. The scions can be buried in the earth in the shade of a fence or building, selecting a place, however, which is moist enough and yet where the water does not gather. The ordinary form of top grafting in stems an inch or more in diameter will work well. The half-inch stems can be whip-grafted successfully. You will have to wax well and see that the wax coating is kept sound until the growth starts.
Replanting After Root-knots.
In digging out some old peach trees, I find now and then a tree affected with root knot. I am burning the root, of course, but as these trees are scattered in the orchard, I wish to plant young trees in same locations, thus preserving the rows. Can new stock be safely put in the earth from which the old tree is removed? If treatment of the soil is essential, what is recommended?
Dig a good large hole, removing the earth, and fill with new earth from between the rows, and in this way healthy growth ought to be obtained, although there is always a disposition in some trees to put on knots. They should be looked at from time to time and all those affecting the larger stem should be removed and the wound painted with bordeaux mixture.
Buds in Bearing Trees.
In budding over some old peach trees, should I cut away the branch above the bud when the latter seems to have taken?
The sap flow to the upper part of the branch should be checked by part girdling or by part breaking or bending the top above the bud, after the bud is seen to have set or taken. Do not remove the whole top until the growth on the bud has started out well or else you will "drown it" with excessive sap flow.
Pollen Must Be of the Same Kind.
Do peaches, nectarines and apricots set fruit with the pollen of one another, and are the various peaches, nectarines and apricots self-sterile, or will most kinds set fruit with their own pollen?
We do not count upon pollination between different kinds of fruit. Most fruits are self-fertile, else we could not attain the practical results we do, because it is only in the planting of almonds, cherries, pears and apples that any regard is paid to the association of varieties for that cross-fertilization. Some fruits are more apt to be self-fertile in this State than in other States where the growing conditions are not so favorable.
Peach Budding.
Which is easier with the peach, grafting or budding?
The peach is rather a difficult tree to graft, and budding, on the other hand, is quite easy. You can bud into new shoots of this season's growth in July, and, if necessary, you can improve the slipping of the bark by irrigation a few days before budding. Buds can also be successfully placed in June in the old bark of the peach, providing it is not too old. For this select well-matured buds from the larger shoots and use rather a larger shield than in working into new shoots. When the buds are seen to have taken, the top growth beyond it can be reduced gradually and some new growth forced on the buds the same season, if the sap flow continues as it might be expected to do on young trees well cared for.
Grafting on the Peach.
Will pears do to graft on the peach, or will plums do well on the peach? How soon ought they to bear when grafted on the peach which is past three years old?
Pears cannot be grafted on peaches. Plums generally do well on the peach, and if the grafts are taken from bearing trees, should come into fruit the second season. The peach is more difficult to graft than other fruit trees, because of the drying back of the bark. Be extra careful in the waxing and be sure that the waxing remains good until the growth starts out well the following summer.
Young Trees Failing to Start.