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Home Vegetable Gardeningthe trouble by spraying after the calyx closes on the growing fruit.Keep close watch and spray immediately upon the fall of the blossoms, and repeat the spraying a week or so (not more than two) later. For spray use Paris green at the rate of 1 lb., or arsenate of lead (paste or powder, less of the latter: see accompanying directions) at the rate of 4 lbs. to 100 gallons of water, being careful to have a thorough mixture. During July, tie strips of burlap or old bags around the trunks, and every week or so destroy all caterpillars caught in these traps. The tent-caterpillar may be destroyed while in the egg state, as these are plainly visible around the smaller twigs in circular, brownish masses. (See illustration.) Upon hatching, also, the nests are obtrusively visible and may be wiped out with a swab of old bag, or burned with a kerosene torch. Be sure to apply this treatment before the caterpillar begins to leave the nest. The treatment recommended for codlin-moths is also effective for the tent-caterpillar. The canker-worm is another leaf-feeding enemy, and can be taken care of by the Paris green or arsenate spray. The railroad-worm, a small white maggot which eats a small path in all directions through the ripening fruit, cannot be reached by spraying, as he starts life inside the fruit; but where good clean tillage is practiced and no fallen fruit is left to lie and decay under the trees, he is not apt to give much trouble. The borer's presence is indicated by the dead, withered appearance of the bark, beneath which he is at work, and also by small amounts of sawdust where he entered. Dig him out with a sharp pocket-knife, or kill him inside with a piece of wire. The most troublesome disease of the apple, especially in wet seasons, is the apple-scab, which disfigures the fruit, both in size and in appearance, as it causes blotches and distortions. Spray with Bordeaux mixture, 5-5-50, or 3-3-50 (see formulas below) three times: just before the blossoms open, just as they fall, and ten days to two weeks after they fall. The second spraying is considered the most important. The San Jose scale is of course really an insect, though in appearance it seems a disease. It is much more injurious than the untrained fruit grower would suppose, because indirectly so. It is very tiny, being round in outline, with a raised center, and only the size of a small pinhead. Where it has once obtained a good hold it multiplies very rapidly, makes a scaly formation or crust on the branches, and causes small red-edged spots on the fruit (see illustration). For trees once infested, spray thoroughly both in fall, after the leaves drop, and again in spring, _before_ growth begins. Use lime-sulphur wash, or miscible oil, one part to ten of water, thoroughly mixed. CHERRY ENEMIES Sour cherries are more easily grown than the sweet varieties, and are less subject to the attacks of fruit enemies. Sweet cherries are troubled by the curculio, or fruit-worm, which attacks also peaches and plums. Cherries and plums may be sprayed, when most of the blossoms are off, with a strong arsenate of lead solution, 5 to 8 lbs. to 100 gals. water. In addition to this treatment, where the worms have once got a start, the beetles may be destroyed by spreading a sheet around and beneath the tree, and every day or so shaking or jarring them off into it, as described below. PEACH ENEMIES Do not spray peaches. For the curculio, within a few days after the flowers are off, take a large sheet of some cheap material to use as a catcher. For large orchards there is a contrivance of this sort, mounted on a wheelbarrow frame, but for the home orchard a couple of sheets laid upon the ground, or one with a slit from one side to the center, will answer. If four short, sharp-pointed stakes are fastened to the corners, and three or four stout hooks and eyes are placed to reunite the slit after the sheet is placed about the tree, the work can be more thoroughly done, especially on uneven ground. After the sheet is placed, with a stout club or mallet, padded with a heavy sack or something similar to prevent injury to the bark, give a few sharp blows, well up from the ground. This work should be done on a cloudy day, or early in the morning--the colder the better--as the beetles are then inactive. If a considerable number of beetles are caught the operation should be repeated every two or three days. Continue until the beetles disappear. Peaches are troubled also by borers, in this case indicated by masses of gum, usually about the crown. Dig out or kill with a wire, as in the case of the apple-borer. Look over the trees for borers every spring, or better, every spring and fall. Another peach enemy is the "yellows," indicated by premature ripening of the fruit and the formation of stunted leaf tufts, of a light yellow color. This disease is contagious and has frequently worked havoc in whole sections. Owing to the work of the Agricultural Department and the various State organizations it is now held in check. The only remedy is to cut and burn the trees and replant, in the same places if desired, as, the disease does not seem to be carried by the soil. PEAR ENEMIES Pears are sometimes affected with a scab similar to the apple-scab, and this is combated by the same treatment--three sprayings with Bordeaux. A blight which causes the leaves suddenly to turn black and die and also kills some small branches and produces sores or wounds on large branches and trunk, offers another difficulty. Cut out and burn all affected branches and scrape out all sores. Disinfect all sores with Next Page |
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