Diseases of pear. Black crayfish: very dangerous for an apple tree, but less so for a pear. The most harmful form of this disease is damaged bark on skeletal branches and shtambah. Infection usually begins through wounds. A little dented purple-brown spot appears around these wounds, which grows in concentric zones. The plots later turn black and crack, becoming covered with small tubercles. In places of defeat the bark is similar to goose bumps The leaves, which are affected, are covered with brown-reddish spots, the flowers shrivel, turn brown, the pistils and stamens turn black. Depressed dark brown spots appear on ripening fruits. The fungus winters in the bark in the affected areas, in the mummified fruits, on fallen leaves. p>
Black cancer p>
How to fight. Fallen diseased leaves in the fall to burn, to remove from the tree the fruits that have dried. Clean the wounds with a knife from wood, at the same time grab a healthy bark for about 2 centimeters, sanitize with 1% copper sulphate, and then cover it with garden pitch. As a curative putty, you can use clay that was previously soaked in water for a day, but you should add a mullein to it in equal parts. p>
Diseases of pear. Scab:
This disease causes a parasitic fungus that affects the tissue of the leaves, fruits and green shoots. As a result, dark brown, and later black spots appear on the fruit, with a strong lesion the leaves fall, the fruits deform, lose their marketable appearance. The parsley on the leaves appears as brown spots with a velvety patina. These spots gradually grow. In addition to spots of gray-black color on the fruits, cracks are also formed. In pears with the defeat of the shoots, peeling and cracking of the bark is observed. Fungal spores after heavy rain are dispersed by the wind. Wet weather favors the development of the disease. p>
How to fight. Trees and fallen leaves should be sprayed in early spring, before bud break with 3% nitrafen to kill fungi. Spraying with a 3% Bordeaux liquid (300 g of copper sulphate in 300 g of lime per 10 l of water) also helps spraying. Then spraying is carried out with 1% Bordeaux liquid immediately after flowering and again after 18-19 days. You can also use drugs phthalan, figon, captav. During the phase of the green cone, trees can be treated with 3% Bordeaux liquid (400 grams of lime per 10 liters of water, 300 grams of copper vitriol). If you missed this period, you can do it during the flashing of buds, but already with 1% Bordeaux liquid or with chlorine dioxide (10 liters of water 40 grams), or soon (2 grams), or foundation (10 grams). If necessary, the following spraying is carried out after flowering, and then with an interval of 13-15 days with the same preparations. The leaves are burned after leaf fall in the fall. It is possible to reduce scab disease, if another raspberry is planted when planted near an apple tree, especially good if their branches are in contact.
Preventive measures: timely cleaning and burning of fallen leaves in the autumn, digging of pristvolny circles in the late autumn or early spring, pruning and burning of scab affected and dried branches in the spring before the buds swell. p>
Diseases of pear. Cytosporosis:
Causes some parts of the bark to dry. This bark does not turn black, but remains brown-red, and in the course of trying to separate it, it urinates. Quite prominent tubercles appear in the affected area of the cortex, causing pycnidis pathogens.
How to fight. Just like with black cancer. p>
Diseases of pear. Phyllocytosis: mainly affects the leaves of the apple tree. This can be seen in the form of brown spot on the leaves themselves. It appears most often in mid-June.
How to fight. Just like with scab. p>
Mealy dew p>
Diseases of pear. Mealy dew: in rare cases it affects a pear, but more often an apple tree. appears on the shoots, leaves, and sometimes on fruits and flowerspowdery white plaque, which consists of spores and mycelium. The shoots are covered with a felt bloom, the leaves dry and curl, the flowers are deformed, the ovaries fall. Mycelium overwinters in affected shoots.
How to fight. It is necessary to destroy fallen leaves, cutting out to burn diseased shoots. In the apple tree in the phase of isolation of buds, it is necessary to spray the trees with the foundation (10 grams) or sulfur preparations: sulpharide (10 liters of water 50-100 grams), segre-80 or segre-80T (80 grams). If the weather is warm and humid, it is necessary to repeat the treatment immediately after the apple trees stop blooming. p>
Fruit rot p>
Diseases of pear. Fruit rot: loves to hit pears, apples, and all stone fruit. Brown spots appear on the fruit, then grayish pads of spores and mycelium, which are arranged in concentric circles. The fruit pulp becomes brown, softened and bad taste. The fungus in the vaults causes black rot: the fruit outside becomes black-shiny, and the flesh itself becomes black-brown or brown. How to fight. In the summer, it is necessary to regularly collect and remove from the garden or bury sick fruit in the soil. p>
Milky luster p>
Diseases of pear. Milky luster: after harsh winters, it appears on trees that have suffered from frost and that have damage to the wood and bark. The leaves become whitish, with a silver tint of color, like pearl. Plots with dying tissue appear on them later. The leaves, becoming fragile, slowly dry out. The affected trunks and branches of the wood becomes a dark color.
How to fight. A good effect is given by foliar and root dressings with urea, which are combined with spraying the diseased tree with onion extract. The branches that are affected must be burned. If therapeutic measures do not help, the diseased tree will have to be uprooted. p>
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