The pear turns black, why pear leaves turn black, useful tips

Quite often, one can hear a complaint from novice gardeners that the leaves on the pear are turning black. There may be several reasons for this phenomenon, in order to choose a treatment option for this ailment, you should carefully study how the process of changing the color of the leaves occurs - this will help determine which negative factors (diseases, pests, weather conditions or lack of trace elements in the soil) caused the observed phenomenon.

Why leaves turn black - the lack of which microelements can cause this phenomenon

It will be difficult for an inexperienced gardener to determine the cause of the blackening of the leaves. Therefore, it will not be superfluous to study useful tips from experienced gardeners. A change in the color of the edges of the leaves, and later on the tops of young shoots, may indicate a lack of calcium; in this case, adding calcium nitrate to the soil will be a sufficient measure.

If pears are grown in the southern regions, then a similar picture can be observed when a tree is damaged by bacteriosis, as a treatment, it will be necessary to spray the affected plant with fungicides, such as Strobi, Skor and similar preparations.

If, with the blackening of the leaves, the formation of rosettes of leaves at the tips of the branches and the drying of the top of the tree, growth inhibition is observed, then most likely the pear is experiencing boron starvation.

With a lack of iron, blackening of the foliage is not observed, on the contrary, it becomes unnaturally light, acquires a straw-yellow hue. An insufficient amount of copper causes the foliage and young shoots to wilt.

An effective means of combating such ailments will be spraying the tree with solutions containing trace elements and fertilizers: iron or copper sulfate, boric acid, etc.

Bacterial infection - what is this disease and how to deal with it

Sometimes this disease is also called a bacterial burn, it most often affects fruit trees, in particular, a pear. The first symptoms of the disease usually appear in June, they are expressed in the blackening of the leaves, it starts from the central part. Young shoots can also change color to brown, and then blacken, their appearance becomes as if fire had passed through them.

The cause of the disease is an infection that has got through cracks in the bark or stomata of the leaves. Penetration can also occur when pruning branches with a non-sterile tool. Moving along the trunk along with the juice, the bacteria infect the entire plant. The active development of bacteria in the tissues of the tree causes their rapid death.

Saving a pear in this case will not be an easy process, but you can still try. Effective drugs will be antibiotics, such as penicillin, thiomycin, agrimycin. They are bred in water and sprayed throughout the plant. The first spraying is done when the pear blossoms, the subsequent ones are performed with five-day breaks.

Some experienced gardeners claim that you can also get rid of a bacterial burn by spraying all the plants in the garden with a solution of copper sulfate in milk of lime. Before proceeding with the treatment of plants, you should make sure that the resulting solution has a neutral reaction - an excessive amount of copper sulfate can damage the leaves of plants, with an excess amount of lime, the effectiveness of treatment with a solution will decrease.

To prevent infection of pears during the processing of the garden, all tools that are used for gardening should be disinfected. It is not sad, but if the treatment with the recommended drugs did not give the desired effect, the tree will have to be removed from the site and burned.

Pear scab - we are taking measures to save the tree

Considering the question of why pear leaves turn black, one cannot help but recall such a common disease as scab. The origin of this disease is fungal, it occurs quite often and, in addition to leaves, affects shoots, flowers and fruits. The blackening of the leaves over time causes them to die off and they fall off. Thickened plantings of trees threaten the rapid spread of scab from one tree to another. Scab should be dealt with seriously - it has a negative impact on the state of the tree itself, leading to a decrease in its yield.

Wet weather, which persists for a long period, activates the growth of scab spots. The black spots that appear on the sheets grow rapidly. Among the factors influencing the activity of the spread of the disease, experts call:

• weather,
• variety resistance to fungal infections,
• tree age.

With an advanced disease, part of the crop is lost altogether, the surviving fruits have poor taste, are hard and have spots on the peel.

The scab pathogen overwinters on young shoots of trees, causing the appearance of swollen areas and wound surfaces at the locations of the pathogenic fungus. The defeat of the fruit is accompanied by the appearance on their surface of black-olive spots, which can merge into a single whole. Prolonged exposure to infection leads to the fact that it acquires a corky texture, stops growing, and cracks.

The fungus Dothideales causes pear scab; it can live exclusively on a pear. Among the varieties resistant to damage by this fungus are: Klapp's Favorite, Exhibition, Gurzufskaya, Victoria, Dessert, Strawberry, Smuglyanka.

More prone to scab disease: Favorite Yakovleva, Marianna, Phelps, Forest Beauty. Naturally, special attention will need to be paid to the protection of such varieties.

To help prevent a scab epidemic:

• correct site selection
• competent pruning of trees in the autumn-spring period,
• removal of shoots, leaves and fruits on which signs of scab damage were seen.

Of great importance are the preventive treatments of trees, they must be carried out repeatedly, in accordance with the recommendations for the use of certain chemicals. For example, in an area with an excessively humid climate during bud break, the crown will need to be treated with a 3% Bordeaux mixture solution, then, in the budding phase, with Topaz or Horus preparations. The same preparations should be applied after the end of flowering.

Antibiotics are used to treat scab pears, solutions are prepared according to the instructions. Pear treatment should be accompanied by preventive measures:

• cleaning and disposal of fallen leaves and fruits, on which spores of the scab fungus that can infect new trees remain,
• since the fungus can exist even on the ground in the root zone of the tree, the area around the trunk should also be treated with chemicals.

Copperhead

This small brown-black winged insect can easily jump and fly from branch to branch or from one tree to another. In order to soak, the larvae and adult suckers suck the juices from the leaves and shoots. Exhaustion of a tree in the event of an attack by a large number of insects leads to the death of flowers, the fall of the ovary, and a decrease in the size of the leaves. The larvae of the sucker in the course of their life activity secrete sticky dew, which sticks together the inside of the buds and peduncles that have not yet blossomed, young leaves on the shoots. Sticky honey secretions contribute to the development of black sooty fungi on them.

If, due to the defeat of the sucker, the leaves on the pear turn black, do not hesitate for a long time about what to do:
before bud break, treat the tree with hot water, its temperature should be within +60 C,
in the period between bud opening and flowering, the crown will need to be treated with a solution of karbofos. Folk recipes for getting rid of suckers recommend spraying with infusions of tansy, garlic, onion peel with the addition of wood ash during the growing season.

With a significant increase in adult insects on a pear, the tree should be treated with a solution of trichlormetaphos.

Leaves on a pear turn black from dry air - how to treat a tree

With insufficient air humidity for a long period, darkening of pear leaves can be observed even in those trees that receive moisture through systematic watering. The presence of a large number of dust particles in the dry air has a negative effect on the leaves. The varieties of pears recommended for cultivation in the southern regions suffer the most from this variety. An effective measure to combat this kind of problem can be the use of irrigation according to the principle of "spraying on the leaf"

Aphids can cause blackening of leaves on a pear

Of course, such a picture will be observed with the invasion of a large number of aphids.

The most effective method of dealing with these harmful insects will be spraying the pear with special chemicals from aphids at the recommended time.