Pear leaves quite often change their color, curl, and also fade or dry as a result of illness or care errors. Nevertheless, competent treatment of horticultural culture should always begin with the correct determination of the damaging factor or the root cause of such pathological changes.
Why leaves change color
Beginning amateur gardeners are often worried about why the foliage of the pear turns yellow or the leaves on the plant become pale or orange, and also turned red or darkened. If in autumn the reddening and yellowing of foliage is a natural process caused by a sharp decrease in temperature, then the leaves on pear trees turn yellow and red in spring and summer, not all domestic gardeners know.
The opinion of experts in this matter is unanimous, and involves the impact on the garden culture of several basic, most common reasons:
- yellow leaves are often the result of insufficient amounts of potassium in the soil, and if the fruit crop is able to cope with such an imbalance in the early spring, then in the summer processes accompanied by yellowing begin;
- if the pear leaves turned yellow in a fairly short time, then you should think about such a complex plant disease as chlorosis;
- red leaflets often indicate a deficiency of phosphorus in the soil, which is accompanied by redness from the petiole;
- reddening of the foliage can also be caused by excessive soil moisture, which blocks air access to the root system;
- the incompatibility of the stock and scion is considered to be an equally common cause of the formation of red leaves on a pear tree, which is often also accompanied by the characteristic formation of sagging in the area of intergrowth;
- yellowing is also observed with non-compliance with the regime of irrigation measures, including both an oversupply and a lack of watering;
- the general lack of nutrients in the soil is also very dangerous, and in this case the leaves darken, becoming almost black;
- lack of nitrogen-phosphorus complexes causes blanching of leaves.
As practice shows, most often there is an insufficient amount in the soil of not one, but several nutrients at once, so all the signs of deficiency can be combined. At the first manifestations need to balance plant nutrition, as well as check the height of the groundwater and, if necessary, transplant to the most suitable site with the implementation of high-quality drainage. In addition, any change in staining of foliage can also be caused by a garden culture disease resulting from a lesion by pathogenic microflora.
Pear Disease: Rust
Why do leaves change shape
Leaves on pear trees twist and curl when the fruit plant is damaged by diseases or by sucking-gnawing plant parasites. At the same time, quite often small and red spots that are not characteristic of a healthy plant are observed on the foliage.
If the leaves on the plant are twisted, then it is necessary to carefully examine the fruit plantations for the detection of a damaging factor, which can act as fungal, viral and bacterial infections, as well as insect pests. From the fact how correctly the reason for changing the shape of the leaves is determined, the further treatment regimen and the choice of drugs for treatment will depend.
Pear Disease and Treatment
As a rule, all viral and fungal infections are able to infect plants belonging to the same group of garden crops; therefore, they easily reproduce and are transferred between trees. Identification of the damaging factor on one tree should be the reason for the preventive treatment of all pome and stone fruit garden crops.
|Damaging factor||Signs of defeat||Therapeutic measures|
|Fungal scab disease||Brown spots, shrinkage and premature leaf fall||Early spring treatment with “Horus”, diluted from the calculation of the ampoule per bucket of water or “Oksikh”, divorced from the calculation of a pair of tablets per bucket of water|
|Powdery mildew||The formation of a dirty white powdery coating and small black dots, yellowing and drying of the leaves, stopping shoots in growth, lack of ovaries||In spring, spray with a “Topaz” on a green cone, diluted at the rate of an ampoule per bucket of water|
|Soot fungus||Starting from the second half of summer, a black coating appears on the foliage, which resembles furnace black||The growth and reproduction of a fungal infection can be suppressed by the treatment with the insecticide "Calypso" and the sparing fungicide "Fitoverm"|
|Rust of pome crops||Characteristic light, almost yellow spots appear on the foliage, which eventually acquire a pronounced dark orange stain||Treatment of wood and soil in the near-stem circle with a solution of urea diluted at a rate of 0.6-0.7 kg per bucket of water or with systemic fungicide Bayleton|
|Bacterial burn||Foliage curls and blackens quickly enough, but does not crumble, after which shoots and bark die off||Multiple processing of fruit stands at all stages of vegetation with Bordeaux mixture|
|White spotting||The appearance in late May or early June on the leaves of numerous grayish spots with dark brown bordering||Spraying the tree at the green cone stage or at the stage of bud extension, 1% solution of Bordeaux fluid|
|Mosaic Pear Ring||The appearance of pale green or whitish rings or curved stripes is observed on the foliage.||Quarantine measures should be observed and the prevention of culture damage by disease pests|
Pear Pests and Ways to Combat
Regular inspections of fruiting plants minimize the risk of pear damage by pests and contribute to an earlier determination of the damaging factor.. Thus, it is possible to begin the fight against plant parasites as early as possible, which increases the effectiveness of the therapeutic measures.
|Damaging factor||Signs of defeat||Therapeutic measures|
|Pear Gall Mite||The foliage acquires a light brown color, after which it turns black, dries and falls||Spraying with a solution of colloidal sulfur, diluted in a ratio of 100 g per bucket of water or "Tedione" at the stage of bud dissolution|
|Pear itch||Leaflets curl, dry and fall|
|Pear Gallic||Foliage becomes brittle, turns yellow and twists along the edges up.||In the spring, treatment with drugs such as Antio, Gardona, Dursban, Zolo or a solution based on Karbofos, Metathion, Metaphos, Nexion, Phosphamide or Chlorophos|
|Pear Pipeline||Pear leaves curl, dry out and fall prematurely|
|Aphid||Damaged leaves and the apical part of the shoots curl, after which it dries out||After the buds open, Antio, Decis, Karbofos, Metaphos, Wofatox, Trichlorol or Cyanox are treated|
|Pear Thorns||Causes very characteristic shredding of fruit tree leaves||Early spring treatment of the tree crown with Oleuprit, Nitrafen or Karbofos, diluted from the standard calculation of 90 g per bucket of water, or Kemifos, diluted at the rate of 10 ml per bucket of water|
Pests and diseases are constant companions of any garden plantings. Both beginners and experienced gardeners are not immune from their appearance, therefore, the entire volume of preventive measures plays a paramount role in the protection of fruit crops.
Diseases of pear trees can cause many problems to amateur gardeners, and very often cause partial or complete loss of yield, and in some cases the death of fruit stands. Carrying out the correct and timely treatment and a full range of preventive measures help to protect the fruit plant, as well as restore fruiting in the shortest possible time.
Pears: treatment methods
During the vegetative period, any fruit trees are strictly forbidden to be subjected to pesticide treatment. This rule is due to the risk of damage to the flowers by burns and the death of pollinating insects. For these reasons, it is very important to inspect all fruit plantings in advance in order to timely identify harmful insects and diseases, in order to have time to plan treatment methods and effectively deal with any damaging factors.