Web on an apple tree: causes and remedies
Fruit crops in the garden, including the apple tree, suffer from insect pest attacks. The presence of some can be detected by characteristic features such as cobwebs. There are several types of pests that leave the web, so it is important to identify the insect in time, which will facilitate further fight against it.
Major pests
Such a garden culture as an apple tree. has decorative qualities, in the light of which it is able to decorate and ennoble any adjacent territory, garden or cottage, but it also brings tasty and healthy fruits to the owners. However, such a harmless at first glance thing can spoil the appearance and cause serious harm to the plant - a web that many gardeners, due to inexperience or for other reasons, consider harmless.
In fact, spider webs can be present in small numbers on trees thanks to insects such as spiders. But there is a more serious reason for its appearance on plants - this is the reproduction and development of insect pests of horticultural crops on the apple tree, which can cause serious harm to the crop and the apple tree as a whole.
It is quite possible even for an inexperienced summer resident or gardener to distinguish the spider's web from the one that covers the tree during the invasion of pests. In the first case, the nets will be thin and almost invisible, but a dense and white web will indicate the presence of dangerous insects. Among the large number of pests that leave cobwebs on plants, including the apple tree, it is worth highlighting the most common:
- apple spider mite;
- apple moth;
- spider aphid;
- hawthorn and copperhead;
- unpaired and ringed silkworm;
- winter moth;
- ermine moth.
Such a pest as a tick is a very small insect, so it is very problematic to establish its presence on a tree with the naked eye. As a rule, the size of adult ticks reaches only 0.5 millimeters, but pests grow and breed rapidly, so the period from laying an egg by a female to the appearance of an adult insect can be no more than 5-7 days. Despite its small size, the pest is quite dangerous for the apple tree, since it feeds not only on leaves, but also on shoots and fruits. The insect sucks the juice from the plant, so the slightest delay in the fight against it will be fraught with the loss of at least half of the crop.
The apple moth is able to form a very dense mesh on plants, using it to replenish the colony of pests with new insects, the larvae also feed on plant juices, therefore, together with the adult moth, they harm the culture. Caterpillars appear in all orchards without reference to any climate or region, so it is important to process and inspect the apple tree for the presence of such pests.
The appearance of the spider aphid, as a rule, coincides in time with the development and reproduction of the spider mite on the apple tree. The increase in the number of pests is even faster - usually one female insect lays about a hundred eggs at a time.
However, a web on a horticultural crop can occur not only in spring or summer, it is quite common to find it on an apple tree in winter. This is a sign that hawthorn has settled on the plant. Caterpillars of this species do not stand out for a long time, they usually form cocoons and winter on a tree, and with the advent of the first warm days they begin to destroy the plant and lay eggs.
As for the sucker, this insect has wings, thanks to which it is able to appear and begin to multiply anywhere. Such a pest is characterized by the appearance of a large web in the branches, it will have a white color and good density. The larvae of the sucker feed on apple juices, which they suck out from the buds, leaves, fruits and flowers of the crop, thereby causing great harm to the apple tree.
In addition, the insect emits rather specific and very sticky decay products that are able to connect flower petals, foliage and buds together. As a result, mushrooms form in them, resembling a web of cobwebs.
Gray caterpillars in the web, having hairs on the body - this is a gypsy moth. The spread of the pest occurs naturally - with the help of gusts of wind, which carries insects to different plants, where they begin to destroy the crop and actively multiply.
If a web appeared on the plant, and black caterpillars with stripes are visually distinguishable in it, it can be unequivocally stated that the culture is affected by such a pest as the ringed silkworm. Insects are inactive during the daytime, but at night they actively eat the culture.
Green caterpillars with light stripes represent the winter moth.In the spring, they are able to go deep into the buds of the plant, destroying them from the inside, after which they move on to the green mass of the plant.
You can identify the ermine moth on a horticultural crop by a large white web with black patches, which can envelop the entire crown. This is what a pest lair looks like. When an individual is reborn into a butterfly, it lays eggs in inaccessible areas of the plant, and the caterpillars themselves can hibernate under them. And in the spring, individuals actively feed on the green mass of the plant. As a result of this destruction, the leaves die off and curl into a tube, forming an ideal place for a spider web tent.
There are cases when the gardener did not pay due attention to caring for a plant in the garden, and in such a web about a hundred caterpillars fit at once, which after a short time will turn into butterflies and begin to lay eggs.
How to deal with the problem?
Pest control measures consist in the use of various synthetic and natural poisons, which, when properly used, do not harm humans and animals, but have a detrimental effect on insects. Usually, gardeners perform tree spraying work several times during the season - in early spring, summer (June) and autumn. But the frequency of spraying can vary depending on the damage to crops by insects and be not only preventive, but also emergency. To get rid of the web and the pests that form it, no special skills and abilities are required, therefore, even an inexperienced gardener can handle the processing of crops with specialized store preparations and home-made formulations.
Today, there are several highly effective pest control methods, one of which is the mechanical processing of horticultural crops. The essence of the work is to remove damaged foliage in the spring, which, even in a young state, changed its color to brown. In the phase of the appearance of caterpillars, forming a web on the leaves and branches of the apple tree, it is removed from the branches manually.
Experienced gardeners recommend carrying out such work in the morning, since at this time the pests will also be on their web, which will allow them to be simultaneously collected and destroyed along with nets and larvae. Everything collected from the trees must be promptly destroyed, the best way to do this is to burn the cobwebs and pests.
Chemical Methods
If a large number of insect pests are found on a horticultural crop, it should be treated with synthetic preparations. Among the list of products that are sold in garden stores, it is worth dwelling in detail on the most popular among gardeners and gardeners.
- "Bitoxibaccillin". The composition demonstrates high efficiency in the fight against apple moth, aphids and mites. Also, the tool is purchased for the destruction of moths and leafworms. The product is sold in a concentrated form, so before spraying it must be diluted with water according to the proportions indicated in the instructions. The frequency of spraying directly depends on the source of infection of the crop, but on average, two treatments with an interval of a week are enough.
- "Bicol". The composition has proven itself in the destruction of caterpillars and lepidoptera insects that weave webs on horticultural crops.However, such chemistry can only be used in the vegetation phase of the apple tree, adhering to the instructions for use in the work.
- "Endobacterin". The substances that make up the preparation are able to cope with almost all insects that harm plants in the garden, especially those that leave cobwebs on plants. Before use, the composition requires dilution in water.
- "Verticillin". This chemical is produced on the basis of fungal spores, which are able to penetrate the tissues of insects, exterminating them from the inside. Before use, the product is soaked in liquid, which promotes the growth of fungi. Fruit plantations are plentifully watered before spraying.
- "Dendrabacillin". Granular preparation for insect control, which does not pose a danger to humans and animals. The composition is dissolved in water, after which they process crops in the flowering phase. But the tool has limitations regarding the frequency of use - during the year they can spray plants no more than twice with an interval between treatments of about one week.
Folk remedies
If it is not possible or desirable to use synthetic store-bought poisons, you can use no less effective compounds that you can prepare yourself to kill insect pests. Among the folk means of struggle, the following can be distinguished.
- Soap solution with wood ash. The product is non-toxic, as it is prepared from dissolved laundry soap and ash. The first ingredient of the drug will allow the composition to linger on the plant after spraying, forming a film on the green mass and branches. Insects will not be able to cope with the frozen composition, in addition, the product will affect the taste of greens, which will scare away insects.
- Composition based on shag. Poison is prepared according to the following recipe: 1 kilogram of the substance must be poured with a bucket of water and boiled for 5-10 minutes. After that, the solution must be infused for three days at room temperature. After filtering, the product is diluted with two buckets of water and horticultural crops are processed.
- Nettle infusion. Grass should be filled with water at room temperature, then strain and spray diseased plants.
- Onion skin remedy. To prepare it, you need to take the onion and the husk and add a bucket of warm water to them. The composition is left to infuse for a week, after this time the product must be filtered and used for its intended purpose. The drug will be suitable for use for another six months, but for the treatment of crops in the garden it can be used no more than three times per season. The folk remedy demonstrates high efficiency in the destruction of aphids and mites.
In addition to the above methods of getting rid of insects and cobwebs, a biological method is also used. It consists in attracting natural enemies of pests to a plot with fruit plantations. These include feathered and beneficial insects, therefore it is important to maintain the natural biobalance in the garden. Ageniaspis, which lays its eggs in caterpillars, can reduce the number of pests, and the latter die from this.
Along with this, a drug such as Entobacterin can be used to assist in pest control and for preventive purposes. It contains bacteria that are absolutely safe for humans and animals, which lead to the death of aphids, mites and other pests, including caterpillars on an apple tree. Processing with such a composition is usually carried out several times in the vegetative phase of the plants.
Preventive measures
In the issue of combating the web and the pests that form it on the apple tree, an important point is to prevent the occurrence of such infections of horticultural crops. As a preventive measure, you should use the recommendations proposed below.
- Weeding and removing weeds on the site and in the near-trunk circle will make it possible to exclude the invasion of many pests, as well as contribute to the destruction of larvae that may be in the ground.
- Cultivation of cruciferous crops near apple trees should be abandoned. But planting greens or cumin nearby will attract ladybugs that can destroy aphids.
- Feeding fruit plantations will help eliminate insect attacks. It is important to apply root fertilizers regularly so that the soil is enriched with phosphorus, copper and zinc.
- It is important to regularly prune and form the crown of the crop. It is best to do this work before the start of the growing season. Insect pests are most often found in old branches, so they must be cut down in a timely manner.
- Regular inspection of trees will help to detect wounds on the trunk or branches in time, which should be disinfected and healed with garden pitch. Young branches require special attention. If cones from insect eggs are found on the branches, they must be cleaned and destroyed.
- Whitewashing tree trunks with chalk or lime mortar will act as a preventive measure.
For information on how to effectively deal with aphids on an apple tree, see the following video.