Woodworm odorous: photos and ways to fight

Woodworm odorous - a serious pest. Insect spoils ornamental and fruit trees. Its characteristic feature is a strong smell of wood alcohol, which can be felt up to a distance of 10 m. This smell is the secretions that protrude from the glands on the jaws of the pest. Because of the smell of an insect and called odorous.

Life cycle

Caterpillar duckweed smells distinctly bright color and large enough. That she turned into an adult insect, she needs 2 years. During this time, the caterpillar passes through several stages of development, having turned from an egg into an adult, having been still a larva and a pupa.

The eggs of the insect have an elongated shape and a size of about 1.5 mm. Within 10-15 days, pink-red larvae appear from light brown eggs with dark stripes. Their length is 8-10 cm.

The larvae hibernate in groups - after exiting the egg they bite into the bark and stay there until the spring. Usually it is a group of 15-30 individuals, but this ends their collective life, and then they live alone.

The transformation into a butterfly

As the larvae grow up, their color changes: they become reddish-brown, and the back - brownish-red. Adult caterpillars have jaws, and they are strong enough - they can easily bite the finger of a person who will take them in hand.

The next stage is pupation. Before turning into a doll, the caterpillar moves to the closed places. It can be:

1. The soil is at the foot of the trees.
2. Trumpet stumps.
3. Progryzennye moves in healthy plants.

After 15-45 days the process of transformation will be completed, and the pupa will become a butterfly. This can be observed in the third year after the eggs were laid. This happens in the spring, and after 2-4 months the butterfly is ready to take care of the continuation of the genus. One female can lay down to a thousand eggs. But she does not do it in one place, but in different crevices, which she finds in the bark of trees. The female lays a laid egg with a dark liquid that quickly thickens. In each masonry there can be from 10 to 200 eggs, and almost out of each hatched future woody odor. Caterpillar and butterfly are stages of development of the insect, during which it is most dangerous for plants.

Damage caused by woodworm

There is a woodworm odorous wherever poplar, birch, maple, willow and other trees with softwood grow. Suffer from the insect and fruit trees: in addition to apple trees, pears, plums, cherries, insects damage walnut, olives.

Usually the pest settles on weakened or lonely growing trees. Damaged plants after such tenants weaken, they are easily affected by fungal and bacterial diseases.

Because of the gnawed passages, young shoots wither in large quantities, leaves fall from them. This is the reason that the harvest on fruit is sharply reduced, and ornamental plants become unattractive. Weak trees lag behind in growth, they can wither and die. Here are the consequences of what will happen to the plants, if not to fight with such a pest as a stubborn cherubic. Photos better than any words will help to understand how serious this "passenger".

Pest Detection

The following signs will tell you about the fact that the arborescent woodworm has settled on the plants:

1. Presence of trunks on the trunks. They are wide enough and have an oval shape.
2. The appearance of drilling flour. These are small sawdust, which are poured out from the puffy courses. If the bark is damaged, the sawdust will be brown, and if the damage is deeper, the color will be yellowish.
3. Drying or lag of the bark from the trunk.
4. The flow out of the holes in the tree of the brown liquid mixed with the excrement of the pest. And the liquid will have a sharp smell.
5. When one tree is settled, the caterpillars crawl to the neighboring plant. During this period, they can be seen on the surface of the soil.

Pest Control

The most effective way to fight a pest is to remove or destroy the larvae at a time when they do not leave the tree bark. To do this, apply mechanical, chemical or biological methods. On the features of each of them - further:

1. Mechanical destruction is the collection of larvae in those parts of plants where the cortex lagged behind the trunk or even died away. To do this, you have to do all the work manually, as no tools can be used to avoid damaging the wood. The only thing you can do is wear gloves. After the completion of the work, the collected larvae must be burned together with the purified bark. Detect damage on the tree with a garden spray.
2. Chemical way. Provides for the use of organophosphate insecticides. It can be "Chlorpyrifos", "Chlorophos" and others. Any of the preparations should be wetted with a ball of cotton wool, and then find the move that the caterpillars have done, and put the wadding inside. A more simplified version is to introduce an insecticide into the drills with a syringe or syringe.
3. The biological method works best if there is an odorous woodworm in the garden. Measures to combat this case consist of attracting birds to the garden. Of course, only those that feed on insects - magpies, woodpeckers, rooks, tits and many other representatives of birds are eager to eat pests, including caterpillars of fragrant woodworm. In order for the birds to settle in the garden, it is necessary to think about this from the fall - to hang up artificial nests, houses, feeders.

Preventive measures

In order to prevent odorous woodchucks from appearing in the garden area, it is best to carry out preventive measures. They consist of regular cleansing of the trees from moss and cracked bark. To save trees, you need to lubricate the barrel by using any of the following mixtures:

1. Mix clay (2 parts) with lime (1 part).
2. Prepare a remedy for insecticide, glue and clay. To do this, dilute the clay in a bucket with water so that it resembles sour cream. Then add 10% "Carbofos" and 250 g of carpenter or casein glue. If the trees are young and the bark on them is very thin, do not add glue.

Use the selected mixture on days when there is no rain. Frequency of application - twice a season: in the spring, when the snow cover still lies, and in the fall, after the fall of the fall. To blend the mixture not only with the tree trunk, but also with the base of the branches. The height of the coating is 2 m and more.