How to deal with currant spider mites
The spider mite is a pest that parasitizes foliage and can live both on indoor plants and in the garden. The male tick reaches a length of 0.5 mm, while its female can be twice as large. These pests can be of different colors. There are white, red, green and even orange insects.
The defeat of currant bushes occurs most often from the foliage of its lower part. The main symptom of the disease is the appearance of white dots on the leaves. Whereas, over time, the tick climbs higher and higher, enveloping all the currants with its cobweb. We will talk about how to deal with this pest in this review.
Signs of damage to currants with a spider mite
It is not difficult to recognize the appearance of a spider mite on a currant. Even taking into account the fact that the pests are very small, they can cause significant damage to the currants up to their destruction. In view of the rapid reproduction, tick individuals spread throughout the plant in a short time., sucking the juices out of it and thereby deforming the structure of the foliage.
Causes of occurrence
The main reasons for the appearance of a spider mite include:
- hot and dry weather. It is these weather conditions that are considered optimal for the reproduction of pests. Although mites can outlast even cold weather for some time;
- if the soil lacks useful organic compounds or other trace elements, pests immediately use this. They immediately attack plants, weakened in some way by the lack of organic matter;
- currant bushes can become infected with spider insects from other plants in the garden. That is why it is important to localize the affected areas and try to get rid of pests as quickly as possible, preventing them from further multiplying;
- excessively dusty plants - this is also the reason for the appearance of ticks. They like this habitat. It is recommended to constantly water the currants to prevent pests.
It is worth noting that if you do not immediately eliminate all the causes of the appearance of ticks, then there will be no sense in this. Since in one day the female can lay about two hundred eggs. It is necessary to fight in a complex way, destroying not only adults, but also their eggs.
Consequences of damage to currants by a pest
If you do not get rid of the spider mite before the ovary appears, then you can not wait at all for the harvest. This pest is also terrible because it not only affects the ovaries on flowers, but also causes irreparable harm to the foliage. At the same time, the chance of the currant bush to get sick with other ailments significantly increases.
Practice shows that black currant bushes rarely get sick. But if they were struck by a spider mite and did not get rid of the pest in time. Powdery mildew attacks immediately. And already it becomes almost impossible to get rid of this problem.
How to deal with spider mites
In the process of fighting spider mites it is best to use folk methods. Firstly, it is free, since the recipes contain improvised tools or plants that can be found in any garden or personal plot. Secondly, these are safe methods for eliminating the pest. Such infusions and solutions do not harm either the plants themselves or people.
Plain water is an excellent remedy for getting rid of mites from bushes at the initial stage. This is because the pest does not tolerate high humidity. If you constantly water the bushes directly from above with water or cover them with a film after watering to significantly increase the humidity, adults will quickly die.
Whereas the use of specialized chemical compositions is recommended only in the most difficult situations when traditional methods did not give the desired result. As store drugs, getting into the pulp of currants, spoil it, harming the human body. It is possible to apply chemistry with subsequent harvesting only if the product is used before the currant begins to bloom. Otherwise, it is forbidden to eat the harvested crop.
The use of spider mite control products also depends on the temperature outside.
At an air temperature of + 21 degrees Celsius, it is advised to carry out three treatments with acaricide with an interval of 8 days. If the temperature rises to +30 degrees, the number of treatments increases up to 4 times, and the interval decreases to 5 days. Otherwise, new eggs will have time to ripen, spreading further
The use of special drugs
Acaricides can be used only before flowering appears, since hazardous substances can get into the berries and harm a person. If no one will harvest berries at all and the problem is to save the garden from a pest that spreads to other plants, sense and meaning of acaricites at any stage of development of the bush is available.
The method of application, or rather the instructions for preparing the composition, is indicated on the package. You should not make your own adjustments to the solution, it is important to follow all the manufacturer's recommendations.
Practice shows that getting rid of spider mites is not easy. And the first chemical that comes across may not help. We'll have to change the drug based on other poisons.
It is recommended to apply chemicals 3-4 times. Since the eggs of the mite show increased resistance to all drugs, including "killer chemicals".
For currants, it is recommended to pay attention to the following preparations:
Using folk methods
There are some plants that will help to cope with the pest. Some should be used dried, others fresh. Let's consider the main options:
- wormwood, dope, dandelion, yarrow, calendula, celandine;
- can be cooked a solution of finely chopped onion with garlic, diluted with water and infused for 24 hours;
- performed well in the fight against ticks infusion of potato tops.
It is recommended to use solutions by spraying them over the surface of the bush. Moreover, this must be done at least three times daily. This is because eggs are highly resistant to liquids. And to destroy them is much more difficult than mature individuals.
Now it becomes clear that it is worth starting the fight against the spider mite immediately after its appearance. This is because, in the first place, pests can be simply washed off with a stream of water or treated with an infusion of herbs. If you do not find your way in time, then after the appearance of the ovary, the tick can damage it, which means that there will be no harvest. Moreover, the pest spreads quickly through the garden and can infect all other healthy plants, even reaching indoor flowers. Everything needs to be done in a timely manner!
The spider mite is a member of the spider family. Its dimensions are from 0.25 to 0.4 mm. The body of the insect is oval. Females are gray-green in color, which changes to red-orange by the end of the season. Males have an elongated body.
The pest hibernates in the bark of shrubs and plant debris. It dies at temperatures below -28 ° C. In the spring, after warming, the females leave the shelter and move to the lower part of the leaves, and then begin to weave a thick web where they lay their eggs.
For a period of 8 - 20 days, a new generation appears. At first, it lives on weeds: nettles, swans, plantains. In the middle of summer, the pest moves to berry bushes, including currants.
A spider mite is identified by a number of signs:
- thin spider web on shoots and berries
- chiseled white spots on the leaves that become marbled and brown over time
- rolled sheet plate
- premature drying and leaf fall.
Photo of a spider mite on currants:
Description of the pest
Of the thousandth horde of the family, the class of arachnids, only a few damage the currant. The most common is a spider mite with two spots on the back. You can also find yellow and red insects. They live and move in colonies, as this is a protective measure from predators.
The first signs of tick awakening appear with the first rays of the sun and warming temperatures. In recent years, the time of appearance is early: late February - early March.
One of the main conditions for the exit from suspended animation of the parasite is a temperature of + 2 degrees. With an increase in the mode to +10, the mites completely settle down in the garden.
The development cycles of the pest have been determined. So the first invasion takes place from March to April. Cycle duration is 28 days. Then:
- 3 weeks in May, taking into account the temperature rise to + 18
- in summer 1 week at + 25- + 30
- in September 21 days with temperatures from +18
- in October 4 weeks from + 12 to +15.
Need to know! The tick loves to settle in warm and dry places. The generation and population of pests is constantly changing with frequent changes in weather conditions. During the season, up to 15 generations of parasites are replaced. Therefore, the importance of prophylaxis and treatment of shrubs during the season is especially increased.
Signs of plant damage by a spider mite
Spider mites feed on the contents of plant cells, after which some of the cells are destroyed, the area and intensity of photosynthesis decrease, the plant weakens, becomes more susceptible to any infections. The presence of this parasite is indicated by the presence of small white dots on the leaves (mainly on the lower side) and the presence of a thin cobweb that braids the plants (or parts of them). In cases of severe damage, the leaves turn white from multiple injuries. Plants are completely covered with cobwebs, a wiggling mass from the bodies of pests accumulates at the tips of shoots and leaves.
The spider mite, in addition to feeding on plants, also carries a number of infections. The literature mentions that this parasite carries gray mold spores and viral infections of ornamental and agricultural crops.
How to deal with currant spider mites using agrotechnical methods
Agrotechnical control methods help to avoid the use of chemicals. However, they can also greatly harm the shrub if the processing technology is not followed.
It is more convenient to irrigate the bushes with hot water and other preparations from specially designed devices.
In order not to start a spider mite on black currants, fire is chosen as a measure of struggle. The method is also effective for red-fruited and white-fruited varieties, but care must be taken. First, they perform sanitary pruning of the bush. Branches with visible damage are removed. Fire a blowtorch or gas torch. By directing the flame of fire to the branch from a distance of about 15 cm, they quickly move from top to bottom. You can't stay in one place for a long time. You can burn the fruit buds, bark and the shoot itself. It will not be possible to destroy all the ticks with fire, but in the spring their activity will be weak.
Pouring boiling water over the bushes is considered a more gentle method. Processing is carried out in early spring before the appearance of buds and in late autumn after the foliage has fallen. The water is heated to a temperature of 70-90 ° C. The currant bush is tied with twine as tightly as possible. Hot water is supplied from a watering can or sprayer. They try to pour over all the currant branches. Boiling water kills hibernating mites, improves the shrub's immunity to powdery mildew.
Spider mite on currants
This type of mite is the most common pest that parasitizes almost many plants. Spider mites are arachnids, have 4 pairs of legs, small size (0.3-0.6 mm). Larvae and adults feed on the cell sap of leaves and young shoots. As a result of their activity, some of the cells die, the intensity of photosynthesis decreases, the plant weakens and is less able to resist infections.
Spider mites live on the underside of leaves in colonies numbering several hundred individuals. Their color is different (red, brown, yellowish-green, orange) and depends on various factors. Their wintering takes place under leaf litter or in the upper layers of the soil. In the spring, when the buds dissolve, the mites move to the plants. The first generation of insects can parasitize on weeds, and from them they will already migrate to cultivated plants. Affected bushes do not tolerate winter well and lose productivity. The life cycle of a tick, depending on the conditions of humidity and temperature, is 12-23 days (optimal for their rapid development is + 27-30 ° C with a low (less than 60%) air humidity). Females lay several hundred eggs during their life, which mature in 3 days. Spider mites are also carriers of various infections, both viral and fungal etiology.
Spider mite prevention
- For the prevention of any pest and disease, the main thing is to regularly and carefully examine the home plant. Early detection is the key to a successful fight.
- Since the tick loves warm and dry air, it is necessary to create unfavorable conditions for it.
- Regular spraying or washing of the leaves of indoor plants, especially in dry and hot weather (every day in summer), prevents the appearance and development of the pest.
- Rinse your houseplants with a hot shower every 3-4 weeks. We wrote above how to do this better. This is especially important if the indoor flower has already affected the spider mite.
- Place a new houseplant for 2-3 weeks separately from others to avoid contamination of the entire home collection (quarantine).
The medical ultraviolet lamp helps very well: monthly irradiation of the plant for about 2 minutes strengthens the immune system.
ADDITION TO THE ARTICLE:
I would like to believe that now you can effectively fight spider mites on indoor plants with the help of drugs or folk remedies.
And most importantly, you can get rid of them for a long time and save all the flowers!