One of the pests of currant bushes is a fairly common kidney mite. It is difficult to fight him, just like with another glass pest. Many gardeners have long come to terms with his presence and believe that it is impossible to destroy this pest.
This opinion is misleading. It is quite possible to reduce the presence of mites to a minimum and even completely get rid of the pest. Tick control methods are to prevent and treat currant bushes with and without chemicals.
Currant kidney mite
This pest is very common, it can be found in almost all summer cottages. Its main habitats are the middle zone of Russia. However, very few people can see it due to its small size. The kidney mite settles in the kidneys of the currant between the scales, in the kidney it multiplies, and feeds on the juice of the currant. It is difficult to see with the naked eye due to its microscopic size.
Tick saliva has a destructive effect on the currant bud. From it, the kidney swells, the process of loosening it begins, and it increases greatly in size, practically becoming similar to a ball. Many generations of pests live inside one bud. When it becomes cramped for them, young individuals move to other currant buds. Thus, the mite actively spreads, destroying more and more buds of the currant bush. As a result, fewer and fewer branches that can bear fruit remain on the currant bush.
Pests move to new branches of currants during the period of bud extension, and this period lasts for almost a month. It is the most suitable for fighting to destroy them, since the tick is still very vulnerable at this time.
How to deal with kidney mites without chemicals
To destroy the pest of currants, you can use various methods without resorting to chemicals. These methods include:
Mechanical method of dealing with a tick
Before the leaves appear on the shrub, all inflated buds on the currants must be cut off and destroyed by burning. In this case, one must be extremely careful not to confuse and not destroy the buds with the color. After collecting the buds with mites, the currant bush must be doused with ordinary boiling water, you can water it with a simple watering can. This must be done in order to destroy the pests remaining outside the kidneys. If there are several currant bushes on the site, then this procedure will take a lot of time. In case of a lack of time in the fight against a tick, another method can be used.
Use of biological agents
When leaves and inflorescences appear on currant bushes, it is necessary to spray the bushes with biological agents designed specifically for pest control. These funds include Fitoverm, Bitoxibacillin, Aktofit and other drugs. Bushes are processed 3 times with an interval of 7 days.
The greatest effect in the destruction of pests with biological preparations is achieved only in the warm season. Since the currants turn green early enough, during the period of frosts and rains, the effectiveness of the drugs will be reduced.
Processing currant bushes in cold weather can be done using garlic instead of biological agents. To do this, crush 100 grams of garlic. Then dilute it well in 10 liters of water. It is recommended to apply the solution immediately after its preparation.
Radical pruning of bushes
Using this method, you need to cut out all branches infected with a tick to the base. Gradually, young shoots form a new currant bush. Its growth must be closely monitored and, in the event of the appearance of kidneys infected with a tick, they must be immediately destroyed.
How to get rid of a tick on currants with pesticides
Colloidal sulfur is the most effective means of killing a kidney mite. The drug is used to spray the currant bushes themselves, and the plot of land around it at the stage of bud swelling and until the end of the flowering period of the plant. For spraying, you can use drugs such as Kinmix, Apollo, Endidor and others.
Prevention of the appearance of a kidney mite on currants
Prevention of the appearance of the pest should be started at the stage of planting seedlings. First of all, you need to check the quality of the seedlings. If a seedling was purchased from a special nursery, then you can be sure that preventive treatment has been carried out with it, and it is not infected. If the cuttings were offered by neighbors, then it is better to process them before planting.
The processing of seedlings can be done in two ways:
- The water must be brought to a temperature of forty-five degrees, the cuttings of the seedlings must be placed in it for 20 minutes and then kept in the prepared solution from Fitoverm for two hours;
- Prepare tea leaves 24 hours before planting the seedlings, for this, dilute the tea in a volume of 25 grams in a bucket of water and place the cuttings there for three hours.
If currant bushes are already growing on the site, they can be protected from bud mites by phytoncidal plants. One of these plants is garlic, which the kidney mite is afraid of. To do this, you need to plant ordinary garlic around the currant bushes every autumn. You can use the cloves of garlic directly as planting material, as well as the bulbs formed during the flowering of the plant and its shooting. Garlic phytoncides prevent the reproduction of the kidney mite and lead to its destruction.
Tick buds on currants. Garden World site
A small insect, a currant bud mite spends its entire life on a currant bush. This is a small (0.15-0.3 mm) creature with an elongated body in females. In the proboscis region there are 2 pairs of legs and 1 pair of legs. Females are twice as large as males. If a kidney mite appears on a currant, measures to combat it can lead to different consequences. Therefore, you should act very carefully.
The insect hibernates in the kidneys, and becomes more active with the onset of warmth. Females lay eggs in young buds. Soon, larvae hatch from them. As they grow, they become cramped in one kidney, and they spread to neighboring ones. This affects the entire bush, as well as everything growing next to it. The photos show how the young shoots were struck by the bud mite.
A diseased kidney does not develop, and if an shoot grows out of it, it is mutated. In addition to the fact that the number of shoots is reduced and the yield on currants is less, the insect is a carrier of viruses. From it, the bush can become infected with curl or marbling. Currants are not treated for viruses, and the bush must be removed. There are several methods of struggle. Among them, you should choose the most convenient and suitable one.
What is this pest
A bud mite is a small, thin insect with a body only 2 mm long. The color is light beige, the shape is worm-like. It is difficult to see ticks with the naked eye: they always hide inside the currant buds. Therefore, with the arrival of spring, it is recommended to regularly inspect the shrubs. It is advisable for novice gardeners to study the photos of the pest.
The main sign of damage is a deformed and withered kidney. It swells and bursts, over time either completely dries up, or gives sick shoots. As soon as the mites are done with one kidney, they go in search of another. Pests are carried by wind, rain, insects, animals, and rodents.
A kidney mite is dangerous because the affected shrubs slow down or stop growing altogether, which affects the yield. Outwardly, such a currant looks sick, so even as a hedge, it looks bad.
Why is a kidney mite dangerous for currants?
The microscopic size of one tick individual is more than compensated for by its fertility. In just 1 season, the female of this insect is able to reproduce offspring up to 5 times, increasing its number to 40 thousand during this time. Settling through the bush, the mites feed on plant juices, making numerous punctures in the buds, leaves, and young shoots. The photo of the kidney mite population inside the blackcurrant bud is below.
Currant systematically lacking nutrients is strongly inhibited. If you do not take any measures against the tick, the constantly increasing number of ticks will simply kill it in just 1 season. That is why this insect is one of the most dangerous pests.
How to deal with parasites?
With a minor lesion, in the initial stages, it is possible to cope with ticks with the help of folk remedies, physical and agrotechnical techniques. Mass resettlement is handled by resorting to biological and chemical pesticides.
These are auxiliary methods of combating parasites, allowing to reduce their number.
- destruction of weeds
- annual shrub thinning
- timely watering of currants in dry weather
- collection and burning of damaged leaves, leaf litter:
- autumn digging of near-trunk circles.
- early spring cutting of branches with numerous swollen buds.
You can get rid of spider mites by repeatedly watering the bushes with a stream of cold water from a hose. The parasites are washed off to the ground, where they die, mixing with the damp earth. Dampness is not very comfortable for pests, it suppresses their vital activity.
Swollen buds infected with a tick should be collected early in the spring and immediately burned.
Application of specialized tools
In the spring, while the weather is cool, the treatment of bushes with pesticides based on malathion (karbofos) will be effective: Antiklesch, Fufanon-Nova, Iskra M, Alatar, Inta-Ts-M. Spraying is done when the buds are swollen, immediately before and immediately after flowering. If the number of pests is large, the event is repeated after harvesting and in the fall, before leaf fall.
While malathion has a minimum waiting time of 3 weeks, sulfur-based pesticides have only 1 day.
The treatment of bushes with sulfur preparations is carried out:
- from bud mites - before and after flowering
- from spider mites - when a pest appears.
Colloidal sulfur is stirred in water at the rate of 50-75 g per 5 liters of water. Fungicide Tiovit Jet is diluted according to the instructions for the drug.
In warm weather (from 20 degrees and above), it is better to treat currants from any ticks with biological pesticides (waiting period 3 days):
- Spark Bio
Bitoxibacillin is also effective against spider mites (waiting period 5 days).
Affordable and environmentally friendly ways to control ticks are based on the phytoncidal effect of some plants:
- Infusion of garlic: 80 g of chopped heads are poured with three liters of hot water and kept for two days.
- Infusion of onion peels: 130 g per 3 liters of boiling water.
Bushes on which swollen buds are found are irrigated at the very beginning of the growing season, then before and after flowering. Spider mites are destroyed as they appear.
Characteristic features of pests
Kidney and spider mites are pests, the size of which rarely exceeds 0.5 mm. However, due to their number and fertility, they are capable of causing colossal damage to the site.
The difference between these arthropods is that the place of localization of the kidney mite is only currant, mainly its black-fruited varieties, while the spider mite lives on more than 200 plant species.
With the naked eye, the signs of the appearance of pests become noticeable when there is already a large colony of them on the plant. The measures taken to combat, as well as their effectiveness for the plant, depend on the time of detection.
In order to timely identify ticks, it is necessary several times per season to conduct a thorough examination of fruit and berry plants for the presence of unnaturally swollen buds, or deformed leaves that have changed color.
Representatives of the mite group are activated in April-May, when the buds on the plants begin to swell, the first leaves appear. This is the moment when pests are most vulnerable to drug exposure.
This pest affects only one type of berry bush, for which it got its name.
The currant kidney mite lives in the kidneys, as it does not tolerate high temperatures with dry air. During spring flowering, diseased buds wither, pests from them pass to young shoots. There they settle in the leaf axils, starting active reproduction. One kidney can contain a colony of up to 8 thousand ticks.
The main way to combat the pest is to regularly inspect the plants, identify and destroy the affected shoots. You can determine the infection of a shrub by its characteristic features:
- in winter, the buds in which the pests are located look larger than others
- in spring, the shoots affected by the mite lag behind in growth, there are few flower brushes, single young leaves are deformed and develop poorly
- in the summer, diseased bushes lag behind in development, the shoots are underdeveloped, there are very few fruits or they are completely absent
- in the fall, after the foliage has fallen, the difference in shape and size between diseased and healthy kidneys is clearly visible.
If there are only a few damaged buds on the bush, then it is enough to remove the shoot on which they were found. In case of severe infection, the plant must be cut off completely. Bushes grown from replacement shoots will not be affected by a bud mite. Sick shoots will never give leaves and a full harvest, so you do not need to feel sorry for them.
If you do not identify and destroy the spider mite on the currant in time, it can infect all the plants in the garden. In addition to currants, this pest loves to live on apple trees. It hibernates under fallen leaves, and with the onset of spring it rises to the plants again.
It is especially active in hot, dry years, settles on the underside of the leaf blade, where it makes punctures, sucking out the juice. Signs of his presence become visible almost immediately, namely:
- necrosis appears on the upper part of the leaf, which is a consequence of cell death
- a pest colony initially looks like a plaque on a leaf blade
- after an increase in the number of individuals in the places of their localization, a thin web becomes visible
- leaves dry on the affected plants, flowers and ovaries fall off.
The spider mite has more than 1200 species, about 100 genera. The most common is considered ordinary. The color of this representative depends on its age:
- the larval stage is always light green or greenish brown
- in adult females that have passed the winter, the color ranges from orange-red to deep red.
During the season, the female pest makes 5 clutches, each of which can contain up to one hundred eggs. After a week, larvae appear from the clutch, and after another 1.5-3 weeks - a nymph.
The appearance of white and yellow spots on the leaves of an apple or currant is the first signal of their infection. Affected plants become susceptible to any type of disease and develop poorly. A large accumulation of pests can lead to loss of yield and complete death of fruit trees and shrubs.
It is easier to prevent the defeat of fruit crops, otherwise after that it will be necessary to eliminate the consequences. Kidney mite prophylaxis includes a whole set of recommendations.
- Place bushes at a certain distance to provide space.
- Observe the principles of crop rotation and place currant bushes in the garden away from the gooseberries.
- Disinfect the planting material with a solution of "Agravertine" (10 g) and colloidal sulfur (40 g) in 10 liters of water for twenty hours.
- Observe the timing of the introduction of nutrient compositions for the currant bush in order to strengthen it.
- Destroy any weeds.
- Systematically inspect shrubs and remove parasite-infested buds.
- Throw the cut branches, foliage and old mulch on the fire without fail.
- Periodically spray the currants with acaricidal preparations.
Carrying out measures for the recovery of currants, you need to thoroughly disinfect the tool before working on a new bush.