How to deal with spider mites on strawberries?
Growing garden strawberries is associated with many subtleties, it requires knowledge of the characteristics of planting and caring for this delicious berry. But in order to get consistently high yields, you will have to take action against many pests of this crop. The appearance of a spider mite is especially dangerous for her.
Why does a tick appear?
Unfortunately, the spider mite on strawberries is not uncommon, this microscopic insect is difficult to spot, and a strawberry plantation can suffer greatly due to its presence. The parasite can cause the greatest harm to adult bushes at the age of 3-4 years, so you should carefully examine the strawberries when leaving, and start fighting the pest at the first sign of damage.
Many gardeners are interested in what factors influence its appearance, and what, in fact, is its harmfulness.
There are several reasons for the reproduction of an insect on strawberries:
- initially affected planting material;
- penetration of infection (mite larvae) through clothes and shoes;
- a warm, moist environment that is favorable for the replication of the microorganism.
This type of tick belongs to arthropod arachnid creatures, has a rounded body covered with sparse bristles. Its color can be either yellow and brown, or greenish, merging with the foliage of the plant. Getting on strawberry leaves, the insect braids the bush with cobwebs and begins active and very fast reproduction.In hot and humid weather, its offspring appear already on the third day after laying eggs. If the parasite is discovered too late, it has time to produce many similar organisms, and then you can say goodbye to the crop.
How to determine the infection?
Basically, these creatures settle on young strawberry stems and the underside of the leaf, thus hiding from the sun's rays. For this reason, it is almost impossible to see them, however, the state of the bushes may indicate a defeat.
The main symptoms confirming the presence of a pest:
- slow growth of culture - the bush seems smaller, its green mass and height do not reach standard sizes;
- the color of the foliage changes, it becomes yellow, wrinkled, subject to twisting and falling;
- some leaves are in a web or a whitish film, mainly this is the lower part of the leaf plate.
The bush will continue to dry and ache as the parasite feeds on the sap of the leaves. Because of this, the berries also dry out and decrease. In winter, such plants are likely to die. The danger of this microorganism for a crop such as strawberries lies in the fact that, in addition to depleting the plant, it is also a carrier of diseases. There are frequent cases when, as a result of a mite infestation, strawberries were subjected to such an unpleasant disease as gray rot.
The pest, despite its short life cycle, can produce up to 12 new generations of parasites during the summer, and in early September its population can grow to enormous proportions.
To get rid of insects, the fight against them must be comprehensive and constant throughout the season.
Prevention
It is easier to prevent the emergence of a dangerous microorganism by periodically taking preventive measures than to deal with its constantly growing population.
Here is a list of actions that every gardener needs to remember:
- it is necessary to start processing in early spring after the snow melts; for this, hot water is poured over the ground of the beds;
- if a tick is found, it is necessary to remove the damaged leaves, and sometimes it is worth getting rid of the entire bush, since the infection can spread from it to neighboring plants;
- in autumn, old strawberry leaves, mustaches and weed grasses must be removed because the pest can overwinter under them;
- during dry times, irrigation should be carried out regularly;
- so that the culture can resist the microorganism, it must be periodically fed with organic and mineral fertilizers;
- since old strawberry bushes are characterized by lower immunity, they should be transplanted to new beds every four years;
- when buying seedlings or preparing them yourself, you need to make sure that they are not infected;
- young seedlings can be secured if they are immersed in hot water for 10-15 minutes;
- if the treatment is carried out during fruiting, the water temperature should not exceed +60 degrees.
In addition, there are repellent, biological agents that are harmless to the plant that can be used against insects.
Methods for eliminating insects
If a tick has appeared, then most likely it will not be possible to completely destroy it, and you can only limit its reproduction, which will require a systematic fight involving the use of insecticides and folk remedies.
First of all, it is necessary to ensure that the array of bushes is not too dense, and they are regularly ventilated, receiving a sufficient amount of sunlight that the tick cannot stand.
Consider effective chemical means for the destruction of a harmful insect.
- "Vertimek"causing paralysis and death of the microorganism. An insecticide should be treated with a bush when a pest is first detected. It should be borne in mind that the drug is dangerous not only for insects, but also for birds.
- "Fitoverm" - allows you to destroy the tick within three days. The product has an average degree of danger, but can cause the death of bees.
- "Aktofit" - the insecticide acts on the nervous system of the insect, immobilizes it, after which it dies. It is important to carry out processing at a temperature above +18 degrees.
Gardening experts also recommend using such a well-known tool as Karbofos to eliminate a harmful microorganism. It has a short-term effect, but after two weeks, and sometimes even earlier, the chemicals in the soil are destroyed.
Processing, preferably done in August, after harvesting:
- leaves should be mowed;
- each leaf plate is watered with a warm aqueous solution of the drug (for 8 l 60 g of the substance);
- cover the strawberry bed with a film and leave for several hours.
You can use folk recipes to get rid of a garden aggressor, including spraying:
- freshly prepared garlic water (per bucket 200 g of the product);
- decoction of dandelion leaves, infused for about four hours;
- filtered infusion of onion husks.
It is also reasonable to use soap decoctions or solutions with ordinary washing powder.Some advise making a product based on soap, water and alcohol - the treatment is repeated twice at intervals of a week, thanks to this, tick eggs can be destroyed. To enhance the effectiveness, the use of such agents is combined with chemicals.
It is important to alternate different methods of disinfection, as the insect quickly adapts to adverse conditions.
Any spraying is best done in the evening, when there is no wind.
Novice gardeners who are not yet well versed in methods of dealing with mites and other pests may want to start cultivating strawberries with more resistant varieties that are immune to these microorganisms.
These include:
- "Cinderella of Kuban";
- "Sunrise";
- "Anastasia";
- "Purple";
- "Sunny meadow";
- "First Grader".
Hybrid plants are the strongest and most resistant, but they are also susceptible to infection and disease, although to a lesser extent.
For information on how to deal with spider mites, see the following video.