Home begonia - pests, diseases and their treatment
On the pages of my blog, I already talked about the beautiful flowers of begonia, that at home, and today I will talk about pests and diseases of begonia and how to treat them.
Like any living organism, plants, including begonia, are susceptible to diseases and attacks of various pests. What makes begonia sick?
Most often, diseases occur due to improper care of the flower, improper selection, treatment of the soil used for planting or transplanting plants. Methods to combat diseases and pests are different - from the simplest methods to the most cardinal.
Sometimes it is enough to return the flower to the old place. And in some cases, it is necessary to carefully remove the damaged leaves, parts of the rhizome, stem, processes. So, below you will find a solution to the problems that most worry begonias.
When not properly watering and care in general, the flower leaves begin to dry. Why is this happening? First of all from the wrong temperature. How to fix the situation? You can moisten the air by placing water tanks near the plant or simply spray the flower more often. When spraying it is important to ensure that moisture does not fall on the buds and flowers.
Another reason for leaf drying may be improper spraying, or rather, spraying with cold, not settled water. The fact is that in tap water sometimes an increased concentration of fluorine and chlorine can be observed, which leads to a similar problem. Therefore, it is so important to spray (as well as watering) only with settled or rain water!
In some cases, improper drainage of the soil can cause the leaves to shrink and curl. The stagnation of moisture on the bottom of the pot can lead to rotting of the roots, and a lack of moisture leads to drying out of the soil, as a result of which the leaves are deformed and the buds fall early. Compliance with the rules and technology of watering will help to avoid such troubles.
Pests on begonias
Begonia can also be dried due to the presence of pests - aphids, spider mites, thrips.
They fight against these pests by spraying the plants with extracts of tobacco, green soap solution, benzophosphate solutions, selecron, and other chemicals designed to combat these pests.
Visual inspection of the plant will help determine the presence of pests. For example, if on the back of a leaf you see brown and brown spots (sometimes they can also be silver), the leaves seem to have faded, then most likely you are dealing withthrips.
Spider mitemakes its presence a thin web on the leaves, the stem of the plant. The reason for the appearance of spider mites may be inappropriate conditions for the maintenance of the flower - too high a temperature and frequent abundant watering.
If the leaves turn inward as it were, they get a marble shade - it's time to start a fight with a tick. By the way, if the leaves turn yellow and fall off, also check the plant for the presence of a tick. You can destroy it with the help of Decis - a drug designed to combat such pests.
The flower and one more unpleasant pest -false guard. It is destroyed by spraying solutions of aktklika, chlorophos, hostavika.
It is impossible not to say about such a pest known to all asaphid. She settles in whole colonies and multiplies rapidly. Aphids feed on the sap of the plant, thereby weakening and destroying it.
To combat aphids, they use solutions of green soap, tobacco extracts, special chemicals that can be found in specialized stores.
Hazardous pests of the root system are consideredGallic nematode. When the gall nematode plant grows poorly, the root system does not develop. Most often, plants that are infected with a nematode are destroyed, but if the damage is not very large, then you can try to save it.
There are several ways to fight: mechanical, thermal, biological, chemical.
With the mechanical method, the bush is dug up, removed, and divided into several parts. At the same time destroy the heavily affected areas. After that, the parts are seated in pots and insulated.
In isolation, begonia should be kept for at least a year.
During heat treatment, the roots cleared of the ground are dipped in hot (approximately 50 °) water and held for 5 to 15 minutes. After that, the plant (roots) is placed in cold water and then planted in a new clean soil.
The roots of nematodes can be cleaned with the help of biological preparations containing organisms that are aggressive to pests (parasitic fungi, ticks, etc.). However, it is worth remembering that such a method will not destroy nematodes, but will only reduce their number. Therefore, after the introduction of biological drugs, after some time it is necessary to conduct mechanical or thermal treatment of the roots.
The chemical method of struggle is to use special preparations of the nematocide family (Fotoverm, Actofit). As a rule, they are produced in the form of a powder, which is scattered on the surface of the soil. But chemical preparations are mainly used for the prevention of root nematodes. When the plant is already affected by the disease, the chemical method is not effective.
Before treatment with special preparations, all damaged parts of the plant are necessarily removed and destroyed.
Begonia turns yellow
The reason for the yellowing of the leaves of begonia is most often the wrong care of the plant, especially the wrong watering. Excessive and abundant watering often results in yellowing of the leaves. By adjusting the watering, you will get rid of this problem.
Do not place the plant near heating devices - begonias are sensitive to environmental humidity and temperature. It is necessary to adjust these factors and begonia will once again delight you with its blooming look.
In addition to all the above, the reason for the yellowing of the leaves may be a shortage (or vice versa, an overabundance) of trace elements. Feed correctly - and the leaves will always have a beautiful bright color.
The most common diseases are powdery mildew and gray mold.
The fact that begonia is damagedpowdery mildewdetermined by the appearance of whitish plaque on the leaves. For the treatment of this disease, solutions of Morestan, Fundazole or soap solution of copper sulfate are used.
The solution is prepared as follows - per liter of warm water 20 grams of soap (tar or household) and 20 grams of copper sulfate. Everything is mixed well until the substances are completely dissolved in water and the plant is sprayed with this solution. This solution is also called Bordeaux liquid. This fluid is effective against gray rot.
Gray rotmanifested by the presence of gray wet spots on the leaves.If not to carry out treatment, then over time leaves start to rot, dry and fall down. The reason for the appearance of gray rot is considered to be improper watering, increased soil moisture, lack of proper drainage of fluid.
Gray rot is affected by adjusting irrigation and spraying with special preparations.