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We fight with a white coating on the orchid

Why does white plaque appear on orchids? There are two common possible causes: a fungal infection (powdery mildew) or an attack by a pest (powdery mealybug). Why the problem arises and how to solve it using effective bio-drugs, we will tell in the article.

We fight with a white bloom on an orchid (mealybug)
How does powdery mildew and mealybug manifest?
With powdery mildew, a white coating usually appears on the underside of the leaf. The coating is powdery, the texture resembles powder or flour, and it can easily be removed with a finger. With the progression of the disease, plaque becomes gray, spreads to stems and leaves, buds and roots.

With a mealybug, white flakes appear on the leaves. The plaque is white, cottony, sticky, sometimes sticky drops can also be noticed on the orchid. When attacked by a pest, buds and leaves are deformed. If the parasite reaches the root system, the plant begins to die slowly.

When infected with a parasite, indelible harm is caused by the female insect. She sticks to a leaf of a plant, drinks juice and at the same time injects poison poison. The mealybug also leaves sticky traces, which are an excellent medium for the spread of soot fungus.
The pest nest can be detected by a clot of white air raid. Both adult individuals and larvae (small white dots) live in it.

Also, white plaque on a leaf plate is most often the result of improper care, which led to a weakening of the orchid’s immune system. Due to inappropriate conditions of detention, the metabolism is disturbed, this leads to a change in the composition of vegetable juice. As a result, the orchid is an excellent target for parasites and the rapid progression of fungal infections.

Reasons and stages of the struggle
We single out a group of main reasons:

Frequent top dressing with nitrogen fertilizers.
Dryness or excessive humidity in the room.
Frequent watering – water stagnates in the ground.
Contaminated soil.
Fallen dried leaves, dried flowers in a pot. They begin to rot, are a “house” for parasites.
When infected with powdery mildew or mealybug, different treatment measures are required. But mandatory general actions:

isolation of the infected orchid from other plants;
removal of all damaged parts (leaves, buds), fill the place of cuts with crushed activated carbon;
only after removal of the infected leaves can treatment begin.

How to treat with mildew infection?
It is necessary to remove the top soil layer and fill the pot with new soil. Sprinkle new soil from above with ash (thickness up to 2 cm). Further, before planting the plant, it is necessary to use the microbiological preparation Tamir Bioprotection, it is intended to protect plants and planting material from fungal and bacterial diseases. Water them the soil.

What to do if a mealybug appeared?
Collect all the insects from the plant by hand, wipe the leaves of Tamir Bio-barrier – a microbiological preparation intended for pest control. It can be used to treat plants during prophylaxis and during mass insect infestations.

Next, put the orchid in a bag, spray the plant and tie the bag for 2-2.5 hours. After the expiration date, get the orchid. Repeat the treatment 3-4 times, the time interval between the procedures is 10-14 days.


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