Description of orchid pests
While growing indoor orchids, gardeners have to deal with parasites that infect it. There are several types of orchid pests, and each one should be dealt with in its own way.
The destruction of harmful insects at home and in greenhouses is carried out using pesticides. Chemistry helps to overcome parasites, but the likelihood of their reappearance is high. The thing is that flower pests have a larval stage - during the dormant period, small larvae painlessly tolerate several chemical treatments.
Each type of parasite has its own scheme and processing interval. This allows you to destroy the larvae during their transformation into a more mature stage of development.
Causes of Pests
There are several common reasons why parasites appear on phalaenopsis orchids:
- The purchased copy has already been infected. When buying a plant, it is important to carefully examine it for damage by harmful insects.
- Contaminated substrate. Use purchased soil.
- Insects moved from one plant to another. This happens with an abundance and thickening of indoor vegetation.
Common Orchid Pests
Flowers are most often affected by such parasites:
- mealy and root worm;
- mushroom mosquito;
- scale shield;
This insect is a dangerous pest of the Phalaenopsis orchid. It starts in the bark used to prepare the substrate of plants, or is introduced with dust or other pests: aphids, ants.
Worms settle on flowers, in the soil, on the roots, at the base of the stem, under the scales of the leaves. With a massive invasion of the plant, a white coating appears, similar to cotton wool or cobwebs.
Females lay eggs on the underside of the leaf plate. Hatched larvae suck juice from the leaves of plants, then fall into the soil and parasitize on the roots.
To remove the mealybug, the root system of the plant is washed with Fitoverm. All damaged parts on the flower are removed and treated with charcoal powder. The flower is transplanted into a new substrate.
For prevention purposes, re-treatment of already new soil is carried out. Every 5 days, the leaves are wiped with the same tool 3 times.
To prevent the parasite from reappearing on the plant, wilted and dried leaves should be removed in time, try not to overfill the flower and provide it with good lighting.
Parasitic insects settle on leaves, stems or roots. There are several varieties of nematodes; on orchids, white or transparent worms up to 1 mm long are most often found.
These pests of phalaenopsis orchids feed on plant sap, after which the affected areas become brown or black, and then die.
Having noticed these signs, the plant should be immediately quarantined, because the nematode moves to other flowers.
- The Dekaris. 1 crushed tablet in 1 liter of water. The finished solution is watered with a substrate.
- Use of non-masticidal drugs: Diazinon, Heterofos, Fensulfotion, Karbofuran, Aldicarb and Thionazine.
Handle affected flowers carefully. Such drugs are highly toxic to humans and pets. In order not to encounter nematodes on orchids, you should try to improve care.
In appearance, these insects are somewhat reminiscent of a match head. They parasitize on pseudobulbs, leaves and stems. Small scale insects about 0.2 cm in size during their life release sticky droplets in which a sooty fungus multiplies. Dark spots on the surface of the plant indicate the presence of a parasite.
- Manually remove the pest from the flowers.
- Spray the plant with Fitoverm or Actellik. Repeat treatment after 7 days.
- Move the flower to another flowerpot with a new substrate, pre-rinse the roots with a fitotherm.
Nailtails, or podura, are small caterpillars of creamy, white, sometimes light green color with antennae. Their size is about 2 mm. On the abdomen of insects there is a special shield with which they can bounce. This unique ability of caterpillars makes it possible to distinguish jumping podur from mealybugs.
The primary measure to get rid of parasites is to stop watering. If this does not help, use insecticides.
The drug "Bazudin" helps to get rid of the parasite. It is scattered with a thin layer on the surface of the substrate. After a few hours, the pests die.
Other means help fight orchid pests: Aktara, Pochin and Mospilan. To get rid of parasites, the earth is cultivated at least 2 times with a frequency of 10 days.
There are several types of ticks:
- Root (bulbous). An adult insect is white, larvae and eggs are yellow. The danger of this pest is that it is almost impossible to notice. This insect penetrates the roots, sucks out the juice and deprives the flowers of food. At the advanced stage of damage, the roots have only a shell with voids inside. An onion tick is a carrier of fungal disease.
- False spider web (flat-bodied). This is a red or red insect that feeds on leaf juice. The affected foliage first turns gray, then turns brown and disappears.
- Red spider web. This is a small red spider that weaves a web of foliage. He sucks juices from the tissues, as a result of which the leaves turn yellow, curl and fall off. When the parasite invades, orchids do not form flower buds.
Methods of struggle
For effective control, the root system is removed, dead parts are removed and the plant is treated with Fitoverm, then the plant is transplanted into a new sterilized substrate. Also, double treatment with the same means of the aerial part is carried out with a frequency of 7 days.
To cure the plant with the invasion of the red spider mite, the flower should be treated with phytoerm. Spray 3 times with a frequency of 5 days at a temperature not lower than 30 ° C. To prevent its reappearance, indoors provide high humidity.
To exterminate a tick-squid, the flower is sprayed with the same means and according to the same scheme as in the previous case.
There are several varieties of midges that settle on indoor orchids. Knowing what type of midges parasitizes on an orchid, they determine how to deal with the pest.
These are small black insects with a length of 3 to 5 cm. Popularly, sciarids are called flower midges.
They lay eggs in the ground, from which white, vermiform larvae begin to develop. Such worms do no harm to plants. They pose a great danger to the root system. Often worms of sciaridae appear in the soil of weakened or young orchids.
Fungal infection and root rot develop in damaged areas.
It is possible to save the plant, but it is easier to prevent the appearance of parasites by using special sterilized substrates for growing flowers. If the preparation of the soil is carried out at home, it is thoroughly pierced in the oven or kept in the cold for a day. In order to avoid infection by midges, it is forbidden to fertilize flowers with tea, coffee, food residues.
They fight pests of orchids of this species using the preparation “Thunder-2” or “Bazudin”. The soil is sprayed in a pot, and after a week the procedure is repeated.
Whitefly butterflies are pests of Phalaenopsis orchids, similar to white flies. At the slightest touch of a flower, they quickly fly up into the air.
Adults and their larvae feed on foliage sap. Heavily affected specimens gradually wither away, their leaves turn yellow and curl up into a tube.
The fact that these pests wound up on flowers is determined by the presence of eggs and whitefly larvae. They are concentrated on the underside of the sheet plate, under the bark and on the surface of the substrate.
It is difficult to notice these insects, because they lead a nocturnal lifestyle. Small black pests, 2.5 mm in size, feed on orchid juice, affecting not only leaves, but also buds, flowers, and root system. In appearance, they resemble sticks with two pairs of wings folded on the back. Habitat - soil substrate.
You can see the parasites by carefully examining the soil in the pot. Also, the presence of thrips is indicated by dark spots on the leaves.
The midge (Drosophila) attracts rotted soil by watering the plants with tea. These reddish small flies of 1-2 mm in size rapidly multiply in a humid environment, especially in places where there are rotting fruits, rotten remains of vegetation.
They warn that the plant suffers from an excess of moisture. And this threatens the development of root rot and wilting of the flower.
They get rid of midges by reducing the dose and frequency of watering, as well as removing any food debris from the room that is sour or rot.
Orchid Care Rules
In order not to resort to the treatment of pests of Phalaenopsis orchids, they take preventive measures and provide competent care to the plant.
- Provide orchid with good lighting. Do not put it under the sun, otherwise it will get severe burns, the leaves will turn yellow, and the flower will become vulnerable to many pests. He needs a 12-hour ambient light.
- Provide the plant with a stable temperature in the range of 20-27 ° C during the day and 15-23 ° C at night.
- Watering not too often in small doses to prevent overfilling. The soil should not dry out, otherwise the plant will lose its decorative effect and weaken. Water is used warm, settled.
- Spray the orchid regularly in the morning.
- Fertilize flowers every 3 weeks.
Regular inspection of plants for the presence of diseases and pests helps to detect the problem in time.
Methods of controlling pests of orchids depend on the type of parasite, which is why it is so important to know the name and description.