How to deal with the whitefly in the greenhouse

If there is a whitefly in the greenhouse, it is necessary to take measures as soon as possible, otherwise this nasty tiny infection will destroy all the landings. Rather, not herself, but her larvae. The problem of gardeners is that at a certain stage of development, the larva has a dense wax cover. It protects it very well from various insecticides.

How to deal with the whitefly in the greenhouse? There are methods. But they require systematic and perseverance.

Are small flies always a whitefly?

First you need to determine that it is whitefly. Out of ignorance, some confuse her with aphids. The mechanism of harming these insects is the same - they both suck the sap of plants. But this is where the similarities end. Signs of plant damage by whitefly:

1. Shake the plant.Whiteflies fly in flocks, they are very similar to the tiny white mole.
2. On the back side of the leaves live larvae. They look like shiny scales.
3. With a strong lesion on the leaves appears black oily sticky plaque. This is a fungus. He almost always attacks the plants affected by the whitefly.
4. Nearby there are no ants that accompany the aphids.

If you do not begin to act, then in 2-3 days in your greenhouse will remain miserable remnants of plants with twisted leaves.

Mechanical methods of struggle

Lime whitefly is very difficult. But, if you carry out a full range of procedures, it is quite possible. The first method is mechanical. Butterflies are very fond of blue and yellow. Therefore, at a height of 15-20 cm above the plants, it is necessary to hang sticky traps of the chosen color.

Some sources recommend the use of thick cardboard or pieces of plywood. We advise you to take plastic. It's just easier to launder it later. From what? From sticking butterflies. Because just hanging yellow pieces of plastic will not help. They should be smeared with something sticky:

• Vaseline mixed with honey 1 to 1
• Castor oil
• honey and rosin 1 to 1 (melt)

If it is not possible to independently prepare a sticky composition, then smear with commercial glue for cockroaches, ants or mice.

After the traps are hung, you need to go through the greenhouse and gently shake all the plants. Whiteflies soar, stick to plastic. They are washed away, put a new portion of sticky composition. Then the procedure is repeated. This is done several times.

This will help get rid of most of the adult insects. With the larvae mechanically fight differently. They are simply washed away with a strong stream of water. Or wash each leaf with a soft cloth with soapy water.

The methods are good if you carry them out regularly. This helps the plants to withstand the onslaught of insects. But, to completely get rid of the whitefly in the greenhouse, you have to work hard.

Freeze or smoke

In regions with cold winters helps freezing greenhouses. With the onset of steady frosts, it is necessary to open all the vents and doors. Then you should take out all the snow on the street so that its layer is as small as possible. This will allow the soil to freeze to the maximum depth.All whitefly pupae will die.

What to do the owners of greenhouses of the southern regions? After all, there are severe frosts - rare guests. Infected greenhouses are smoked. Only not sulfuric, it does not help. Tobacco checkers do an excellent job with the whitefly. They are set on fire (4-5 pieces) and tightly close the greenhouse for a day. Did not find a checker on sale? Buy 4 packs of the cheapest non-filter cigarettes. Gutting them, spread on plates or metal sheets. Lit, then stew, leaving only corruption. The principle of action - like checkers.

Chemical methods

The insidiousness of the whitefly is that all subsequent generations quickly become accustomed to the insecticides used. Consequently, the larvae are absolutely on the drum your chemical sprayings. Plus, their wax coating is almost impenetrable. Therefore, you need to use chemistry every time a different one. The most effective for the fight against whitefly in the greenhouse drugs from aphids. Only here before using it is necessary to remove all unripe fruits. Because plants are well absorbed by the poison. And let the insects drink poisonous juice better than humans.

Instead of spraying, fumigators can be used. Turn them on at night, the vents tightly closed. Or they burn mosquito coils.

Helps spraying dichlorvos in the greenhouse. 3 times with an interval of 9-12 days. Strongly not suitable for greenhouses with the planting of green and spicy herbs. They are then almost impossible to clean up the bane. But for planting vegetables, the method is quite suitable. After harvesting, they can be washed with a brush under running water.

Very good proven infusions of plants with caustic or poisonous juice. These include garlic, dandelion, tansy, yarrow, tobacco. The method of preparation of the infusion is very simple. Take 100 g of fresh raw materials, pour 1 liter of boiling water. Insist day, then filter. Spray the plants 4 times with an interval of 5 days. Be sure to spill the land around the landings infusion, diluted with clean water 1 to 1.

Alternatives

There are several reviews about interesting methods of controlling whitefly in a greenhouse:

1. Sugar. At 1l of water put 1 tbsp. l sugar, stir, then spray planting.
2. Alcohol 96%. For 1 liter of pure water add 50 ml of medical alcohol.Used for spraying.
3. Venus flytrap. Planted several plants in the greenhouse. Eats only butterflies, against the larvae is powerless.
4. Vinegar. For 10 liters of clean water, you need to take 5 tbsp. l acetic essence 70%. Stir and spray.
5. Birch tar. 3 tbsp. l on a bucket of water. Sold in any pharmacy.

As you can see, all means are good in the fight against whitefly. And with each season gardeners invent new ways.

Biological methods

In nature, there are three natural predators for the whitefly. You can hook them in greenhouses. After some time, they independently destroy all the nasty creatures.

1. The most common ladybug. They are caught in the meadows and brought into the greenhouse. The bigger, the better.
2. Predatory bug. Catch it yourself is unlikely to succeed. But you can order on the Internet.
3. Enkarsia A small insect like a fly. Also purchased through specialized sites.

It is very important at this time to stop using poisonous drugs. Otherwise, the predators will die and there will be no sense.

By the way, planting tansy or dill in a greenhouse attracts predators from the outside with the scent of predators.Then even the riders and the golden-eyed men arrive. The first lay eggs in the larvae of the whitefly, and the latter gladly eat them.

Prevention

Be sure to observe the temperature. At 22 ° C and above, the life cycle of the nasty butterfly is accelerated. Accordingly, the number of pests is increasing. Too high humidity also applies to this moment. Therefore, regularly ventilate the greenhouse and do not thicken the landing.

Periodically help plants adaptogens. This gives them vitality and sometimes nasty butterflies do not taste.

Valuable tips

1. By itself, the whitefly does not start. Usually it is brought to the greenhouse by the owners themselves with new planting material. Therefore, before planting something, carefully examine each leaf.At the slightest suspicion, throw away the plant, do not risk it.
2. In the fall, all the remnants of the landings are carried outside the site and burned. The inside of the greenhouse is treated with kerosene, a strong solution of copper sulfate or bleach. Do not forget about overlappings and security measures.
3. When spraying with any product, be sure to thoroughly wet the bottom of the leaf plate. Because the whitefly larvae live only there. Surface wetting of the upper part will not bring the desired result.
4. When time is missed and a black fungus appears on the plant, it is best not to spend money and your nerves. Without regret, we must get rid of infected plants. Drugs for the treatment of such a fungus does not exist.

How to deal with the whitefly in the greenhouse? Diligently and patiently. You will have to use all available methods to get rid of these annoying pests.

Video: how to deal with the whitefly