How to deal with Whitefly?
Whitefly is a dangerous plant pest. These small flying insects are a bit like miniature white moths swarm soaring above a disturbed plant. On the leaves of the affected culture you will find both pest eggs and their larvae in the form of small grayish grains. In this publication, we describe the main methods of controlling whiteflies.
- What kind of whitefly is she?
- How to prevent the appearance of whiteflies?
- External signs of a whitefly plant damage
- Whitefly Control Measures
Check out our new detailed article: Whitefly and Pest Control.
What kind of whitefly is she?
Whiteflies, or Aleirodides (Aleyrodidae) - a family of small insects. It has about 1550 species, 160 genera and 3 subfamilies. In Central Europe there are about 20 species. The scientific name comes from the Greek word aleuron (flour) due to powdery plaque on the wings, and Russian - by the presence of 2 pairs of white wings.
European species of the family, usually about 1.3-1.8 mm in length (up to 3 mm). A little reminiscent of a small prayer-like Lepidoptera. They have 4 wings, which are covered with a white dusty coating, reminiscent of flour. Larvae of the first age are motile, the subsequent ones are motionless. They feed on plant juices. Usually held on the underside of leaves. Some species are dangerous quarantine plant pests.
The favorite diet of whiteflies from indoor flowers, first of all, includes: fuchsia, begonia, balsamine, passionflower, pelargonium, lanthanum. For lack of a favorite, whitefly can attack most houseplants. In greenhouse-greenhouse conditions, prefers tomatoes and cucumbers, but does not disdain other plants.
How to prevent the appearance of whiteflies?
Whitefly appears where high temperature is combined with high humidity (greenhouses, greenhouses - above all), there is not enough ventilation, plants are placed too closely. For this reason, firstly, it is necessary to provide the plant with optimal moisture and temperature conditions and ventilation.
Also, everything that strengthens the plant has a preventive effect, drugs - a healthy, strong plant with less loss will survive the invasion of whiteflies, provided that you still defeat it.
Natural enemies of whiteflies, for example, lacewings and ladybugs, can quickly destroy pests.
External signs of plant damage by whitefly
Usually, whiteflies hide on the underside of leaves. On the upper side of the underlying leaves, a shiny coating appears (copper dew, or pad) - insect stool, on which soot fungi (“blacks”) subsequently develop, due to which the surface of the sheet becomes first white and then black.
It is believed that sooty mushrooms can greatly harm the plant, and not directly whiteflies. Sometimes, because of them, the growth of shoots stops.
Whitefly Control Measures
Biological methods of controlling whitefly
Recently, biological methods of controlling whiteflies have become more widespread. One of them is the placement in the greenhouses of pupae of the enkarsia parasite. The female of this small insect lays its eggs in the body of the whitefly larva. Moreover, the effectiveness of this method is very high.
Also, to combat whiteflies, predatory bug Macrolofus is used.
In the fight against whitefly, common insecticides are effective. It should be noted that it is dangerous for a long time to be in the room where the plants were treated with insecticides. Also, when processing it is necessary to use protective equipment: a respirator, glasses, gloves, work clothing.
- Actellik. Dilute the ampoule in 1 liter of water and treat during the pest. The flow rate of the solution is up to 2 liters per 10 sq.m. No more than 4 treatments. The waiting period is 3 days.
- Verticillin f - 25 ml per 1 liter of water. Double spraying with an interval of 7-10 days.
- Confidor (20% WRC) 0.1 ml per 1 liter of water. Single spraying.
- Mospilan (20% RP) - 0.05-0.06 g. Single spraying.
- Pegasus (25% CE) - 2 ml per 1 liter of water. Double spraying with an interval of 7 days.
- Fufanon (57% CE) - 1.2-1.5 ml. Single spraying.
- Fosbezid Dilute 5 ml per 5 l of water, flow rate - 100 square meters. m
Folk remedies for whiteflies
Glue traps can be used to catch adults. To do this, take pieces of plywood or hardboard, paint them yellow or white and grease them with petroleum jelly, rosin with honey or castor oil. Insects attracted by bright yellow or white (preferably yellow) color sit on these baits and stick. When a lot of them are typed on a piece of plywood, they wipe it and again lubricate it with the same solution. You can also use glue traps for flies.
Whiteflies do not like lowering temperatures, so you can transfer the plant to a cooler room. Since whiteflies fly, they can be caught on sticky tapes (sold at fly fishing stores).
You can use folk remedies, for example, herbal infusions against insects - they spray plants. Relatively effective infusion of garlic. Chopped garlic cloves (150-170 g), pour 1 liter of water and insist in a tightly sealed container for five days. For spraying, 6 g of concentrate diluted in 1 liter of water is sufficient. Keep in mind that folk remedies can help if there are not too many pests.
Try to rinse the plant with clean water - whiteflies are washed off well. After this procedure, it is necessary to loosen the top layer of soil in the pot.