What are the insect pests in planting orchids and how to control them?

The most common diseases and insect pests of orchids are shellfish, snails and slugs.

The harm of shell insects

Scale insects are common pests in orchid cultivation, which are mainly parasitic on the stems and leaves of orchids. A prick aspirator was inserted into the tissue to absorb juice, which affected the normal growth of the orchid plant. The wound is easy to be infected with diseases, and the secretions of shell insects can easily lead to black mold. Scale insects have a strong reproductive ability. Orchids can breed many generations a year. The egg hatches into a nymph and forms a shell after a short period of crawling. Because the shell insect has a waxy shell, it is not easy for pesticides to enter, so it is difficult to control it. Once it happens, it is not easy to clean it up.

How to control shell insects by planting orchids

There are many kinds of shell insects, and the common ones on orchids are: Shield, stripe powder, orchid, bran shield, mulberry and so on.

When a small amount occurs, it is usually controlled manually. It can be brushed off gently with a soft brush, and then rinsed with water. According to the occurrence of shell insects, chemical control is sprayed during the incubation period of eggs. During this period, soon after the nymph hatched, the body surface of the nymph had not yet formed a wax shell, so it was easy to kill with chemicals. Spray once every 5 times for 7 days, more than three times in a row. 1000 times can be sprayed with 50% omethoate emulsion, 50% malathion emulsion, 25% imidophos emulsion or 80% dichlorvos EC. Spray it evenly and thoughtfully, spraying both the front and back of the leaves. If the pest is too serious, artificial brushing and then combined with spraying, the effect is better.

Snails and slugs are molluscs

A snail has a hard shell to protect its soft body, and a slug has no shell. These two kinds of animals often appear in perennial damp and dark orchid greenhouses, and they are afraid of dampness, dryness and strong light. Hide in dark and wet places during the day, come out at night and eat the young leaves, roots, and flowers of orchids. Because of the large amount of food, the whole orchid can be eaten beyond recognition in one night.

Once a large number of occurrence, the harm is more serious. When there are bright lines of transparent liquid on the leaves, the edge of the basin and on the bench, it can indicate the activity of this kind of mollusks.

How to control snails and slug molluscs in orchid culture

1. Poison bait: mix wheat bran with arsenic trichlorfon, etc., and scatter them in places where they often move.

2. Spray trichlorfon, deltamethrin and other pesticides around orchids, tables and flowerpots, or sprinkle lime or saturated salt water.

3. Pay attention to the cleanliness and hygiene in the greenhouse and remove the withered branches and leaves in time.