How to treat insect pests

All flowers and plants have nutrients for different kinds of insects, and orchids are no exception. There are two kinds of pests of orchids: orchid leaf and orchid root. Pest control should be based on prevention, adequate sunshine, proper moisture, ventilated environment, strong grass growth, pests are very difficult to harm, and vice versa. We should also master some basic knowledge of pest control. There are mainly scale insects in the upper part of the basin, which are harmful to orchids. They are divided into two types: one is the shield scale, the very fine larvae can be seen wriggling in the "V" shadow of the leaf base when the larvae are naked, but they can quickly form wax and attach to the shade of the leaf base, and the leaf juice is absorbed by needle pipette to enlarge the shield shell and thicken the shield shell. If found later, the whole pot leaf base will be covered with this worm. This kind of shell insect is more difficult to kill, and the effect of using dimethoate is better, but it is toxic and should be protected by users. According to the practice in recent years, "Huakang No.1" produced by Huayi Company in Chengdu, Sichuan Province has a good effect on killing scale insects (effective against many kinds of pests). After killing insects, we have to scrape off the waxy shell in order to look. It should be noted that after a certain period of time, the wax will fall off on its own.

The other is the powder medium, which is often attached to the base of the orchid plant in the shape of a white cotton ball, and a bright red blood-like substance overflows when pressed with the fingers. This insect propagates quickly, has a moist basin surface, and can appear in large numbers at the base of bluegrass in three or five days. It can be killed by spraying omethoate and trichlorfon two or three times.

In addition to shell insects, there are also common mites. This kind of pest is very easy to occur due to the lack of cleanliness and hygiene in Van Lanchang. Because the mite can crawl, it will soon damage the whole grass, especially the new part of the base. When controlling pests, a hose sprayer should be used to evenly spray trichlorfon and trichlorfenac on the basin surface, the front and back of the leaves, and the basin frame should also be sprayed to prevent escaped mites from escaping.

There are also aphids that harm orchid leaves. Aphids usually occur in Huangmei days, which are too wet. Most of the damage sites are in Lanwei. Because aphids have green cover color, they must be checked frequently before they can be found. Aphids are intractable pests, which are difficult to be eliminated by general pesticides. According to observation, it is better to use malathion, fish rattan essence, lindane, dimethoate chloride and so on. "Huakang No.1" is also the drug of choice. Where there are many ants on the orchid leaves, there must be aphids.

The damage caused by snails and snails often occurs in rainy and wet weather. In the dark night with poor ventilation and ventilation in the orchid field, these insects crawl in the orchid basin to chew tender grass, which not only directly harms the bluegrass, but also causes pollution. These two kinds of pests travel day and night, and the effect of spraying potion is poor. The harm of these two kinds of pests can be avoided by spreading them on the basin medium.

Although rats are not pests, they can also do harm in early spring and flowering, eating buds and buds. Do not raise cats except rats, contact with cat urine, young orchid will wither, and cats run and jump in estrus, it is very easy to overturn the orchid basin. The best way to get rid of rats is to withdraw Weimudan once a month around the Lanchang environment. Savi Milu Dan can also prevent snakes and toads, sprinkle on the basin, and get rid of ants and soil pests, is a very simple way.

For nematodes, earthworms, centipedes, mole crickets, ants and other pests in the soil, it is best to use Fu Mu Dan to remove and apply in the basin, and the medicine should be killed with watering and infiltrating into the soil.

The best way to deal with insect pests is not to use soil as cultivation material, not to grow green grass, and not to use organic fertilizer. Of course, if you have the conditions to run an orchid farm, if you have all the facilities, you will not reject the use of orchid mud to grow orchids, because this has been experienced for hundreds of years, and it is still good to breed orchid seedlings with soil and shredded tiles. (Guan Wenchang, Zhu Hexing)