Knowledge of pest control of Phalaenopsis

The occurrence of Phalaenopsis disease is mostly due to the poor environment and sanitation, especially in the low temperature or insufficient sunshine Regular environmental cleaning and temperature and humidity control, rapid removal of disease plants can prevent most of the disease occurrence and transmission The diseases of Phalaenopsis can be generally divided into bacteria, mould, insect and environmental production The incidence and control methods are as follows: 1 At first, bacterial diseases are more than internal tissue reproduction, and then spread on the surface of leaves and plants The common symptoms are secretion of juice and decay, mostly due to excessive watering or contact between insects or plants Symptoms of black rot: it is a common disease of orchid The disease of Phalaenopsis usually festers to death, which is quite serious Prevention and control methods: special attention should be paid to greenhouse ventilation, and the temperature should also be properly reduced If there is any orchid, it is necessary to avoid spraying water to avoid prolonged disease The disease should be prevented by spraying fungicidal powder, and the symptoms of brown rot should be removed quickly: it can be said that it is a rather difficult disease to deal with in the blue disease, which initially produces light spots on the plant or leaf surface, then gradually becomes thick and turns to dark brown, and makes the plant wrinkle Brown rot is a very troublesome disease of Phalaenopsis It takes only one day from the initial onset to the occurrence of corrugation It usually begins to rot in the morning and in the evening Brown rot mostly occurs in the environment with high air humidity Zui is easy to get sick in spring and summer At this time, the air humidity is high and the growth of orchids is fast Once the orchids get sick, they are easy to get disease together with the surrounding orchids Control method: brown rot is easy to occur in the environment with high air humidity If any blue plant is found to be sick, stop watering, cut off the sick part, and apply bactericides If the disease is serious or the disease is suspected, remove or isolate the sick plant If other orchids are at risk of infection, they can be prevented by spraying fungicide, and the humidity should be strictly controlled in spring and summer, and the orchid garden should be kept ventilated and clean 2 The environmental humidity of mould was changed too much or the plant was damaged by the factors of soil and liquid fertilizer It is a common treatment method to reduce the EC Value of irrigation water and medium water In addition, grey mould on orchid petals also belongs to mould disease, which will form small spots on orchid petals The reason for this disease is that it is too wet or the relative humidity is too high, so it needs to be controlled by temperature and humidity 3 Blotch symptoms: most of the disease occurs on the leaves At the initial stage, round dark brown spots will appear on the leaves After the spots gradually spread Zui, they will cause the blue plants to rot it belongs to the bacterial disease, and most of the disease occurs in the low temperature, humid and poorly ventilated environment in autumn and winter Prevention and control method: this kind of disease often occurs in the environment of low temperature, humidity and poor ventilation The first thing to prevent and control method is to improve the humidity and keep the leaf surface dry In cold weather, only a small amount of water is used, and the ambient temperature is increased and ventilation is maintained, so as to make the moisture stagnate on the plant Symptoms of leaf blight: leaf blight will start to change color at the beginning of leaf tip, and then gradually spread to the whole leaf and the whole plant After Zui, the whole orchid is dark brown, and the injured orchid plants die hard This kind of disease is also caused by too humid environment It is necessary to pay attention to humidity control Prevention and control method: pay attention to the humidity control of orchid garden, and improve the ventilation If there is any doubt about the disease, it can be prevented by spraying fungicide The orchid that has been infected should be cut off and isolated as soon as possible to avoid the expansion of the disaster 4 Insect slugs, snails, slugs and snails are common pests of Phalaenopsis The common disease is that young plants are gnawed and produce small holes, which affect the appearance and growth of orchids The diseases of snails and slugs are very fast, which can cause a lot of blue plants to suffer in a short period of time Once it is found, insecticides should be used as soon as possible Lurid red spider lurid will bite on the leaves and produce deformation and discoloration, resulting in the appearance and growth of orchid adverse factors It can be controlled by insecticides 5 If the light is too strong and the temperature is too high, it is easy to fall off before the end of flowering If the root of orchid is not well developed, it may also be caused When the bud of Phalaenopsis falls off, we need to deal with the above two points It is not necessarily a problem of bacteria to produce spots in spotted orchids Sometimes, too much light or poor environmental adaptation will produce the same symptoms We need to pay attention to the changes in the environment, especially when the plants migrate