Prevention and control of diseases of domestic orchids

First of all, strengthen planting and breeding. Orchids need an environment with good ventilation, smooth drainage and moderate light. Take the domestic potted orchid as an example, the chosen orchid basin should be large pot bottom space, good air permeability and no stagnant water; the soil for growing orchids should be a mixture of pond mud and roasted soil, slightly acidic; orchid plants should be placed in a place with good ventilation and moderate light to reduce and prevent the occurrence of orchid diseases. When watering orchids, different water control should be carried out in different seasons, in order to keep the soil of the orchid basin a little moist, but avoid stagnant water.

Secondly, select a good variety to reduce the source of infection. There are many orchid varieties and there are great differences in disease resistance. Selecting good varieties and breeding seedlings and reducing the infection of disease sources is an effective way to control orchid diseases.

In addition, reasonable fertilization, timely replenishment of nutrients. The fertilization of domestic potted orchids should grasp the principle of "better lack than abuse, rather sparse than thick", and choose the appropriate season to apply fertilizer. When fertilizing orchids, do not apply insufficient or excessive fertilizer.

Finally, the most important thing is to eliminate diseased leaves and diseased plants in time, and to combine prevention and treatment. Whenever it is found that orchid leaves have leaf spot diseases such as black spot, anthracnose, white silk disease and so on, they should be cut off and burned in time or buried deeply. If rotten orchid plants are found, they should also be removed and dealt with. In addition, spraying orchid leaves with the same amount of Bordeaux solution or methomyl, carbendazim or water soaked in plant ash for 2 to 3 times every 10 days has a good effect on preventing the disease of orchids.