Effects of pathogenic bacteria or insect phagocytosis

All living things will suffer from the phagocytosis of various pathogens or insects, of course, Guolan is no exception. In the process of growth and development, it encounters various kinds of abnormal environmental effects or the harm of pathogens and insects, which results in abnormal changes of chemical substances, abnormal physiological reaction, metabolic flow, storage and other functions in the orchid itself. the plants of the national orchid are uncoordinated and irregularly apply their existing nutrients, affecting the future growth of the national orchid. The occurrence of the disease has a certain root cause. The pathogen first arrives at the plant, causing the plant to infect and cause the disease.

The cause of plant infection is closely related to negligence in cultivation, management and operation. Generally from the seedling propagation, media, tools, equipment, water, air and other transmission, the dormant body exists in this source waiting for the opportunity to harm, wait until the right time and sufficient nutrition sources, that is, will invade the plant infection. And a large number of reproduction, expansion, and growth, resulting in disease symptoms and serious harm to plants.

The types of diseases that can cause orchid diseases can be divided into abiotic media, temperature, light, air, water, nutrient elements and human factors, which cause abnormal changes and affect the reproduction and growth of plants. Biologically transmitted diseases can be divided into:

(a) viral viruses, such as orchid rosette virus and East Arabian mosaic virus.

(B) bacteria such as soft rot, bacterial brown spot.

(C) Fungi such as algae, blight, ascomycetes and powdery mildew. Basidiomycetes-white silk disease, Sclerotinia sclerotiorum, root rot; incomplete fungi-anthracnose, leaf spot, scorch tail disease, etc.

(d) four kinds of nematodes.