Distinguishing the three diseases of fungal diseases, bacterial diseases and viral diseases is very important for prevention and treatment, especially for the prevention and treatment of chemicals. Different pesticides can prevent and cure different diseases, and fungicide-killing agents may not be able to prevent viruses, and can cure bacteria without controlling bacteria. Other Temperature /Measuring instruments Other Temperature Measuring instruments,Household Portable Electronic Scale,Hanging Digital Crane Scale,Electronic Digital Display Vernier Caliper,Digital Depth Vernier Caliper Chengdu Augus Science Technology Co., Ltd. , https://www.vluckyaugus.com
The first is to see the type of symptoms. Usually we divide the changes of sick plants into five major types, which are decay, necrosis, discoloration, wilting, and deformity. Due to the variety of fungi, different fungi can make the above five types of diseases, the most common of which are necrosis and rot, such as corn leaf spot, wheat leaf blight, Chinese cabbage black spot and other shapes of leaf spot, necrosis Blight and root rot are formed on the roots or stems; bacteria usually destroy the cell wall, causing extracellular substances in the cells or blocking the transport of water and nutrients in the plants, so mainly causing symptoms of decay and wilting; Plants generally do not kill plants immediately, mainly to change the growth and development of plants, causing changes in the color or shape of the plants. We call them discolored and deformed.
Because the fungi that can make crops sick are some filaments, bacteria are single cells, viruses are molecular organisms without cell structure, their metabolism and temperament are also very different, and the symptomatic agents are different. We met a lot of friends who reported that the prevention and treatment were ineffective, and the inquiries were often made because they did not distinguish what was the disease. Bacterial leaf spot disease occurred on the tomato, but the fungicidal carbendazim and methyl thiophanate were sprayed incorrectly, so that more drugs were not effective.
The same is leaf spot, how to distinguish it? Since the bacteria destroy the cell wall and cell membrane of the plant, and the intracellular substance infiltrates into the cell, it becomes transparent, so the lesion of the bacterial disease is like water immersion or oil immersion, and the edge is somewhat transparent. Under wet conditions, bright yellow beads can be seen at the site of the disease, which is a bacterial pus. Fungal diseases can grow some mildew or small black particles, and the surface of the viral lesions is not long. Due to differences in the way they are transmitted, their distribution in the field will vary. Bacteria and water are closely related. The distribution of bacterial diseases is often related to water, flooding and raindrop splashing; viral diseases are often related to the activities of poisonous insects. Observing the distribution of disease fields, you can also indirectly speculate the types of diseases.
Both fungi and bacteria can cause rot, how to distinguish them? The rot caused by bacteria often produces a lot of water, rotten into a mud, and the rot caused by the fungus is more dry than the dry, often growing in various colors of mildew or small black spots, small black particles. Another difference is that the rot caused by bacteria gives off odor, the fungal disease has no odor, and there is a smell of mildew or even fermentation.