Peanut bacterial wilt symptoms and prevention

Peanut bacterial wilt is called "green disease," "dead seedling," "peanut pod," and so on. It is a bacterial disease. Vascular damage to peanuts can quickly kill a large number of plants in a short period of time. Peanut bacterial wilt can occur from the seedling stage to the whole reproductive period of the harvest, and it usually begins before and after flowering. The flowering stage is the peak period of onset. The pathogens mainly infect the roots, causing the roots to discolor and soften, the vascular tissue turning dark brown and extending from the bottom up to the top of the plants. After transection of the diseased area, squeezed by hand, it can be seen that turbid milky white bacteria flow out. The susceptible plants exhibited the first and the second leaves of the main stem at the first stage of the dehydration and wilting. After the potential expansion, the leaves of the whole plant lost water and wilt from top to bottom, and the leaves were dull, but they were still green. It takes 7 to 15 days from the time the plants are susceptible to death. The pods and pedicels on the plants are brown and rot.
The pathogen can survive in the soil for 3 years to 5 years. The pathogenic bacteria that overwinter in the soil are the main source of infection, and the field diffusion mainly depends on running water and tools. High temperature and high humidity are the dominant factors in the occurrence of diseases.
Control methods: The most economical and effective method for controlling bacterial wilt is the selection of disease-resistant varieties. However, the disease resistance of the varieties is not consistent with each other because of different locations. Therefore, trials should be conducted before large-scale introduction. Rotation of crop rotation can also effectively control the occurrence of bacterial wilt. Because of the wide range of hosts of peanut bacterial wilt, we must consider the arrangement of cornices in rotation, and it is more appropriate to use sweet potatoes, corn, millet or the method of using paddy and dry crop rotations. The cycle is 3 years - 5 years. The drug can be seeded with 25% enemy-bactericide, or with 1000-fold solution, or soaked or rooted with streptomycin 200 mg/kg-400 mg/kg (200 ppm-400 ppm).

[Composition]

The main component of this preparation is human immunoglobulin, which is prepared by cold ethanol fractionation of human plasma from healthy donors. The manufacturing process contains a step to remove anticomplementary activity and a dual viral inactivation process. It contains a suitable amount of glucose or maltose as stabilizer (see table below), but does not contain any antiseptic or antibiotic. The distribution of IgG subclasses is close to the serum level of normal subjects and maintains the bioactivity of Fc fragment of IgG.

[Indications]

1. Primary agammaglobulinemia, such as X-linked hypogammaglobulinemia, common variant immunodeficiency diseases, immunoglobulin G subclass deficiency, etc.

2. Secondary immunoglobulin deficiency diseases, such as severe infection, septicemia of newborn, etc

3. Autoimmune diseases, such as primary thrombocytopenic purpura, Kawasaki disease

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