Mr. Li from Shandong shared that the medicinal plants were grown in the Jiangxi production base, where they are protected from the wind. However, a disease developed on the stems, leading to the death of the entire plant. He wants to know what the disease is and which pesticide he should use for prevention. Annisomelesindica, also known as parsnip, is used as a whole herb. During field planting and production, diseases can occur. Based on the disease samples sent to the laboratory of the Institute, a detailed analysis was conducted. The diagnosis revealed the following: (1) Disease symptoms: In the seedling stage, there is a water-soaked soft rot at the base of the stem, appearing dark brown. The upper part of the stem tends to fall over, and the seedlings wither. On the leaves, the lesions are nearly circular with a yellow-green border and a dark brown center. The stems show lesions at the base, along the stem, and on the branches. Initially, these lesions appear water-soaked, then develop into brown or dark brown streaks, causing the leaves above the affected area to wilt rapidly. (2) Pathogen identification: The disease samples were isolated and cultured under sterile conditions. After 4 days at 25°C, white hydatiform hyphae were observed. Under the microscope, filamentous chromophoric cysts and oval-shaped sporangia were visible. The preliminary identification indicates that the disease is caused by an infection of Phytophthora species. According to China Pesticide Network, here are some specific preventive measures you can take: (1) Agricultural control: Practice crop rotation, deep plow the fields, remove infected plants, drain water promptly after heavy rain, and avoid excessive humidity in the field. Collect seeds from healthy areas and mix them with a new high-fat film to isolate bacteria and improve germination rates. Apply nitrogen fertilizer appropriately, avoid overplanting to ensure good ventilation and light penetration, and implement other proper cultivation techniques. (2) Chemical control: It is recommended to use a 400-times diluted solution of the new high-fat film mixed with a general tree guard spray before or during the early stages of the disease. This helps disinfect the area, block the virus's replication and spread, and protect the plants effectively. Hydraulic Diaphragm Metering Pump
Hydraulic Diaphragm Metering Pump/Hydraulic dosing pump, is characterized by the diaphragm reciprocating motion in the hydraulic work chamber, which means: the working chamber of the pump liquid end is caused from the diaphragm, but the diaphragm periodic motion is from the plunger reciprocating motion in the hydraulic work chamber, the accuracy of this dosing will be + 1%. The diaphragm is durable, and the component check valve ensure accurate ball control which in order to provide consistently accurate flow control through the pump, also it provide easy maintenance. The diaphragm technology provides high standard of safety, this eliminate the risk of leakage, then the pressure relief valve in the hydraulic end which to protect the overload problem. Under the different situation, hydraulic diaphragm metering pump can be joined together in efficient configurations. The hydraulic diaphragm metering pump usually used in chemical and petrochemical, pharmaceutical, cosmetic, food production and packaging industry.
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