Diaphragm type pulse damper / pulse damper, also known as pulsation damper and pulsation buffer, is a common component to eliminate pipeline pulsation and a necessary accessory of metering pump. Pulsation damper can smooth pipeline pulsation and water hammer caused by displacement pumps such as plunger pump and diaphragm pump. The gas is separated from the liquid in the pipeline by a corrosion-resistant diaphragm, and the pipeline pulsation is smoothed by the change of the volume of the gas chamber.
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How to identify rice blast prevention
Rice blast, also known as rice fever or ghost neck, is a serious fungal disease that can affect rice throughout its entire growing season. It primarily targets leaf and ear mites, causing significant damage to the plant's development. Leaf mites typically appear during the four-leaf stage and the tillering phase of seedlings. The disease manifests in two forms: acute and chronic. Acute lesions are elliptical, with dark green water-soaked spots on the leaves, and a thick layer of gray-green mold appears on the back, indicating an active outbreak. Chronic lesions, on the other hand, are spindle-shaped and may develop gray-green mold under high humidity, signaling potential spread of the disease. Timely application of **pesticides** is crucial to prevent further damage.
Thrips cause blackening of the rice stems, making them prone to breaking. The ear neck infection, also known as ear mites, affects the panicle and stalks, leading to brown to dark brown lesions. Early symptoms include white spikes, followed by increased sorghum-like growth and reduced grain weight. Grain mites result in brown spots or grayish-white to dark gray lesions on the grains, which is a sign of a fungal infection. The pathogen overwinters in infected straw and grains, with spores surviving for more than a year in stored material. Spores are dispersed through rain and wind, and the disease thrives under conditions such as temperatures between 25°C and 28°C, excessive moisture, insufficient sunlight, and poor management of fertilization and irrigation. Susceptible rice varieties are especially vulnerable to infection.
Preventing and managing rice blast requires careful and rational use of chemical agents. Accurate forecasting and timely intervention are essential for effective control. According to the **China Pesticide Network**, the most effective treatments for rice blast include Fuji 40% emulsion and triadimefon 20% wettable powder. These should be applied at a rate of 50–100 grams per 100 kg of water. During the booting and heading stages, when rainfall is frequent and up to 1% of the flag leaves show disease spots, it is recommended to apply the treatment twice—once during booting and once during heading. When spraying, ensure that at least 100 kg of liquid is used per mu to achieve even coverage. Pay special attention to both sides of the leaves and the upper and lower parts of the plants to avoid missed areas and ensure thorough protection against the disease.