Lamination After the leeks have just been harvested, there is a rich leek odor over the leek field, and it is easy to attract large numbers of adults to spawn. Therefore, after the leek is harvested, the plastic film should be covered with leeks on the surface of the leek immediately for 3-5 days. After the leek has healed, the odor disappears and the film is peeled off. Sprinkle After the leek is harvested, it is timely sprinkled with a layer of vegetation ash to prevent adults from spawning, which is beneficial to extermination. Spray In the adult emergence period, the adult insects can be directly killed by spraying 50% phoxim 1000 times solution or 2.5% deltamethrin 3000 times solution. Irrigation In the event of severe damage, when the tip is found to be yellow, soft and gradually lodging on the ground, use 50% phoxim EC 800 times to irrigate the roots, or combine watering to top ammonium bicarbonate per acre. -20 kg, or 1 kg of copper sulfate per acre and 200 kg of water to water the root of leeks, can effectively kill fleas.
It is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs. Its aim is often to find a source of a disease or to exclude pathology. The practice of examining pregnant women using ultrasound is called obstetric ultrasound, and was an early development and application of clinical ultrasonography.
Ultrasound are sound waves with frequencies which are higher than those audible to humans (>20,000 Hz). Ultrasonic images, also known as sonograms, are made by sending pulses of ultrasound into tissue using a probe. The ultrasound pulses echo off tissues with different reflection properties and are recorded and displayed as an image.
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Prevention and control of four coups