The taro disease is a fungal disease, commonly known as cockroach, which usually occurs during the annual rainy season and midsummer. Growers should inspect carefully the fields of Putian. Once they have found lesions, they must immediately take measures to eradicate the disease at the initial stage to prevent the spread of the disease.
Symptoms: When the leaves occur, the leaf spot on the back of the leaves is the most obvious. There are conidiospores on the periphery of the spots. The lesions appear white and moldy. In severe cases, the lesion gradually rots and ruptures; until the leaves only have residual main veins, like broken umbrellas. Similarly, when the petiole occurs, dark brown long oval lesions often form, causing the leaves and petioles to turn yellow until withered; when the bulbs occur, it will cause the entire steamed bread to rot and even destroy.
Prevention:
1, agricultural measures prevention. 1 Use uncultivated alfalfa when planting. 2 The rotation will be carried out for more than three years. Implement crop rotations with rice, corn, peanuts, sugar cane and other crops. 3 Increased application of phosphorus and potassium fertilizers and farm organic fertilizers, to promote solidification of the leaf, petiole tissue cells, enhance plant resistance to disease. 4 Strengthen the management of the field, clear the gutter drainage in the rainy season, and prevent waterlogging in the fields.
2, pharmaceutical control. 1 The plants were treated with 1000-fold dilution of enemy pine, with 110 kg per acre, and once every 10 to 12 days, continuous application of 3-4 times, which can effectively control the occurrence of the disease. 2 Spray Bordeaux mixture. Its production method is: 0.5 kg of copper sulfate, lime and turpentine, dissolved with a small amount of water and mixed together, and then added 75 kg of water to spray the whole field, spray once every 7 to 8 days, and continuously spray 2-3 times. The control effect can be over 90%. 3 with the strong strength of 80 ml of geropentine 100 mg, 55 kg water spray control.
We may have ever heard of the Bullet Fixed Focus Camera/ Fixed Focus Bullet Camera HD/ Bullet Fixed Focus Journal Camera/ Fixed Focus Bullet Camera IR/ Fixed Focus Bullet Surveillance Cameras/ Fixed Focus Analog Bullet Cameras, so what is the Bullet Fixed Focus Camera? We know that the Bullet refers to the camera shape, so what about the Fixed Focus? Actually, the Fixed Focus refers to a type of the camera lens. Today let me introduce the camera lens for you.
The camera lens is the key equipment of the video system. The lens' quality (index) directly affects the overall index of the camera. The lens is equivalent to the lens of the human eye. As you know, if there is no lens, the human eye cannot see anything. That is to say, if there is no lens, then the output image of the camera will just be white without any clear image output; which is consistent with the principle of our home cameras.
Actually, there are many classifications for the camera lens. Today please let me introduce one classification for you---the classification according to the structure.
1. The fixed focus lens with the fixed aperture
The lens has only one focus adjustment ring that can be manually adjusted. Rotating the ring left and right can make the image on the CCD target surface clearest. There is no aperture adjustment ring, so the aperture cannot be adjusted, and the luminous flux entering the lens cannot be changed by changing the lens factors, but can only be adjusted by changing the illuminance of the shooting site. The structure is simple and the price is cheap.
2. The fixed focus lens with the manual iris
Compared with fixed focus lens with the fixed aperture, the fixed focus lens with the manual iris has an extra aperture adjustment ring. The aperture range is generally from F1.2 or F1.4 to fully closed, which can easily adapt to the illuminance of the shooting site, and the aperture adjustment is done manually. The illuminance is uniform and the price is cheap.
3. The fixed focus lens with the automatic iris
Compared with the fixed focus lens with the manual iris, the fixed focus lens with the automatic iris has an extra gear-driven micro motor on the iris adjustment ring, and a 3 or 4-core shielded wire is drawn from the drive circuit, then connected to the camera's automatic iris interface seat. When the luminous flux entering the lens changes, the charge generated by the CCD target surface of the camera changes accordingly, thenthe video signal level changes, and a control signal will be generated and transmitted to the automatic iris lens, so that the motor in the lens can perform the corresponding rotation to complete the task of resizing.
4.The electric zoom lens with the automatic iris
Compared with the fixed focus lens with the automatic iris, the electric zoom lens with the automatic iris two extra micro motors. One motor is connected with the zoom ring of the lens, and can control the focal length of the lens when it rotates; the other motor is connected with the focus ring of the lens, and it can complete the focus of the lens When it rotates with control from the former motor. However, due to the addition of two motors and an increase in the number of lens groups, the size of the lens has also increased accordingly.
All in all, it would be helpful to know about the camera lens if you want to know more about the Bullet Fixed Focus Camera and the whole video monitoring field.
Bullet Fixed Focus Camera, Fixed Focus Bullet Camera HD, Bullet Fixed Focus Journal Camera, Fixed Focus Bullet Camera IR, Fixed Focus Bullet Surveillance Cameras, Fixed Focus Analog Bullet Cameras
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