First, it is not suitable to prepare pesticides in living water. Because there are many impurities in living water, it is easy to block the nozzle of the sprayer with its dispensing, and it will also destroy the suspension of the drug solution and cause precipitation.
Second, it is not advisable to increase the amount of water at will. Excessive addition of water will reduce the concentration of pesticides. Spraying on crops leaves only a very small amount of pesticides, which is not enough to kill pests, and some pesticides may even be completely ineffective. Excessive addition of water will also cause the loss of pesticides and lead to environmental pollution. Therefore, when formulating pesticides, we must strictly control the amount of water added according to their use concentration range.
3. It is not advisable to increase the amount of pesticides at will. Before the pesticides are allowed to be produced and sold, they must go through rigorous field efficacy tests, and then determine the actual usage data such as dosage, time and frequency of application. Therefore, the application of pesticides in accordance with the amount specified in the instruction manual can achieve the control effect. Increasing the dosage not only increases the investment, but also causes crop damage, increases pesticide residues in agricultural products, and increases environmental pollution.
4. It is not advisable to spray pesticide crops during the flowering period. The tissues are young, their stress resistance is weak, and they are prone to pesticide damage. Therefore, they must avoid the flowering period when spraying.
Fifth, it is not advisable to spray pesticides before harvesting. The remaining period of high-efficiency and highly toxic pesticides is generally about 60 days, and the remaining period of high-efficiency and low-toxic pesticides is about 15 days. Therefore, it is forbidden to apply pesticides before harvesting vegetables to avoid food poisoning.
6. It is not advisable to spray from top to bottom. When spraying, the spray should be started from the lower leaves of the vegetables, and the spray head should be directed upwards, focusing on the bottom of the blade, and the front of the blade does not need to be sprayed. Because there is usually more medicinal solution falling from the leaves of the plant to the front of the leaf than that of the back of the leaf, only in this way can a good control effect be achieved.
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Camera, also known as computer camera, computer eye and electronic eye, is a video input device, which is widely used in video conference, telemedicine and real-time monitoring. Ordinary people can also talk and communicate with each other through the camera on the network with video and voice. In addition, people can also use it for various popular digital images, video and audio processing.
Smart cameras are also called smart security cameras. Security is one of the main functions of smart cameras at present. When there is something happening at home, the camera will immediately push a message on the mobile phone to remind users. According to the statistics of the big data of Aurora, as of February 2019, the number of users of smart camera APP in the industry was 49.81 million, an increase of 44.9% over the same period last year. This shows that in the past year, people's demand for remote home and store watching has shown an upward trend, and smart cameras have also become a common household device.
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