The smoke agent is a powder or ingot preparation made of a crude drug, a fuel, an oxidant, and a flame retardant. When ignited, the pesticide can be heated and vaporized, and condensed into solid particles in the air. This pesticide is mainly used for the control of pests and diseases of forests, greenhouses and greenhouse plants as well as warehouse pests. Led Smd Strip Light,Led Smart Strip Light,Led Flexible Strip Light,Rgb Led Smart Strip Light Shenzhen Huangtai Photoelectric Co.,Ltd. , https://www.ht-led.com
Although the effect of smog is high, it can also cause damage when it is not used. To prepare the smoke agent, it is necessary to fully understand the nature of the pesticide and to analyze and determine the smoke formation of the smoke agent, otherwise the decomposition loss of the pesticide is great.
In addition, the method of placing the smoke agent should also be noted. The correct method should first prepare the smoked agent in a certain shape, or in a suitable container, such as a paper smoking can. A smoke hole is left at the top of the tank, and the smoke agent is filled in the tank. After the ignition, the smoke is quickly ejected from the top hole and all are injected into the air. This usage prevents smoke from being absorbed by the ground and can cause the smoke to spread quickly.
Also, it is a convenient method to make the smoked agent into a sheet or a block. However, do not place the smoke or smoke block directly on the ground when using it. Place the smoke piece on top of a wire support. , about 30 cm from the ground. In this way, the smoke can be completely dispersed into the air and further diffused.
The use of the smoke method should master the law of air movement. An updraft is generated when the ground temperature is higher than the air temperature. During the sunny day, the sun shines on the ground, causing the ground temperature to rise, so the updraft during the day is significant, especially at noon.
In the evening, the ground is no longer exposed to sunlight, the ground begins to radiate heat, and the released heat is absorbed by the upper air. Therefore, the phenomenon that the ground temperature is lower than the upper air temperature occurs at this time, that is, the phenomenon of "inverse temperature". The updraft phenomenon disappears within the range of the "warm layer". At this time, when smoke is applied, the smoke can form a relatively stable "smoke cloud", covering the ground, and the effect is better. Therefore, the application of smoke in the evening can avoid the interference of updrafts. When the canopy of the crop grows densely and forms a "crown cap" shape, combined with the inversion phenomenon, a good smoke effect can often be obtained. At this point, the smoke is applied, and the cloud cloud will drown the entire canopy and last for a while. In forests and orchards with high canopy closures and field crops with high growth and canopy closure, the smoke method will achieve significant control effects.