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Although the efficacy of smoke is high, it can also cause losses when it is not used. The formulation of the smoke agent must fully understand the nature of the pesticide and enable analysis and determination of the smoke forming conditions of the smoke agent. Otherwise, the decomposition of the pesticide will cause a large loss.
In addition, the discharge method of the smoke agent should also be noted. The correct method is to first prepare the smoke agent into a certain shape or in a suitable container, such as a paper smoke can. A smoke hole was left on the top of the tank, and the smoke was filled in the tank. When it was ignited, the smoke was quickly ejected from the top hole and all shot into the air. This use can prevent smoke from being absorbed by the ground and can promote the rapid spread of smoke.
In addition, it is also a very convenient method to use flue gas as a flake or block, but do not place the smoke or smoke block directly on the ground when using it. Instead, put the smoke flake on top of a wire holder. , about 30 centimeters from the ground. In this way, the smoke can be completely dispersed into the air and spread further.
The use of smoke method should master the law of air flow. Increased air flow occurs when the ground temperature is above air temperature. The sun shines on the ground during the sunny day and the ground temperature rises, so the updraft during the day is significant, especially at noon.
In the evening, when the ground is no longer exposed to sunlight, the ground begins to release heat, and the heat released is absorbed by the upper air, so this time there is a phenomenon that the ground temperature is lower than the temperature of the upper air, that is, the “inversion†phenomenon. The phenomenon of updraft disappears in the “inversion layerâ€. At this time, when smoke is applied, the smoke can form a relatively stable “cloud of smoke†that covers the ground and has a good effect. 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 cover" shape, combined with the phenomenon of reverse temperature, good smoke effects can often be obtained. At this point the smoke is released and the cloud will submerge the whole canopy and last for a period of time. In forests with high canopy density, orchards, and field crops with high growth rates and canopy closure, the smog method will achieve significant control effects.
How to use pesticide smoke agent correctly
The smoke agent is a powdery or spindle-like preparation made of a crude drug, a fuel, an oxidant, and a deflaming agent. When ignited, the pesticide can be heated to vaporize and condense into solid particles in the air. This pesticide is mainly used in forest, greenhouse and greenhouse plant pests and pests and warehouse pest control.