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[Chemical Knowledge]：Uncover the principle of herbicides, protect farmland more effectively!

Read： 666 Time：14months ago Source：Transform the World with Simplicity

Overview
of 1. Herbicides
herbicide is a widely used in agriculture, forestry, horticulture and other fields, for the control or removal of harmful weeds. Herbicides can be divided into non-selective herbicides and selective herbicides. Non-selective herbicides will kill both target plants and non-target plants, while selective herbicides will only kill target plants and will not affect non-target plants.

2. Herbicide Principle

Herbicide works mainly by destroying certain specific physiological processes during the growth of weeds, rather than by directly killing weeds. Common principles include the following:

1. Establish a difficult to overcome the barrier: the chemical substances in herbicides will inhibit the specific enzyme activity necessary for plant growth, so that the plant can not synthesize enough certain life substances to block its growth process.

2. Kill plant cells: Some chemicals in herbicides can kill plant cells by invading them and destroying them, thereby preventing their growth and eventually causing the death of the plant.

3. Destroy the internal balance of plants: Many herbicides have toxic effects on plant growth, which can destroy the internal balance of cells and cause the cells to lose their original functions.

3. Application Precautions

1. Use in strict accordance with the instructions: Herbicides must be used in accordance with the instructions in the use method, and at the same time strictly control the dosage to avoid phytotoxicity and damage to non-target plants.

2. Timing: The timing of herbicide use is very important. In general, the best time to spray the herbicide is when the grass band appears, not when the plant is already mature. In addition, the use of herbicides in certain climatic environments also requires extreme caution.

3 to prevent environmental pollution: the use of herbicides at the same time, need to pay attention to prevent pollution of the surrounding environment. It is not advisable to use machines when weeding, so as not to cause damage to the surrounding environment and non-target plants, and try to choose windless weather and use after rain to reduce the damage of herbicides to the surrounding environment.

4. summary
The principle of
herbicide is one of the important weapons to protect farmland, and it is also a kind of agricultural science and technology widely used at present. When using herbicides, we need to pay attention to factors such as dosage, use time, coating method, wind size, weather and environment. It is hoped that this article can help write ning to understand the principle of herbicides, better protect farmland, and better integrate agricultural science and technology into the development of modern agriculture.