In agricultural planting, grass damage is the most common. Everyone uses herbicides to control grass damage. However, if the herbicide is used improperly, some harm will occur. Today, this article introduces the harm caused by improper use of the herbicide acetochlor.
In the traditional pesticide industry, acetochlor is a widely used herbicide. Developed by Monsanto in the United States in 1971, it is one of the most important herbicides in the world and one of the most widely used herbicides in China. Due to the potential hazard to the human body due to the daily intake tolerance of acetochlor, the use grace period of existing stocks cannot exceed 12 months. Suitable for corn, cotton, beans, peanuts, potatoes, canola, garlic, tobacco, sunflower, ramie, green onions, etc. It was successfully developed by Monsanto Company in the United States in 1971. It is one of the most important herbicides in the world and one of the most widely used herbicides in China. The principle of killing weeds is to destroy the chlorophyll and soluble protein in the gramineous plants, so that the weeds gradually lose green death in a short time, and achieve the purpose of killing weeds. Wheat, which is also a gramineous plant, although it is more resistant to acetochlor than weeds, excessive application of acetochlor can also cause damage to wheat. The seedlings are flaky yellow, dry leaf tips, heavy dead seedlings, and wheat can not safely overwinter.
Acetochlor activity is affected by soil type, moisture, organic matter content and soil temperature. The soil temperature is low, the organic matter content is high, the rainfall is low, and the dosage in clay areas is generally 1-1.5 times higher. The amount of sandy soil should be reduced accordingly, preventing large rainfall from bringing a part of the agent that is not completely adsorbed by the soil particles to the root layer, and contacting the young shoot roots may lead to phytotoxicity. After the wheat is harmed by acetochlor, the field is spotted. The symptoms of the tablets are yellow, the color of the leaves is yellow and green, the leaves are yellow and green, the leaves are gradually dry from the tip of the leaves, the roots are black, in case of low temperature, the symptoms of cold damage or freezing damage, the leaves of the light are dry, the dead are dead, the wheat can not Safe wintering. This is because chlorophyll and soluble proteins in wheat plants are destroyed and their ability to adapt to the environment is reduced. Acetochlor will naturally decompose in about 90 days under natural conditions, and the natural decomposition time of acetochlor in the peanut field under the mulch film is prolonged, increasing the risk of wheat being harmed. In addition, after the application of acetochlor in crops, the crops may show chlorosis, slow growth or shrinkage, but the growth will be resumed with increasing temperature, generally not affecting the yield.
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