After being absorbed by plant roots, stems and leaves, pesticides can be transferred in plants or transformed into more toxic substances. Intoxication caused by insects feeding on poisonous stems and leaves is called internal absorption. Agents with internal absorption are called internal absorption agents, such as omethoate, monocrotophos, etc. This mainly refers to prevention and control Prick suction mouthpiece Sometimes, the mode of action of the used inhalants is classified as stomach toxicity. The ideal internal absorption agent mainly has the following processes:
Plants absorb chemicals → chemicals are transferred (or transformed into more toxic substances) in plants → they are metabolized into non-toxic compounds after a period of action.
The roots, stems and leaves of plants all have absorption functions, so there are many ways in which absorption occurs.
Endoscopic agents entering the plant body mainly conduct towards qualitative direction, that is, upward transmission along the direction of transpiration, so the effect of root application of endogenous agents is better than that of leaf application. In addition, the amount of downward transmission of agents for leaf treatment is less, and the internal agents should also be evenly sprayed.
Some insecticides on plant leaves can only penetrate into tissues quantitatively, but can not be transported in the body. This method is not inhalation, but Introgression 。
Main process of internal agent
