Pesticide expertise, essential for agricultural personnel

What are the stomach toxicity, contact toxicity, body absorption and fumigation of pesticides?

Pesticides in some important way can enter the body of pests to act on pests in a way and method is generally divided into stomach toxicity, poisoning, poisoning, endosorption and fumigation of therapeutic effect of four categories:

Gastrotoxicity occurs when pesticides are sprayed on crops or mixed with seeds or food. When insects feed, the pesticide enters the digestive tract with the food, and after being absorbed, the pesticide diffuses through the hemolymph to the nerves,RAMBO insect killer supplier muscles and other tissues, producing toxic effects.

2. Touch killing is the mode of action of pesticides sprayed on the surface or habitat of insects or plants. When the pest comes into contact with the pesticide, the pesticide enters the insect through its epidermis or sensory organs, or even the valve, and then spreads through the hemolymphatic circulation to targets such as nerves, muscles, or glands, resulting in the death of the pest by poisoning.

3. Suction is a way of action that can be absorbed into plant roots, stems, leaves and other tissues and kill pests feeding on the sap.

4. Fumigation refers to the action of certain chemical substances that can be easily volatilized to form a gas that enters the respiratory system through the insect's valve and then spreads to all parts of the insect's body, ultimately leading to the death of the pest.

What can be the difference between internal absorption and internal osmosis?

Internal uptake of an agent means that the agent can be taken up by the plant's body,VITFE insect killer manufacturer regardless of which part of the plant is used, and transported to all parts of the plant, along with the transmission of plant body fluids. The amount of drug transported to all parts of the plant is sufficient to kill that part of the pest and the drug does not impede the growth and development of the crop. Agents with the property of intrathecal conduction are called intrathecal pesticides. The endosorption of a pesticide means that the pesticide can only penetrate the crop skin and cannot be spread within the crop. The portion of the pesticide that kills the pest is ineffective without the pesticide.

What is the selective toxicity of pesticides?

Selective toxicity of pesticides refers to the difference in toxicity of pesticides to target organisms and non-target organisms or different pests. Agents with obvious selective toxicity are called selective insecticides.

What are the application methods of pesticides?

Pesticides are applied in a variety of ways and methods, including spraying, dusting, withdrawal, seed mixing, pouring, dipping,Chinese SLEEP COOL Insecticide spray fumigation treatment and so on. Depending on the type of these pests carried out, the application system techniques are studied differently, and the underground pest problem can be solved by choosing seed mixes, baits, poisoned soil, and so on.

What measures are taken to prevent and control the development of pesticide resistance?

When pests develop resistance to pesticides, it is important not to arbitrarily increase the dosage. We can prevent and delay the emergence of resistance by.

(1) Making full use of integrated control technology, guided by China's plant protection policy of "prevention as the mainstay, integrated control", and making full use of agricultural, biological, physical, chemical, and even all artificial ecological control measures.

(2) In the process of using pesticides, regularly alternating and alternating pesticides.

(3) Adopt the mixed use of pesticides, two or more of the mechanism of action and influence and the main mode of action as well as the use of different agents mixed system can be obtained to greatly reduce the rate of change of pest resistance occurs.

(4) Reduce the amount of medication, reduce the number of times of medication, and extend the time between medication.

(5) Use more selective pesticides, less use of pesticides with long residual periods.

(6) The use of synergists in pesticides can reduce the dosage, enhance the effect and delay the emergence of resistance.

(7) The sensitive period of pests is the key point of application, and it is necessary to choose the sensitive period of pests for application.

What is the best development period for pest control China?

In the control of pests, it is best to apply before the age of 3, the best time for the effect, the reason is that the body wall is thin, small body, small food, light damage, small range of activities, weak resistance, and the fat content of high-age larvae increased, organophosphorus pesticides decomposition, the higher the fat content, the stronger the resistance. Therefore, mastering the larval stage of the pest and timely application of pesticides is the key to improving the effectiveness of control.

pesticides pesticide resistance selective toxicity

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