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It belongs to chemical information, biological control. The principles of biology are applied.
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Floor? Book? Make use of insect-to-insect communication.
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Systemic chemical pesticides are not only suitable for pest control.
Analysis: Systemic pesticide refers to the application of pesticides, after a part of the plant is exposed to pesticides, the liquid medicine enters the leaves of the plant through the osmotic effect of leakage (swelling and decay and osmotic pressure between the inner and outer cells), and the liquid medicine can reach all parts of the plant with the water circulation in the plant. In insecticides, aphids feed on the branches and leaves of crops, and the liquid is transmitted through the sap of the plant.
So aphicides are basically systemic in nature. Glyphosate in herbicides is also a systemic pesticide, and the weeds die 5-7 days after the application of the herbicide, and the roots of the weeds are also killed through the conduction of water in the plant. So systemic chemical pesticides are not only suitable for pest control.
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According to my understanding, it is not a chemical control, it should be a combination of biological and physical pest control.
Extrasexual hormones, that is, pheromones, are synthetic pheromones of specific species, added to the trap or self-adhesive, released slowly, affecting the behavior of pests, gathering according to the guidance of pheromones or pheromones to induce males to seek mating, etc. Cooperate with self-adhesive boards or insect trap containers to hunt and kill specific pests.
In this process, synthetic exohormones are used to imitate the release of pheromones by the pests themselves, which has an impact on the behavior of the pest population, and should belong to biological control.
No pesticides are used in this process, and no toxic substances remain, so it is not a chemical process.
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The use of insect attractants to control pests is considered a form of biological control.
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In order to prevent and or less pest resistance to the emergence of + how scientific chemistry should be used.
1) In the process of pest control, do not rely solely on chemical pesticides, but take physical and biological measures to carry out comprehensive control, so that they can cooperate with each other, learn from each other's strengths, and do not use chemical pesticides or use less. (2) Do not use a single agent for a long time in rotation to cut off the formation of resistant populations in the biota. Agents with different mechanisms should be used as much as possible, and drugs should be rotated.
For example, organophosphate preparations, pyrethroid preparations, and carbamate preparations are used in rotation. Systemic fungicides are easy to cause anti-filial piety and should be used in rotation with mancozeb, inorganic sulfur preparations and copper preparations. Stone sulfur mixture does not develop resistance to pests and can be used in rotation with multiple types of pesticides.
3) Mixed drugs are mixed with two agents with different modes of action and mechanisms, such as the mixture of Rhizopus and mancozeb, and the mixture of organophosphorus preparations and pyrethroid preparations, which can slow down the production of antibiotic properties for pests. (4) Intermittent use or discontinuation of pesticides that have produced resistance to pesticides when a pathogen or pest has developed resistance to a pesticide, if the use of this pesticide is stopped for a period of time, the resistance it has produced will be reduced, and after a number of years, its resistance can basically disappear. (5) Adopt correct pesticide application techniques for pests and diseases.
1: Yes. 2: Encyclopedia.
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You can also eat some.
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