Pesticides can be used to kill fungi, insects and other organisms that harm crops. Pesticides are high-tech, highly targeted agricultural production materials. It can effectively control crop pests and diseases and ensure a bumper harvest. However, improper use can also cause side effects such as pesticide residues, environmental pollution, damage to ecological balance, crop phytotoxicity or poisoning accidents to users. I will tell you some of the precautions in the use of pesticides:
At present, there are many varieties of pesticides used in China, which are classified into fungicides , insecticides, acaricides, nematicides, herbicides, defoliants, plant growth regulators and rodenticides. Chemically synthesized pesticides (variety) must be processed into certain dosage forms to form different specifications of preparations or mixed preparations to be commercially available commercial pesticides. In addition, in order to supplement the domestic market and improve the variety structure, the state has approved the import of some new pesticide varieties. Therefore, there are many varieties in the pesticide market, which are dazzling and difficult for users to choose.
The pesticide used on crops is an agricultural poison, which has selectivity for different organisms. For example, pesticides can be divided into contact agents, stomach poisons, systemic agents and fumigants according to their mode of action; plant growth regulators , It is a kind of pesticide used to regulate plant growth and development, including synthetic compounds and natural plant hormones extracted from organisms. The most obvious biological activity of gibberellic acid is to stimulate the growth of plant cells, make plants grow taller, and the leaves grow. . The most prominent physiological effect of gibberellic acid is to promote stem elongation and induce long-day plant twitching and flowering under short-day conditions; acaricides are divided into killing insects, only killing, sputum, and only The bactericide is divided into a protective agent, a systemic therapeutic agent and a protective therapeutic mixture; the herbicide is divided into a stem and leaf treatment agent and a soil treatment agent. The same insecticide, is not versatile for all kinds of pests, each agent has its own range of control, such as anti-Riwei is used to control aphids, but the activity of cotton aphid is very poor; tetrazine (Abo Luo) Controlling the fruit tree red spider, only the activity of the egg is high, and it is not effective for Cheng and Ruo. The efficacy of a drug is also staged. When a new drug is just put into use, it tends to work better. With the heavy use, the resistance of pests and other harmful organisms will gradually increase, and the control effect will decrease. In the treatment stage of controlling a certain pest, the first drug and the later drug have different pharmacodynamic effects. For example, for the cotton bollworm, in the hatchery period of the first generation of the cotton field, before the larva 3 years old, the drugs generally used for controlling the cotton bollworm are Good control, but when the larva reaches 4 to 5 years old, it is difficult to achieve satisfactory efficacy with any agent.
Pesticide is a technical product of informed consumption and needs to be used in strict accordance with the instructions on the instructions or on the bottle label. In other words, people should first use the full performance of the performance characteristics of the selected pesticides. Blind use not only fails to achieve the purpose of effectively controlling pests and diseases, but also brings side effects such as phytotoxicity to plants, pollution to products and the environment. What problems can I find out through the instructions?
(1) Precautions: In the use of pesticides, it is considered that the effect of a certain pesticide is good, and it will be used for a long time. Even if the summary is found to reduce the effect of pest control, the variety will not be changed. The pests and diseases have developed resistance, and as a result, the larger the dose, the higher the resistance of the pests, resulting in a vicious circle.
(2) Mainly for the characteristics of the drug, to remind people of the problems that should be paid attention to during storage, transportation and use. At the same time, attention should also be paid to the proper handling of pesticide packaging.
(3) Control object, dosage and use method: The object of prevention and treatment of the drug should be marked according to the scope registered in the pesticide test of the Ministry of Agriculture, and the dosage and method of use should be specific. For example, the cotton used to control cotton bollworm on cotton can not be used to control cotton bollworm on vegetables and other crops; the method of use cannot be changed at will, and the use of pre-emergence herbicides in corn fields is often difficult due to insufficient water consumption. The film is formed on the surface to reduce the efficacy; the control of fruit trees is often caused by insufficient water consumption, which reduces the efficacy.
(4) Safety interval: the number of days from the last application to the harvest. If it is used on vegetables, it must wait until the specified number of days, and the pesticides in the product can be decomposed.
(5) The common name of pesticides: There are two methods for expressing pesticides in the market: generic names and commodity names. The name of a product is like the “milk name†of a person. It cannot be used alone. Especially if someone accidentally takes it, the doctor is not easy to treat the disease. The generic name of the pharmacy must be attached, and the common name cannot be used only in English. People can use the common name to preliminarily determine the type of the pharmacy or whether it is a mixture and whether it is a new variety.
(6) Active ingredient content: marked by percentage, the same drug name, different content, different dosage.
I believe that farmers' friends, as long as they choose, choose, and use these pesticides rationally, don't over-pursuing the quick-acting effect when choosing pesticides, there will be a good harvest!
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