Safely apply vegetables

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Vegetables are directly supplied to people. The use of pesticides in vegetables is directly related to the health and safety of people. It also relates to selling a good price. Therefore, special attention should be paid to the following issues when using them: The use of highly toxic substances is strictly forbidden. And high residual pesticides such as 1605, 1059, methamidophos, organic amalgam, arsenic, chlordane, cyanide, dibromochloropropane, fluoroacetamide. At the same time, we must strictly implement the “safety interval” system for pesticides, and do not spray pesticides 10-15 days before harvesting vegetables to ensure that vegetables meet pollution-free standards. The right medicine and timely medication: There are many pests and diseases of vegetables, and sometimes several pests and diseases occur at the same time. It is necessary to adopt pesticides and methods of application. For example, foraging pests (Hamiopsis platyphylla, Pallidopsis mellifera) should use stomach poisons (such as kung fu and fast-killing enemies) and be sprayed at the time of their first and second instar larvae. The third-instar larvae are more resistant to insects; Insects such as red spiders should be controlled by systemic inhalers (such as scorpion net and confodol). Correctly grasp the use concentration of various types of pesticides: At present, there are many kinds of pesticides and dosage forms. For pesticides with the same name and different dosage forms, the concentration, application method, and time are often different, so it is necessary to strictly follow the types of pesticides. Recommended dose to use. Carry out alternate alternations and mixed use of drugs: If a certain pesticide is used continuously for a long time in an area, it is very easy for the pests to produce drug resistance, resulting in a significant reduction in control effect, and even increasing the concentration will not help. Therefore, in the production practice, it is effective to adopt pesticides of different types (such as different types of pesticides that have stomach poisoning, contact killing, and internal absorption in insecticides) to control pests. Achieve the effect of overcoming resistance, killing quickly, and reducing costs. In the same way, adopting scientific and rational compounding of mixed pesticides can be used to expand prevention and control targets and improve control effectiveness. It can also give full play to their respective advantages to delay pest resistance and reduce control costs. If 75% of chlorothalonil is mixed with more than 44% of Insect Clear 1000 times spray, it can prevent and control most of the pests and diseases on vegetables. However, it must not be blindly and arbitrarily mixed, should choose the same nature (if both acidic or alkaline) of the two or three pesticides mixed, so that according to their respective concentration requirements for blending, with the mix with the spray. (Shi Guoji, Associate Professor, Hubei Agricultural College)

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