How to correctly use various types of fungicides
The use of fungicides requires more technology than pesticides, so it is more difficult to master. Therefore, when using fungicides, we must master the following principles to receive good results. 1. Know what major diseases crops can cause. In order to achieve the right remedy. Due to different types of fungicides have different properties, characteristics and modes of action, there is no "panacea". 2. To know the role of fungicides. According to the role of pesticides in the prevention and control of disease, it can be divided into three categories: Protective fungicides: These fungicides can protect the pesticide application site that is not infected by the bacteria, free from infection by pathogens, and need to be free from disease in crops. Before the occurrence of the disease, spraying can receive effects such as copper preparations (Bordeaux liquid), sulfur preparations (lithium sulfur), mancozeb manganese, and zesin zinc. Eradication fungicides: These agents can directly kill the pre-invasive germs and treat the infected part of the application. They are often sterilized and are rarely used directly on crops. If formalin is used to sterilize the seeds of the carrier, triadimefon can effectively eradicate wheat stripe rust and powdery mildew. Therapeutic bactericides, also known as systemic bactericides, prevent the development of germs in various parts of the plant after they have been absorbed and transferred by plants. Such as carbendazim, thiophanate, and kasugamycin. 3. Different types of pesticides are also used in different ways. 1 seedling stage system protection: including liquid soaking, stuffy liquid, seed dressing (dried mix, wet mix), seed coating agent, liquid dip seedlings and so on. The commonly used drugs are seed dressing double, Fu Mei pairs. Seedlings include seeds, tubers, tubers, bulbs, cuttings, seedlings, seedlings, and other organs for reproduction. 2 Chemical treatment of soil. Is an overall or partial protection, such as directly in the seedbed soil species are chloronitrobenzene, chloropicrin and so on. The following methods can be used to treat the soil: watering (water-soluble liquids, watered at a rate of about 5 kg per square meter); plowing the furrow or furrows; blending (spraying the chemicals on the surface of the soil and then plowing the soil , so that the agent is turned into the soil surface); injection method (with a soil syringe, according to a certain dose and hole distance applied to the soil) and so on. 3 leaf spray; leaf sprayed with a variety of formulations, such as powder, micronized powder, wettable powder, EC, suspension, water, aerosol and so on.