1, in the selection of fungicides to understand the nature of the fungicide. There are two types of fungicides, one is a protective agent, such fungicides are to prevent the incidence of plants, such as Bordeaux mixture, mancozeb, carbendazim, etc.; the other is a therapeutic agent, is applied after the onset of the plant In order to kill or inhibit the pathogens that invade the plant body, the therapeutic agent has better effect in the early stage of disease, such as anti-jumbo and Baozhida.

2. The fungicide should be sprayed before 9 o'clock in the morning or after 4 o'clock in the afternoon to avoid use under the hot sun. If spraying under the hot sun, the chemical can be easily decomposed and evaporated, which is not conducive to crop absorption.

3, fungicides can not be mixed with alkaline pesticides. Do not arbitrarily increase or decrease the use of fungicides and should be used with them.

4. Most bactericides are powders, emulsions, and suspensions that must be diluted before application. When you dilute, release the medicine first, then water, then stir with a stick. When mixing with other pesticides, dilute the fungicide and mix it with other pesticides.

5. The interval for spraying with fungicides is 7-10 days. For agents with poor adhesiveness and poor systemic absorption, they should be exposed to rain within 3 hours after spraying, and should be sprayed again after rain.

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