1. Cross-use between biological source pesticides, mineral source pesticides and organic synthetic pesticides. For example, in the production of cabbage, the Bt emulsion, the fish vine essence, the chlorpyrifos, the cypermethrin, and the trichlorfon can be used interchangeably.
2. Cross-use of protective agents and systemic agents. For example, downy mildew of vegetables, the pesticides to be used before and after the onset of the disease are different and need to be used crosswise.
3. Cross-use of spray and fumigation agent. In ensuring the normal production of vegetables, it is necessary to be good at utilizing the characteristics of good sealing of greenhouses and plastic sheds. In addition to the usual spray methods of medicines, the application method of fumigants can be used crosswise.
4. Other methods of cross-use of drugs. When pesticides are used, the stem and leaf treatment of the medicament is used in cross-over with soil treatment; the insecticide having no ovicidal activity is used in combination with the ovicide.
Reasonable mixing of pesticides can save manpower and time, and can also achieve the goal of concurrent treatment, synergy and delay of drug resistance.
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