1. When using a liquid spray, it is often necessary to formulate or dilute the drug into an appropriate concentration with water. If the concentration is too high, it will cause phytotoxicity and waste. If the concentration is too low, it will be ineffective.
2. Spraying time too early will cause waste or reduce control effect. When too late, a large number of pathogens have invaded the host. Even if the therapeutic agent is sprayed, it will not gain much. It should be based on the law of the disease and the current situation or according to the situation. Short-term forecast, timely grasp the spray protection in the absence of onset or just onset.
3, spraying times The number of spraying is mainly determined according to the length of the residual period of the drug and meteorological conditions, usually sprayed once every 10 to 15 days, a total of 2 to 3 times, after the rain to make up the spray, should consider the cost, save medication.
4, the amount of spray should be appropriate, too little effect is not good, too much waste or even cause phytotoxicity, spraying requires a fine fog, even spray, all parts of the plant should be protected including the front and back of the blade To spray.
5, to prevent phytotoxicity spray on the plant caused by a variety of reasons, the water-soluble agents are prone to phytotoxicity, different crops have different sensitivities to the pharmacy, such as Bordeaux liquid generally does not cause phytotoxicity, but Copper-sensitive crops can cause phytotoxicity. Beans, potatoes, and cotton are sensitive to stone sulphur. The different developmental stages of the crop react differently to the agent, and the seedlings and the flowering stage of the boot are prone to phytotoxicity.
6. Reasonable mixing of pesticides that are generally prone to decomposition and failure of alkaline substances cannot be mixed with alkaline substances.
7. Avoiding drug resistance Long-term use of a single agent can lead to drug resistance and invalidation of the agent used. To avoid this problem, different types of agents can be used alternately, or a combination of a systemic fungicide and a conventional fungicide.
2. Spraying time too early will cause waste or reduce control effect. When too late, a large number of pathogens have invaded the host. Even if the therapeutic agent is sprayed, it will not gain much. It should be based on the law of the disease and the current situation or according to the situation. Short-term forecast, timely grasp the spray protection in the absence of onset or just onset.
3, spraying times The number of spraying is mainly determined according to the length of the residual period of the drug and meteorological conditions, usually sprayed once every 10 to 15 days, a total of 2 to 3 times, after the rain to make up the spray, should consider the cost, save medication.
4, the amount of spray should be appropriate, too little effect is not good, too much waste or even cause phytotoxicity, spraying requires a fine fog, even spray, all parts of the plant should be protected including the front and back of the blade To spray.
5, to prevent phytotoxicity spray on the plant caused by a variety of reasons, the water-soluble agents are prone to phytotoxicity, different crops have different sensitivities to the pharmacy, such as Bordeaux liquid generally does not cause phytotoxicity, but Copper-sensitive crops can cause phytotoxicity. Beans, potatoes, and cotton are sensitive to stone sulphur. The different developmental stages of the crop react differently to the agent, and the seedlings and the flowering stage of the boot are prone to phytotoxicity.
6. Reasonable mixing of pesticides that are generally prone to decomposition and failure of alkaline substances cannot be mixed with alkaline substances.
7. Avoiding drug resistance Long-term use of a single agent can lead to drug resistance and invalidation of the agent used. To avoid this problem, different types of agents can be used alternately, or a combination of a systemic fungicide and a conventional fungicide.
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