What are the ways to improve the efficacy of fungicides?

What are the ways to improve the efficacy of fungicides? Please give guidance to improve the efficacy of fungicides can refer to the following methods: first, pay attention to the use of concentration pesticide fungicide liquid spray, often need to use water to mix or dilute to the appropriate concentration. Too high concentration will cause drug damage and waste, and if the concentration is too low, there will be no effect. For some non-wettable or difficult to wetting powder, you should first add a little water, adjust the liquid into a paste, and then add water to configure the use. Second, pay attention to the application time too early will cause waste or reduce efficacy; too late will cause a large number of pathogens to invade the host, even if sprayed for treatment, there is little effect. Third, pay attention to the number of times fungicides are generally sprayed every 10-15 days, a total of 2-3 times, after spraying in case of rain, should be supplementary spraying. When using fungicides, we should pay attention to consider the cost and save the use of drugs. Fourth, pay attention to the long-term single use of drug resistance (mainly internal inhalation fungicides, such as carbendazim), which will cause drug resistance of pathogenic bacteria, invalidate the conventional dosage of drugs, and increase the difficulty of prevention and control. In order to avoid the emergence of drug resistance, different types of agents should be used alternately, such as the mixed use of internal absorption agents and traditional fungicides. Fifth, pay attention to the reasonable mixing of pesticides that are easy to decompose and fail in the event of alkaline substances, and should not be mixed with alkaline pesticides. For example, alkaline fungicides Bordeaux solution, stone sulfur mixture, etc., should not be mixed with 1605, dimethoate, dichlorvos, etc., otherwise chemical reactions will occur. Drugs that can cause drug damage can not be mixed. A small number of pesticides can play a synergistic effect after mixing. For example, when dimethoate (neutral) is mixed with alkaline fungicides (such as Dysen zinc, available sulfur, colloidal thinning, etc.), the efficacy will not be affected, but will be slightly improved. Sixth, pay attention to the quality of spraying should be appropriate, the amount of spraying is too small, can not carefully protect all parts of the plant; too much is easy, causing drug damage and waste. Spraying should be fine and evenly sprayed, and should be sprayed to both the front and back of the plant. Pay attention to the problem of drug damage there are many reasons for drug damage to plants, and the agents with strong water solubility are easy to cause drug damage. The sensitivity of different crops to chemicals is also different. For example, Bordeaux liquid generally does not cause drug damage, while beans, potatoes and cotton are sensitive to stone-sulfur mixture and are easy to cause drug damage. The response of crops to pesticides is also different in different development stages. Generally, drug damage is easy to occur in seedling stage and booting and flowering stage, so it should be used with caution. In addition, drug damage is also related to weather and meteorological conditions. Pay attention to the use of the above seven fungicides, and be careful that many fungicides are alkaline pesticides, so they can not be mixed with pesticides that are prone to decomposition and failure of alkaline substances, such as Bordeaux solution, stone-sulfur mixture and so on. Click to get more fungicide use technology click to get more pesticide use technology