How to improve the bactericidal effect of fungicides

Fungicide has a pivotal position in the field of pesticides, fungicides how to improve the bactericidal effect, Chinese pesticide Xiaobian finishing the seven notes:

First, reasonable allocation

Reasonable allocation of different concentrations of fungicides has special requirements for the concentration of use. When configuring the concentration, it must be strictly in accordance with the "instructions for use", and should not be increased or reduced at will.
Second, the selection time

Selecting the time of spraying and spraying the bactericide too late or too early will affect the control effect. The drug should be administered in time according to the occurrence law and specific conditions of different diseases of crops. It is usually used before the onset (protective use) or at the onset of the disease (precaution).
Third, the number must be well grasped

Mastering the frequency of spraying The frequency of spraying of the fungicide is mainly determined according to the length of the drug's effective period and meteorological conditions. Usually spray every 10 to 15 days, a total of 2 to 3 times. In case of special circumstances, such as rain after application, it should be replenished in time.
Fourth, control the amount of medication

It is necessary to increase the quality of the drug to be used. Too much drug will increase the cost and cause phytotoxicity. However, if the drug is too small, the drug can not be used. The quality of the medication should be exquisite, and the spray should be evenly sprayed, so as to ensure that it does not leak.
5. Prevention and treatment of phytotoxicity

There are many reasons for strictly preventing the phytotoxicity caused by bactericidal fungicides. Firstly, the agents with strong water solubility are prone to phytotoxicity. Secondly, different crops have different sensitivities to the medicinal agents. For example, Bordeaux mixture generally does not cause phytotoxicity, but Copper-sensitive crops can also cause phytotoxicity. Beans, potatoes, and cotton are sensitive to stone sulphur. Furthermore, the different growth and development stages of the crops have different responses to the chemicals, and the seedlings and the flowering stages of the booting are prone to phytotoxicity. In addition, the general use of high temperature and drought, strong sunshine or fog, high humidity and other conditions can easily cause crop phytotoxicity.

Six, carefully mixed pesticides precautions <br> pharmaceutical fungicide mix alkaline lot of pesticides, it is not easy to break with the case of failure insecticide mix alkaline substances, such as Bordeaux mixture, lime sulfur and other alkaline. Some fungicides, such as carbendazim, cannot be mixed with boricides such as Bordeaux mixture, stone sulphur mixture, and thiophanate, which also cause the insecticidal (bacteria) microorganisms to lose their physiological activity and insecticidal (bacteria) ability.

Seven, the problem of drug resistance can not be ignored <br> Attention to avoid drug resistance The use of fungicides also have the problem of drug resistance of crop diseases. In order to avoid disease resistance, it is necessary to do a good job of alternating (rotary) use of different types of pesticides on the basis of scientific selection of pesticides. It is strictly forbidden to use one pesticide for a long time.
General pesticide use instructions have recommended concentrations, can be used according to the instructions, master the best spraying time of the fungicide, so that the fungicide achieves the best results.