Due to the rapid development of systemic fungicides , the prevention and control effects have been declining. The problems of increasing the dosage and even the failure of pharmaceuticals have come one after another. It has been confirmed by research that various germs are resistant to certain fungicides. Irrational use of drugs can lead to resistance.
Pathogens are lower organisms, they are highly adaptable, and they are prone to genetic mutations to facilitate their own survival and reproduction. It has been confirmed that the pathogenic bacteria are likely to be highly resistant to the systemic bactericide, and if a certain systemic bactericide is used continuously, for a long period of time, a drug-resistant phenomenon occurs, and the drug dosage does not take effect. The gray mold in China has developed resistance to carbendazim, and the rice blast fungus is resistant to different rice sputum and other drugs. The cucumber downy mildew in the greenhouse is resistant to metalaxyl. The problem of resistance has now been solved by replacing the use of fungicides with different mechanisms of action. A systemic bactericide is used only once or twice in a growth cycle, preferably in rotation with a protective agent, which inhibits the emergence and development of strain resistance. The same kind of pesticides, such as metalaxyl and acetonin, have positive interactions with the bacteria, so they cannot be rotated by the same kind of drugs.
Some of the pathogens are susceptible to mutations, such as gray mold, downy mildew, Phytophthora, penicillium, green mold, powdery mildew, rust, rice blast, black bacillus, etc., caused by damage to these bacteria When disease prevention and control is carried out, attention should be paid to the selection of pharmaceutical agents and rational use.
The phytotoxicity is the damage caused by chemical pesticides to the crops. It is usually excessive or due to the use of different pesticides. Some crop varieties are sensitive to drugs, and some are high in humidity. Cold and fogging may also cause some drugs to be produced. Crop damage. For crops that are susceptible to phytotoxicity, medication should be used with great care.
Prevent poisoning accidents.
Most of the fungicides are low-toxic drugs. Low toxicity does not mean non-toxic. Many drugs have stimulating effects on human skin or mucous membranes. In the application process, they must do their own protection. Some products are highly toxic, such as Kebai. Wei, aldicarb, etc., although it has been made into granules with low active ingredients, the toxicity is still high, and it should be handled according to the regulations. The China Pesticide Network reminds everyone that seeds are treated (including seed coating), remember not to eat, and can not be used as feed, should be properly kept to prevent accidental eating.
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EN13561-2015 certification:
Resistance to wind load: Class 1
Operating effort: Class 2
Mechanical Endurance: Class 2
Resistance to corrosion: Class 2
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