Protective agent
The protective agent treats the plant or the surrounding environment with the agent before the pathogenic microorganisms are in contact with the plant or is not immersed in the plant body, and the pathogen spores which inhibit the germination of the pathogenic spores or kill the germination are protected to protect the plants from the damage. This effect is called protection. effect. The agent having such an effect is a protective agent. Such as Bordeaux liquid, Daisen zinc, copper sulfate, green milk copper, mancozeb, chlorothalonil and so on.
Treatment agent
The therapeutic agent pathogenic microorganisms have been immersed in the plant, but the plant exhibits a condition in which the condition is in an incubation period. The drug infiltrates into the plant tissue from the plant epidermis, and then transports, spreads, or produces metabolites to kill or inhibit the pathogen, so that the diseased plant is no longer affected and restored to health. An agent having such a therapeutic effect is called a therapeutic agent or a chemotherapeutic agent. Such as methyl thiophanate, carbendazim, chunleimycin and so on.
Eradication agent refers to the plant after the disease can be applied directly to kill the pathogens of invaded plants. The agent having such a scooping action is a scavenger. Such as Fumei arsenic, sodium pentachlorophenol, stone sulfur mixture and so on.