Vegetables are the main crop in our country. The biggest problem in vegetable production is the control of pests and diseases, especially the prevention and control of diseases, which is a problem in vegetable production.
In the prevention and control of vegetable diseases, in addition to agricultural, physical and ecological control measures, chemical control is the most used measure. In chemical control, fungicides are used most widely and frequently.
In the various diseases of vegetables, downy mildew and epidemic diseases occur most commonly, whether it is seedling disease or other diseases. In order to prevent and control these two diseases, in the late 1980s and early 1990s, China introduced the first benzoic acid metalaxyl, Rademere, and introduced anti-mite and other amide fungicides. Due to its remarkable protection and therapeutic effects, this class of drugs has been widely used for the control of downy mildew and disease, and has played an important role in production.
However, it should be pointed out that this type of fungicide has a single site of action, and once the site of action changes, it will inevitably lead to resistance of the bacteria. For a long time, there have been many instances where drug resistance has been reduced due to drug resistance. Production practice shows that in some traditional vegetable production areas, the resistance of pathogenic bacteria is strong, and the use of fungicides has been decreasing (currently down to 200-300 times), not only the prevention and control costs are greatly increased, but also the prevention and control effect from the initial stage. 70%-80% dropped to the current 30%-40%. Therefore, many experts suggest that in order to do a comprehensive job of comprehensive prevention and control, we must scientifically select new types of pesticides, and alternately use drugs during prevention and control. In view of the above situation, here are two environmental friendliness fungicides for the prevention and treatment of downy mildew and epidemics.
Ank. Anke is produced by BASF, Germany, and its dosage form is 20% dry suspension. In 2000, it was recommended by the Ministry of Agriculture as the first choice for the treatment of downy mildew and epidemic diseases. The drug has three prevention and control functions: First, the prevention function, to prevent the invasion of bacteria; Second, the treatment function, can penetrate into the plant tissue to kill bacteria; Third, the anti-spore production function, to prevent the formation of pathogenic spores, to avoid re-infection of the plant. Anke dispersion is good, strong infiltration, strong system, resistance to rain erosion, one hour after application of pesticide efficacy is not affected, the effective period of 7-10 days, can quickly kill bacteria that are resistant to other fungicides, Use multiples of 2500-3000, can be widely used in melons, tomatoes, tobacco, potatoes, leafy vegetables, beans and other crops.
Second, Kejia. Kejia is a pesticide manufactured by Ishihara Sangyo Co., Ltd., and the dosage form is 10% rubber suspension agent, which has a good control effect on downy mildew and epidemic diseases. The biological activity of the drug is high, and the use multiple is 2500-3000, which can hinder the development of pathogenic bacteria at various stages of growth, and is a super-protective fungicide. Its chemical structure is unique (cyanoimidazoles), the action site is different from other fungicides, and it can effectively prevent and cure pathogens that have been used for common bactericides such as Kelu, Antivirus, and Metalaxyl. Its effective period can be as long as 10 to 14 days. It is safe for crops. It can be used with a variety of pesticides and is not afraid of rain after application. It is commendable that the product is micro-toxic, does not harm bees, grasshoppers and other beneficial organisms, and is ecologically safe. It is an environmentally friendly green pesticide.
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