Garden vegetables are prone to diseases and pests due to high temperature and humidity, especially gray mold, which has become more and more serious year by year and has become one of the most difficult diseases to eradicate in greenhouse vegetable cultivation.
Today, I would like to recommend an excellent agent for the prevention and treatment of gray mold - Boscalid. It has preventive, therapeutic and eradication effects on gray mold.
1. What are the fungicidal characteristics of the "noble" fungicide boscalid?
In the current mainstream fungicide market, boscalid belongs to the new generation of fungicides.
As a new generation of fungicides, compared with traditional fungicides, boscalid has more prominent fungicidal characteristics, which are mainly manifested in three aspects:
① Strong targeting
Different from broad-spectrum fungicides such as triazoles and methoxyacrylates, although boscalid also has a broad spectrum of fungicides, it is only effective for diseases with mildew or rot symptoms, such as gray mold, powdery mildew, sclerotinia, root rot or other rot diseases.
Especially for gray mold of crops, after mixing with fludioxonil, it can kill gray mold fungi within a few hours.
②It has upward conductivity, which is not only suitable for leaf spraying, but also for root irrigation or seed dressing
Boscalid does not have systemic conduction. When the liquid medicine contacts the leaf surface, it can be conducted inside the leaf through the penetration function, and this penetration is rapid. If it rains within one hour after application, it does not need to be re-sprayed.
Although boscalid does not have systemic conduction function, it has the ability to transfer to the top of the plant through the root system. Therefore, it can be used for root irrigation and seed dressing of crops, which can not only prevent and control root diseases, but also effectively prevent the occurrence of plant diseases (gray mold, powdery mildew and early blight).
③ Prevention + treatment, protect crops from long-term infection by pathogens
Take gray mold as an example. Boscalid has a strong inhibitory effect on the germination of pathogen spores, which can effectively prevent the elongation of germ tubes and the formation of appressorium, thus showing a good preventive effect. It can also inhibit the elongation of hyphae and spore formation of gray mold fungi, so it can prevent the chance of secondary infection, thus achieving the purpose of long-term protection with one application of pesticides.
According to the data obtained by the research department through experiments, after spraying boscalid on strawberries, the drug effect can last up to about 15 days, which is difficult to be reflected in other similar fungicides.
Because farmers have not thoroughly understood the performance of boscalid, they believe that high-priced fungicides can achieve the maximum bactericidal effect with the smallest dose. Therefore, when preventing and controlling diseases, they often use low doses of pesticides, which creates the illusion that many farmers think that boscalid has poor effects.
With the emergence of resistance to boscalid, in practical applications, it is often necessary to mix other fungicides to improve the control effect, which increases the cost of drug use for crop cultivation.
Main features
(1) Broad fungicide spectrum: Boscalid is a broad-spectrum fungicide that can effectively control more than 10 diseases such as gray mold, sclerotinia, powdery mildew, root rot, early blight, etc. It has good protection and treatment effects, especially for gray mold.
(2) No cross-resistance: Boscalid is the latest generation of amide fungicides. It has no cross-resistance with traditional fungicides such as fenpropimorph, procymidone, and pyrimethanil. It is the first choice for the control of resistant gray mold.
(3) Strong permeability: Boscalid has good permeability and vertical permeability. It can penetrate through the leaf tissue to the back of the leaf, achieving the effect of treating the disease in separate leaves.
(4) More thorough treatment: Boscalid kills pathogens mainly by inhibiting the synthesis of the ability substances in the mitochondria of pathogens. It has a good killing effect on all stages of pathogens. More thorough treatment.
(5) Good systemic conductivity: Boscalid can be transmitted to the leaf tips and leaf edges of the plant through the xylem, which can effectively prevent and control diseases occurring in various parts.
(6) Good compatibility: Boscalid can be mixed with a variety of fungicides such as azoxystrobin, pyraclostrobin, procymidone, and fludioxonil, which not only expands the fungicide spectrum, but also reduces the drug resistance of pathogens.
