Radish cultivation is available in all areas of China, but recently farmers have reacted and planted for several years. Almost every year, they encounter black radish. Some radishes are dark in the ground, and rot is dead. Then you Do you know what is going on? How to prevent it? Let's take a look at it.
Radish black rot symptoms
At the time of onset, the radish leaf edge will have an irregular V-shape, or a round yellowish spot, and then the radish veins will turn black, the mesh will become bitter, and then the leaves will fall off. If the radish rhizome is involved, the pathogen will reach the heart of the radish from the petiole, which will cause the internal rot of the radish to soften and then die. If the radish with a lighter onset begins to turn black, it will not rot, and it will gradually become bitter.
Radish black rot prevention and treatment method
1. Before planting radish, growers should choose resistant varieties and then disinfect the seeds.
2, it is best to plant in the soil with fertile soil and good drainage performance, and it can also be rotated with non-Cross-Vaice vegetables.
3. Treat the soil before planting. 65% mancozeb 0.5 kg, or 50% Familia double 1 kg, and 10 kg of fine soil mix well, the hole application or ditch applied to the seeding line, this will kill the bacteria in the soil.
4. In the process of planting radish, we must grasp the planting time and apply enough farmyard manure. During the planting process, we can broadcast high ridges and carry out reasonable seedlings. Once we see the radish, we need to remove it in time. At the beginning of the disease, vegetable farmers need to spray pesticides in a timely manner. Generally, they are sprayed once every 1 week or so for 2 times.
5, the general choice of pesticides for growers is 50% Fumex 500 times solution, or 65% mancozeb 500 times solution, or 200 mg / kg neomycin, and 200 mg / kg agricultural streptomycin, etc. But be sure to pay attention to alternating application.
The above is about the symptoms and prevention methods of radish black rot. When you plant, you can follow the introduction of the small series. I hope that the method introduced by Xiaobian can help the majority of growers.
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The main differences between powder,premixed agent, granule are as follows:
Veterinary Soluble Powder: means a dry powder preparation made of one or more drugs by grinding and evenly mixing, with or without dressing.
Premix: refers to one or more drugs, and a suitable substrate evenly mixed to make a powder or granular preparation.
As a dosage form of feed drug additive, it is specially used for mixed feeding.
Powder powder, that is, powder, and premixed agent, the main differences of granules are as follows:
1.the production method is different
1.powder: medicine or with appropriate auxiliary materials by grinding, evenly mixed dry powder preparation.
2.Veterianary premix: powder or granular preparation made by evenly mixing the drug with an appropriate substrate.
3.granules: raw materials and appropriate excipients mixed into a certain particle size of dry granular preparation.
2.different characteristics
1. Dispersing agent: compared with other solid dosage forms, dispersing agent is easy to disperse, dissolves quickly, absorbs quickly and takes effect quickly; The preparation process is simple, the dosage is easy to control, and it is easy for infants to take.
2.Premix for animal: Premix used in the matrix including carrier, diluent, etc. The substrate should be stable, with good fluidity, and easy to mix with drugs and feed.
3. Granule: the dispersion, adhesion, agglomeration and hygroscopicity of granule are lower than that of granule; The separation of various components in granule is avoided because of the adhesive used to make granule after mixing. Convenient storage and transportation; Particles can change their function by coating.
Veterinary drug premix,Premix for animal,Veterinary premix,Poultry premix feed
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