Control method of rotten amaranth
Sweep
When it comes to the rotten amaranth in the vegetable field, it is very bad. The first thing is to clean the vegetable garden, clean all the residual branches or fallen leaves, and finally bury it deeply and burn it, which can reduce certain contagiousness.
temperature control
Temperature control is very important, it will have a great impact on rotten amaranth. First of all, remember that the growth temperature of the head leeks should not exceed 23 degrees, the night temperature should not be lower than 10-12 degrees, and each time later will be higher than the first time. The temperature can be 2-3 degrees, in short, can not exceed 30 degrees, but also pay attention to the temperature difference between day and night.
Smoke control
Many diseases can be controlled by smoking. The method of smoking leeks is: 3% thiabendazole smoker 250g, or 10% chlorpyrifos 250-300g. Ignite the points, close the greenhouse, smoke for one night, you can effectively prevent rotten leeks.
Chemical control
Any disease can be citing the drug for prevention and treatment, mainly to get the right medicine. Spray with 20% powder rusting wettable powder 500 times, and prevent it once every 7 to 10 days. If it has already occurred, it can be sprayed with 40% dimethylpyramine suspension 1200 times solution.
During the production of highway painting, put glass bead into paint based on the ratio of 18-25% (weight percentage), so that the highway paint can still keep reflectivity during wear and friction. The ratio is refer to the specification of Communication Industry Standard of the People`s Republic of China No. JT/T280-2004, the standards which is different in different countries and areas.
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The appearance of glass bead should be colorless, loosen and spherical particle, should be clean without impurity, and without agglomeration |
According to the specification of Communication Industry Standard of the People`s Republic of China No.GB/T24722-2009, the granulometry is shown in the table below:
The glass bead can be produced based on the standard of countries or areas, such as EN1423/1424, AASHTO M247, BS6088, JIS R3301 and KS L2521 etc.
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