Greenhouse Downy Mildew Prevention and Control Techniques
Winter vegetable production has become one of the most important ways for farmers to increase their income. The cultivation of greenhouses has increased the yield and quality of vegetables. Cucumber is a major greenhouse vegetable variety. Due to the application of greenhouses, it has changed the microclimate and ecological environment in the field. High temperature and high humidity are favorable to the downy mildew. Disease occurs. Therefore, prevention and control of downy mildew is an indispensable task for cucumber production and management.
The prevention and control technology of cucumber downy mildew should be combined with chemical control and agricultural control. First of all, according to the climatic conditions, do a good job ventilation and ventilation work in greenhouses, reduce the humidity in the field; timely removal of the old cucumber leaves, to reduce the re-infection. Second, choose a good type of agent, the right medicine. At present, commonly used pharmaceutical agents can be used: Propocarb, nitrilazole, Ami colorful, etc. Note that the use of drugs should be used alternately to improve the control effect.
The P10 two-color display module all uses the JX5020 driver chip from Taiwan Macroaccumulation. The LEDs of each branch are correspondingly driven by an IC pin. One IC pin drives one LED. We use static cross-current The driving method ensures that the current of each IC can be guaranteed, and the normal guarantee will not cause the entire module to heat up due to the different scanning methods, which will cause damage to the IC, and the brightness of the LED will also be similar to the static cross current. The static cross-current drive ensures the stability of the entire screen.
When all the LED display modules are tested, paste QC, pass, and then perform the first semi-finished product test aging. The longer the aging time, the better, let him exceed 24 hours as much as possible, and then we will display the display module Put on the bottom shell, ready to start pouring.
The glue is filled with a fully automatic glue filling machine. After the ab component glue is combined, the filling is carried out according to the ratio of 10:1. It is better not to lower or increase the ratio. The ratio of 10:1 is just right. , It can be surface-dried in about two hours, and it will dry out in about 4-6 hours. Such glue will have a good guarantee for long-term use.
After the module is filled with glue, place the module on a horizontal plane, and test with a level meter, and then try to make each module as flat as possible, complete the 4 corners of the horizontal position on the same level, the choice of AB glue It is also very important. The AB glue choice must use more than 40 yuan per kilogram of glue. Its adhesion and durability will be very good. It cannot be filled with shoddy glue. It will crack after a long time. The screen will leak. Then put all the display modules in their masks and arrange them to start packaging.
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