The spotting of greenhouse melons is caused by various reasons. The Chinese pesticide net Xiaobian analyzes whether it is caused by spraying pesticides. A soap dispenser (in europe mostly known as soap squirter) is a device that, when manipulated or triggered appropriately, dispenses soap (usually in small) in the kitchen. Soap Dispenser,Soap Dispenser For Kitchen,Black Marble Soap Dispenser,Kitchen Liquid Soap Dispenser Kaiping Jenor Sanitary Ware Co., Ltd , https://www.sanitaryjenor.com
First, the ventilation in the greenhouse is late, which will lead to high temperature and high humidity in the shed. When the shed starts, the rising temperature will cause a layer of water on the surface of the melon, and if the melon is ventilated at high temperatures, it will be prone to green spots.
Second, the planting density is large. In order to increase the output of farmers, the planting density of melons will make the lower part of the melons close, which will greatly affect the ventilation and light transmission, resulting in the formation of green spots.
Third, the medication time is not correct. In fact, spraying pesticides at high temperatures will cause the melon to be contaminated with pesticides, resulting in the formation of green spots.
Fourth, when spraying pesticides, if the concentration is too large, green spots will appear on the melon surface.
The pesticide network Xiaobian teaches you specific preventive measures:
One must be ventilated to master the method. Master the skills when ventilating to prevent green spots on the melon. The specific procedure is: when the wind is released, it is the temperature in the shed. After the shed, you can open a small opening in the upper vent, but you can't make the temperature in the shed drop faster. After the temperature in the shed rises, slowly increase the upper vent, so that the water on the surface of the melon will not evaporate. Finally, the shed temperature is maintained at 28 ° C ~ 30 ° C. Even a cloudy day requires a short period of ventilation.
The second planting is to pay attention to the density. The planting density is too large, and it does not help the yield. The planting of each acre is generally required to be 2,500-2,800, the grafted melon can be about 2,500, and the non-grafting can be 2,800.
The third is to spray pesticides on the sunny day 9 to 10 o'clock, after 2 o'clock in the afternoon after the temperature rises, then spray pesticides. Prompt everyone, the water droplets that are meloned in front of the shed must be completely covered.
Fourth, the concentration should be appropriate when spraying pesticides . The concentration is too small to prevent disease, the concentration is too large, and there may be phytotoxicity. It is necessary to formulate the pesticide solution according to the instructions.