When spraying pesticides on vegetables to prevent and treat various pests and diseases, they should be flexibly controlled according to different seasons, types of diseases, and pharmaceutical properties in order to achieve better control effects.
First, different seasons, suitable for spraying time is different
In general, the winter illumination time is short, the temperature is low, the dryness is slow after spraying, and the probability of occurrence of phytotoxicity is small. In winter, as long as the dew on the vegetables in the morning has dried, it can be done before closing the vents in the afternoon. In summer, the temperature is high, especially around noon. The liquid medicine dries quickly and has strong activity. It is more prone to phytotoxicity under high-temperature and strong light conditions. Therefore, it is best to choose to spray in the evening in the evening.
Second, different types of pests and diseases, suitable for different spraying time
Different kinds of diseases and insect pests, the time of onset of infection is not the same, there are differences in the spraying time. Especially in pest control, it is necessary to make flexible adjustments based on pest activity. Such as ground tigers, hummer and other pests used to feed at night, the best choice for farmers when spraying the evening, the efficacy is more guaranteed; whiteflies, locusts mainly in the morning to take the food to spray the morning as well.
The high humidity and dew in the greenhouse during the night is the main period for disease infestation. Especially when it is cloudy, it is necessary to pay attention to the prevention of disease, and it should not be sprayed on cloudy days. On cloudy days, as long as adequate ventilation can be ensured, it is appropriate to spray and prevent disease. If outside air temperature is low and ventilation is not possible, vegetable growers are worried about increasing the humidity in the shed and increasing the risk of disease. They can also choose products such as smoke, dust or air disinfection tablets, which can achieve the effect of sterilizing and disinfestation without increasing the shed. Internal humidity.
Third, different agents, suitable for spraying different time
There are many types of agents, and the characteristics of different agents vary greatly. For example, avermectin is sensitive to light and can easily decompose and fail under strong light. It is better to avoid using it in strong light in the morning and at noon, and use it from weak light in the afternoon to the evening. Bacillus subtilis, Harziac trichoderma, Bacillus thuringiensis, and other microbial pesticides are mostly sensitive to ultraviolet rays in the light, and should not be used when the light is strong. In addition, microbial reproduction requires high humidity, especially for Bacillus thuringiensis, Beauveria bassiana, and other insecticides, which require faster and better results when the humidity is high.
Oxygen Cylinder Filling System
ETR Oxygen Cylinder Filling System
By PSA principles, ETR PSA oxygen generators generate 93%±2% purity oxygen gas directly from compressed air. ETR oxygen cylinder filling plant is consisted of Atlas Copco air compressor, Parker dryer and filters, air buffer tank, ETR PSA Oxygen Generator, oxygen buffer tank, oxygen receiver tank, diaphragm oxygen booster, filling station and control cabinet.
Compressed air is purified through the air dryer and filters to a certain level for main generator to work with. Air buffer is incorporated for smooth supply of compressed air thus to reduce fluctuation of compressed air source. The generator produces oxygen with PSA (pressure swing adsorption) technology, which is a time proven oxygen generation method. Oxygen of desired purity at 93%±2% is delivered to oxygen buffer tank for smooth supply of product gas. Oxygen in buffer tank is maintained at 4bar pressure, then reach to 150bar to filling cylinders with an oxygen booster.
Oxygen Cylinder Filling System,Homefill Oxygen System,Oxygen Refilling Plant,Oxygen Refilling Station
Hunan Eter Medical Co., Ltd. , https://www.eter-tech.com