Ozone is a colorless gas with a slight odor. When dissolved in water, it becomes a strong oxidant and has a strong killing effect on living cells. The ozone generator can convert oxygen in the air into ozone under the ionization effect of high pressure and high frequency electricity, and then apply it in consumption. Its power is usually below 200 watts.
Ozone is widely used in pharmaceutical factories for environmental disinfection, which is a well-known function. However, many people are unaware that ozone can also prevent insect infestations. In recent years, experimental demonstrations of using ozone generators to control vegetable pests and diseases in greenhouses around Xi'an have been carried out, achieving good results.
Of course, it can be extended for the cultivation of traditional Chinese medicine to avoid pests and diseases.
The advantages of ozone for pest control:
Safe, efficient, and cost-effective. Ozone can be used for multiple purposes, while also preventing and controlling various pests and diseases, and the cost of prevention and control is low. Compared with spraying pesticides, releasing ozone is more convenient, efficient, and safe, which can greatly reduce the amount of pesticide used and prevent vegetable farmers from using highly toxic and residual pesticides, thereby reducing the cost of medication.
No pollution. Ozone is unstable in dry air and can be quickly synthesized and restored to oxygen, making it pollution-free and residue free in plants and fruits. It is an important way to achieve pollution-free vegetable consumption.
Improve quality and increase production. Through experiments, it was found that the use of ozone in greenhouse tomatoes significantly reduced abnormal fruit, increased yield by about 20%, and resulted in larger fruit size, better coloring, and better taste.
Application method:
Seed disposal. Introduce ozone gas into clean water and stir periodically. After 10 minutes, an ozone solution is prepared. Soaking the seeds in it for 15-20 minutes can kill viruses, bacteria, and insect eggs on the surface of the seeds.
Greenhouse pest control:
Disinfect the smoking shed. Ten days before planting, the high-temperature greenhouse can be separated and concentrated with an ozone generator to release ozone into the greenhouse for at least 2 hours Prevent and control diseases and pests in seedbeds. First, seal the seedbed tightly, apply for 1 minute every 10 square meters, and fumigate it tightly for 10 minutes, then ventilate for 30 minutes Prevention and control of pests and diseases after planting vegetables with equipment. After planting and delaying seedlings, ozone should be continuously applied to each acre of greenhouse for 7-10 minutes, followed by sealed fumigation for 15-20 minutes, and then ventilated for 30 minutes. The pest free greenhouse should be applied once every 5-7 days, continuously for 5 times. After 2-3 applications, the application time should be increased by 5 minutes until it reaches 25 minutes per acre. The fumigation time is also increased by 5-10 minutes every 2-3 times. Experimental results have shown that ozone has a good control effect on tomato gray mold, leaf mold, early blight, late blight, cucumber downy mildew, blight, as well as greenhouse percentage lice, leaf miner flies, aphids and other pests and diseases. But for pests and diseases in the greenhouse soil, due to the small amount and low concentration of ozone gas infiltrating into the soil, it has no effect.
Attention:
Reasonably determine the amount of application and fumigation time. The amount of ozone released and the duration of closed greenhouse fumigation should be adjusted appropriately according to different crops and their growth stages. Compared to crops in the seedling stage, crops in the adult stage are more adaptable to ozone. If the amount of ozone emitted during consumption is too large or the greenhouse fumigation time is too long, it may cause poisoning and withering of greenhouse vegetable leaves and flowers, and in severe cases, it may lead to plant death.
As the plant grows, the application amount and fumigation time can be gradually increased to achieve the goal of preventing and controlling pests and diseases without harming vegetable crops. When releasing, it should be as evenly distributed as possible, and the nozzle should not be directly facing the vegetables, but should be at least 0.8-1 meters away from the vegetable plants. After the fumigation time, ventilation should be carried out promptly, and the normal ventilation time should not be less than 30 minutes. Strictly prevent people and animals from entering the greenhouse during fumigation to avoid poisoning or other adverse reactions.
Temperature and humidity regulation. When ozone is released, the indoor temperature of the greenhouse should be maintained within the range of 10-30 ℃, and the prevention and control effect will be better under conditions of high air humidity.

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