The role of ozone generators to release pests

Ozone is a colorless and slightly smelly gas When dissolved in water, it will become a strong oxidant and have a strong killing effect on living cells Oxygen in the air can be converted into ozone by ozone generator under the ionization action of high voltage and high frequency electricity, and then it can be reused in production Its power is generally below 200W In recent years, the author has carried out the experiment demonstration of using ozone generator to control vegetable diseases and insect pests in the greenhouse around Xi'an 1、 The advantages of ozone pest control 1 Low safety cost Ozone can be used for many purposes, at the same time, it can control many kinds of diseases and insect pests, and the cost of control is low Compared with spraying pesticide, ozone is more convenient, safe, can greatly reduce the use of agricultural products, avoid the application of high toxicity, high residual pesticide, and reduce the cost of medicine 2 No pollution Ozone is unstable in the dry air and can be quickly decomposed to oxygen Therefore, it is an important way to realize the production of pollution-free vegetables without pollution and residue in plants and fruits 3 Improve quality and increase production The results showed that the abnormal fruit of greenhouse tomato decreased obviously after using ozone, the yield increased about 20%, and the fruit was big, colored and tasted well 2、 Use method 1, seed treatment The ozone gas is introduced into clean water and stirred continuously, and the ozone solution is prepared 10 minutes later Soak the seeds in it for 15-20 minutes to kill the virus, bacteria and eggs on the surface of the seeds 2 Pest control in greenhouse ⑴ fumigation 10 days before planting, ozone can be intensively released into the shed by using ozone generator in combination with high temperature closed shed, and the best time is no less than 2 hours (2) prevention and control of diseases and pests in seedbed First, the seedbed shall be sealed tightly, and the seedbed shall be put for 1 minute every 10 square meters, and the seedbed shall be sealed and fumigated for 10 minutes, and then the seedbed shall be ventilated for 30 minutes (3) prevention and control of plant diseases and insect pests after the establishment of vegetables After planting slow seedlings, ozone was continuously applied for 7-10 minutes in each mu of greenhouse, then closed fumigation for 15-20 minutes, and then ventilation for 30 minutes Once every 5-7 days, 5 times in a row in a pest free shed, and 5 minutes more after 2-3 times till 25 minutes per mu The fumigation time is also increased by 5-10 minutes every 2-3 times The results showed that ozone had a good control effect on tomato grey mould, leaf mould, early blight, late blight, cucumber downy mould, blight and other pests such as 100% louse, leafminer and aphid in greenhouse But for the diseases and insect pests in the greenhouse soil, because the amount of ozone gas penetrating into the soil is too small and the concentration is too low, it has no effect 3、 Precautions 1 Reasonably determine the amount of application and fumigation time The amount of ozone and the fumigation time should be adjusted according to different crops and their growth period Generally, compared with the seedlings, the plants at the mature stage have stronger adaptability to ozone If too much ozone is applied or the fumigation time is too long in the greenhouse, the light ones will cause the leaves and flowers of vegetables in the greenhouse to be poisoned and dried up, and the heavy ones will cause the plants to die With the growth of plants, the amount of application and fumigation time can be gradually increased, so as to achieve the goal of not only controlling diseases and pests, but also not harming vegetable crops The release should be as uniform as possible, and the air jet should not directly face the vegetables, and should be more than 0.8-1 meters away from the vegetable plants After the fumigation time arrives, ventilation shall be conducted in time, and the general ventilation time shall not be less than 30 minutes When fumigating in the shed, strictly prevent people and animals from entering, so as to avoid poisoning or other adverse reactions 2 Temperature and humidity control The indoor temperature should be kept in the range of 10-30 ℃ when ozone is applied, and the control effect will be better when the air humidity is high