The ozone produced by ozone equipment such as ozone generator has strong oxidizing power and sterilization effect, and is currently widely used in agriculture as an effective method for preventing phytotoxicity and environmental purification.
Ozone generators can effectively prevent downy mildew and gray mold of tomatoes, melons, and cucumbers in greenhouses, and can remove mildew and aphids on eggplants, mushrooms, potted flowers, etc., and also contribute to development. Only one small greenhouse is installed, and the pipes can be placed above the passage to achieve good dispersion results.
The ozone water of the ozone generator can drive out algae in the nutrient solution, and can also drive out the diseases in the nutrient solution. During root dipping planting, the concentration above 0.1MG/L will cause damage. If the nutrient solution is allowed to be disposed of during the fallow period, it is probably in a reincarnation method, that is, when the nutrient solution is returned to the storage tank, ozone is injected for sterilization.
Example: a single greenhouse, 350 square meters, with an average height of 2 meters. From December to March, the WS07 ozone machine is used. It is turned on once every 1-2 days, and the atmosphere is polluted for 60 minutes each time. At the same time, ozone is blown into the water tank every 3 days, and the 100-liter water tank is aerated for 20 minutes. Status of greenhouse vegetables treated with ozone:
Experimental Premise Air Ozone Concentration: 2-4 mg/cubic Drip Water Ozone Concentration: 0.2-0.4 mg/L Watermelon Powdery Disease: The powdery area formed on the leaf surface is reduced, the color becomes lighter, and the virus structure is crushed under the root. The source of powdery mildew is suppressed
Tomato Phytophthora disease: Mycelium and various spores contain active leaves and black hairs on fruit to reduce shedding, and pathogenic bacteria are no longer committed
Cucumber Downy Mildew: Purple-grey mildew on the back of the leaf, lightly curled leaves become developed, while the veins are clear, and the gray leaves are in place
Ozone spray to prevent airborne bacteria
Select tomato species with weak resistance to leaf mold, and set up 4 experimental areas for bacterial inoculation
1> The ozone water spray area with a concentration of 0.3 mg/l after spraying;
2>Pesticide spray area with 700 times concentration of chlorothalonil pesticide
3>Distilled water spray area
4> No inoculation and no spray comparison area.
Select 8 plants in each area with 5-7 main leaves, spray the leaves with a sprayer, and then calculate the disease incidence. It is only necessary to have disease spots on the leaves to be considered diseased. Disease incidence = (total number of diseased leaves/total number of leaves) * 100 (%). From the visual inspection results, it can also be concluded that the ozone area is second only to the pesticide area, and has its restraining results: the incidence of treatment forms in the experimental area (%) symptoms
1 Bacterial inoculation, application of ozone water 57.6 Punctate necrosis not found in other areas
2. Bacteria inoculation and pesticide application 53.7 did not show the occurrence of lesions
3 Bacterial inoculation, apply distilled water to 68.6 large visible lesions
4 No inoculation and no spray 52.2