关键词: 设施蔬菜, 病害, 植保机械, 臭氧, 灭菌, 防治效果

Abstract: In order to explore the efficacy of a new type of ozone sterilizer device in controlling vegetable seedling diseases and its impact on the growth of vegetables, experiments on disease control were conducted in greenhouses using tomato leaf mold, cucumber powdery mildew, and cabbage dampingoff as test subjects. In one of the greenhouses, the ozone plant protection machine was suspended from the greenhouse ceiling and used highvoltage discharge to generate ozone, which was then rapidly diffused throughout the facility using a highspeed fan and special air duct. The machine can be controlled remotely for realtime adjustment of ozone release, and its operation status can be constantly monitored using a mobile app. Thus, the ozone concentration in a facility can be dynamically adjusted to better control vegetable diseases. Compared with conventionally managed greenhouses without disease control measures, the incidence rates of tomato leaf mold, cucumber powdery mildew, and cabbage dampingoff in the greenhouse with the installed multifunctional plant protection machine were controlled at 5.2%, 4.7%, and 17.4%, which is 12.2%, 9.8%, and 1.8% lower, respectively, than the incidence rates in the conventionally managed greenhouse. The results showed that ozone had favorable control effects on tomato leaf mold and cucumber powdery mildew and showed certain control effects on cabbage dampingoff. Moreover, the ozone had no adverse effects on the normal growth of the vegetables. These data provide a reference for the wide use of ozone to control vegetable diseases in greenhouses.

Key words: greenhouse vegetable, diseases, plant protection machinery, ozone, sterilization, control effect