臭氧对设施蔬菜病虫害的应用效果

为明确臭氧水及气体在设施蔬菜病虫害防治中的应用效果,在设施条件下研究了臭氧水处理不同作物种子、臭氧水浇灌防治土传病害、臭氧气体对设施蔬菜主要病虫害的防治以及对蔬菜作物的伤害试验。结果表明,用臭氧功能水处理种子,在适宜浓度下能够促进作物种子的代谢和萌发;对发病初期的黄瓜根腐病、番茄青枯病、辣椒疫病等土传病害有一定的抑制作用。使用臭氧发生设备在温室内释放臭氧气体,对黄瓜霜霉病、白粉病、角斑病及灰霉病等气传病害有一定的防治效果;在室内可控条件下,释放臭氧30s,连续释放10次,每次间隔时间10min时,对烟粉虱、南美斑潜蝇的杀灭效果可达100%。总结出温室内臭氧释放的最佳浓度为0.8～1.0mg/m3,既能有效防治温室蔬菜病虫害,又不会对蔬菜作物生长发育产生伤害。

Application Effect of O3 on Control Disease&Pest for Greenhouse Vegetables

To make sure of exact effects of O3 water and O3 gas on greenhouse vegetables for disease and pest control,some experiments were tested under greenhouse condition,for instance,effects of crop seeds and soil - borne disease on ozone water,and effects of control disease and pest of vegetable in greenhouse and damage levels on ozone gas.Results showed that metabolism and germinate should be promote by proper concentration of O3 water.O3 could quite inhibit at early stage the cucumber root rot,tomato bacterial wilt,pepper phytophthora blight,etc.The use of ozone - generating equipment to the release of ozone gas in the greenhouse had a preventive effect on cucumber downy mildew,powdery mildew,angular leaf spot and gray mold and other air - borne diseases.Release O3 every 10minutes for 10 times and 30minutes long every time,Bemisia tabaci and Liriomyza huidobrensis could be 100% killed completely under indoor controlled conditions.Indoor optimum O3 concentration is 0.8~1.0 mg m3.It is not only control disease and pest of greenhouse vegetable,but also no harm for growth and development of crop.