• 研究论文 •

### 臭氧水对韭蛆的防治效果及对韭菜生长的影响

1. (1. 长江大学农学院, 湖北荆州 434025; 2. 中国农业科学院蔬菜花卉研究所, 北京 100081; 3. 全国农业技术推广服务中心, 北京 100026)
• 出版日期:2018-12-20 发布日期:2019-01-22

### Control efficacy of ozone water against Bradysia odoriphaga (Diptera: Sciaridae) larvae and its influence on the growth of Chinese chives

HU Jing-Rong1, SHI Cai-Hua1,*, XU Bao-Yun2, WEI Qi-Wen3, XIE Wen2, LI Chuan-Ren1, ZHANG You-Jun2,*

1. (1.CollegeofAgriculture,YangtzeUniversity,Jingzhou,Hubei434025,China; 2.InstituteofVegetablesand Flowers,ChineseAcademyof Agricultural Sciences,Beijing100081,China; 3.NationalAgro-TechExtensionServiceCenter,Beijing100026,China)
• Online:2018-12-20 Published:2019-01-22

Abstract:  Aim To determine the optimum irrigation period and application condition for controlling the larvae of the chive maggot, Bradysia odoriphaga, scientifically and rationally with irrigating ozone (O3) water. Methods We investigated the control efficacy of different concentrations of O3 water (5, 10, 20 and 30 mg/L) against B. odoriphaga larvae, the control efficacy of 30 mg/L O3 water against B. odoriphaga larvae in flat land covered with plastic film under different sunlight intensities, in three different irrigation conditions (flat land covered with plastic film, small arch plastic shed, and small arch plastic shed covered with petates), and at various irrigation frequencies of 30 mg/L O3 water under two different irrigation environments (flat land covered with plastic film and small arch plastic shed), respectively. And we also investigated the effects of 30 mg/L O3 water on the yield and root growth of Chinese chives in flat land covered with plastic film. In addition, we analyzed the influence of sunlight intensity on soil temperatures and the control efficacy of irrigating ozone water under different irrigation environments. Results In the flat land covered with plastic film, the optimum concentration of O3 water for the control against B. odoriphaga larvae was 20-30 mg/L. In treatments of irrigating 30 mg/L O3 water to flat land covered with plastic film, the control efficacy of O3 water against B. odoriphaga larvae was positively related to the sunlight intensity on the day of O3 water irrigation, the larval mortality of B. odoriphaga was up to 100% at 1 d after irrigation when the sunlight intensity was over 60 000 lx, while no significant control efficacy was found when the sunlight intensity was below 10 000 lx. When the sunlight intensity was moderate, the prevention and control efficacy of 30 mg/L O3 water against B. odoriphaga larvae was poor in the early stage, and gradually enhanced in the late stage. The effect of soil warming was positively correlated with sunlight intensity and significantly related with irrigation environments. The temperature of5 cmdeep soil under different irrigation conditions was as follows: flat land covered with plastic film> small arch plastic shed> small arch plastic shed covered with petates. The control efficacy of O3 water irrigated into the small arch plastic shed against B. odoriphaga larvae was significantly higher than that irrigated into the flat land covered with plastic film and that irrigated into the small arch plastic shed covered with petates. Repeatedly continuous irrigating of O3 water could improve the control efficacy of O3 water against B. odoriphaga larvae, and the control efficacy in the small arch plastic shed was more remarkable. When O3 water was irrigated, the distance between the inlet and the end of the farmland should not exceed40 m. After irrigating 30 mg/L O3 water in the plat land covered with plastic film, the plant height, weight and the number of fibrous roots of Chinese chives were significantly higher than those of the control (irrigating water), but the number of tillers per cluster of Chinese chive showed no significant difference from the control. Conclusion When the O3 water is irrigated scientifically and reasonably, it not only shows ideal control efficacy against B. odoriphaga larvae, but also can promote the growth of Chinese chives.