Preventive effect of against cucumber Fusarium wilt and improvement on cucumber growth and physiology.

Cucumber wilt is an important soil borne disease in cucumber production, which seriously affects the development of the cucumber industry. also has pharmacological effects such as antibacterial, analgesic, anti-inflammatory, and insect repellent. To study the control effect and mechanism of fumigation on cucumber wilt disease, different concentrations of fragments were applied on cucumber plants infected with . fumigation significantly reduced the incidence rate of cucumber Fusarium wilt. Under the fumigation treatment of 7.5 g kg fragments, the preventive effects were 74.7%. fragments fumigation can promote cucumber growth and synthesis of photosynthetic pigments, thereby improving individual plant yield and fruit quality. At 7.5 g kg fragments fumigation treatment, the plant height and individual plant yield of cucumber increased by 20.3% and 34.3%, respectively. fumigation can enhance the activity of antioxidant enzymes in cucumber, maintain a balance of reactive oxygen species metabolism, and enhance the plant disease resistance. Moreover, can also regulate the activities of Mg-ATPase and Ca-ATPase, enhancing its resistance to . Moreover, number of bacteria and fungi significantly decreased under fumigation. Those results suggested that could effectively restrain cucumber Fusarium wilt. This study will provide a new idea for the further use of biological fumigation to prevent soil-borne diseases.