Preliminary Study on the Effects of Different Nutrient Solutions on the Parasitism of Cuscuta grandis to Mikania micrantha

[Objectives]This study was conducted to investigate the effects of different nutrient solutions on the parasitism of Cuscuta grandis to Mikania micrantha.[Methods]The growth-promoting effect of C.reflexa parasitizing M.micrantha was studied through the use of different concentrations of plant growth regulators(naphthalene acetic acid,gibberellic acid)and compounds containing trace elements(manganese sulfate,copper sulfate,zinc nitrate,boric acid).[Results]Mixing naphthalene acetic acid with a concentration of 0.01 ml/L and gibberellic acid with a concentration of 1 mg/L at a ratio of 1∶3 and then adding an equal volume of compounds containing trace elements including manganese sulfate with a concentration of 0.1 mg/L,copper sulfate with a concentration of 0.1 mg/L,zinc nitrate with a concentration of 0.1 mg/L and boric acid with a concentration of 2 mg/L,the average stem length of the breeding group increased significantly,about 2.47 cm,showing a significant difference from the CK.The survival rate of the experimental group using the plant growth regulators and the trace elements was 66.67%,and the survival rate of the control group was 56.67%.[Conclusions]This study can fill the gap in the study of seed morphology of C.reflexa,and is also of great significance for the identification and quarantine of C.reflexa.