Abstract:

In order to find good fungicide and herbicide, a new 1,2,4-triazole compound 4,4’-bis(benzo[e][4H-4-O-1,3-]oxazino[2,3-c][1,2,4]-triazole) was synthesized by diethyl oxalate, 85% hydrazine hydrate, salicylic acid and so on. Its structure was characterized by IR, 1H NMR and 13C NMR spectra. The fungicidal activity and herbicidal activity of the title compound were studied by growth rate method and agar mix medicine method, respectively. The results showed the title compound exhibited some inhibition against Gibberella zeae, Fusarium oxysporium, Valsa mali, Physalospora nasei, Ternaria solani and Phytophthora melonis, and the inhibitory activity was the most effective to Gibberella zeae with the inhibition rate and EC50 of 86.6% and 24.8 mg/L, respectively. The title compound also exhibited good activity to Lactuca sativa with the inhibition rate of radicle 94.5% when the concentration was 50 mg/L. When the concentration was 200 mg/L, the inhibition rate to radicle and hypocotyl were 95.8% and 93.8%, respectively. When the concentration was 400 mg/L, the inhibition rate to radicle and hypocotyl were close to 100%.