三氯吡氧乙酸与异丙隆复配的联合作用及对小麦的安全性.

[Objectives]The paper aimed to enrich the application technology of triclopyr in wheat field, and provide solutions for the prevention and control of dominant weeds in wheat field. [Methods]The type of combined action of iprosulfuron and its safety to wheat were studied by whole plant bioassay. The selectivity of compound preparation between wheat and weeds was determined and verified in field. [Results]The results of greenhouse experiments showed that the combination of triclopyr and isoproturon had additive or synergistic effects on Veronica persic,Lamium amplexicaule,Galium aparine,Alopecurus japonicus and Beckmannia syzigachne. The suitable ratio of the triclopyr and isoproturon was (1-2) ∶ (2.9-5.8) ;after compounding with isoproturon at a mass ratio of 1∶2.9,the herbicidal activity was significantly improved, and the selectivity index of the mixture between wheat‘Yannong 999’and the tested weeds was 2.72-21.22. The field results showed that the control effect of triclopyr combined with isoproturon on the total plant and fresh weight of G. aparine,Stellaria aquatic,A. japonicas were 86.2%-95.5% and 88.8%-96.1% at 150 d after treatment. [Conclusions]The combination of triclopyr with isoproturon could reduce the dosage and expand the herbicidal spectrum, and it was safe for wheat. It could be used to control the annual weeds in wheat field. [ABSTRACT FROM AUTHOR]