Abstract:

In the invasion area of Cenchrus pauciflorus in Khorchin, in order to select the suitable chemical control herbicide in Khorchin area, different chemical control herbicides and combinations were used as test materials, the method combining field investigation with lab analysis was adopted to obtain the experimental data of the effects of different herbicide treatments and spraying time on control, relative control and vegetation coverage. The results showed the effects were significant. The optimal insecticide for the control and relative control on Cenchrus pauciflorus was 41% Glyphosate-Isopropylammonium, followed by 10% quizalofop-p-ethyl, 10% quizalofop-p-ethyl mixed with 90% acetochlor, 12.5% sethoxydim and 10.8% haloxytop-r-methyl. However, in view of vegetation coverage, the suitable herbicides were 10% quizalofop-p-ethyl, 12.5% sethoxydim, 5% imazethapyr, 23.5% sethoxydim and 10.8% haloxytop-r-methyl. In conclusion, the appropriate chemical control herbicides include 10% quizalofop-p-ethyl, 12.5% sethoxydim and 10.8% haloxytop-r-methyl in Khorchin, and only spraying once could obtain better effects.

Key words: Cenchrus pauciflorus, herbicide, screen, chemical control, Khorchin